Alameda Weather
Town • San Francisco Bay Area
Across the Oakland Estuary from Fruitvale and Jack London Square, Alameda is an island city of tree-lined streets and Victorian homes. The aircraft carrier USS Hornet, now a museum, is docked at its western end. Its southwest shore is lined by Robert W. Crown Memorial State Beach, a 2.5-mile bay beach run by the East Bay Regional Park District with the Crab Cove visitor center. Ferries and a free water shuttle tie the island to Oakland and San Francisco. Bay water on every side is what sets its weather apart from the mainland next door.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Alameda weather today and through the year
It's 53°F at Alameda right now (feels like 51°F), with 5 mph wind and a comfort score of 77. Monday's forecast high at Alameda is 56°F, 8°F below the mid November normal of 64°F. The best window today is 9 AM to noon, at about 54°F with a 2 mph wind (comfort 57).
September is the warmest month at Alameda, with an average high of 75°F. January is the coldest, with an average low of 44°F. December is the wettest month (4.1 in.), out of about 20.2 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Alameda are August, September, and June. The best hours are usually noon to 3 PM in August, noon to 3 PM in September, and noon to 3 PM in June.
Water on every side keeps Alameda's temperatures in a narrower band than the mainland's. The bay warms slowly in summer and cools slowly in winter. On a warm afternoon the island rarely gets as hot as the East Bay valleys behind the hills. Winter nights stay mild. The trade-off is wind. Nothing blocks the summer west wind as it crosses the open bay, and the southwest shore at Crown Beach feels it first.
Forecast updated November 15, 2026 at 4:00 AM PST. Climate figures come from NOAA 1991-2020 normals. Hourly patterns come from NOAA's HRRR hourly analysis from September 2014 to April 2026.
What to expect at Alameda in the next few days
No active National Weather Service alerts for this location.
Best time to go
The best window today is 9 AM to noon, at about 54°F with a 2 mph wind (comfort 57).
Best day this week
Of the next 7 days, Friday looks best for Alameda, with a 61°F high and midday comfort near 79. Thursday looks weakest (50).
Rain
Next good chance of rain: today (72%, about 0.31 in.).
Ocean water
62°F at the Alameda (San Francisco Bay) NOAA station. NOAA data
Live weather map
Weather around Alameda right now
Overcast and 53° at Alameda right now.
About the live weather map for Alameda
The map centers on Alameda and stacks fog, satellite clouds, and precipitation radar on one view. Clouds come from the GOES-West satellite and rain from NOAA radar, and both show current conditions. Fog comes from our HRRR-based fog model, and the slider steps through its forecast for the next 12 hours.
Dots mark nearby places with their current temperature, colored by comfort score. Use the layer buttons to turn any layer off, or open the full map for every destination in the region.
Nearby Temperature Comparison
Conditions at nearby San Francisco Bay Area destinations
Tip: Bay Area temperatures can change by 20 to 30°F over a short distance because of microclimates.
Alameda vs nearby places
Typical summer conditions compared with Alameda, from the same NOAA HRRR hourly record. The list shows the closest places, then nearby places whose climate differs the most.
| Place | Distance | Summer afternoons | Morning fog | Afternoon wind | Compared with Alameda |
|---|---|---|---|---|---|
| Fruitvale | 1.1 mi | same | 24% | 7 mph | same 3 km weather-model cell, so our hourly data cannot tell them apart |
| Lake Merritt | 2.8 mi | same | 30% | 7 mph | a very similar climate |
| Jack London Square | 2.9 mi | -1°F | 29% | 7 mph | a very similar climate |
| Pacifica | 17 mi | -16°F | 56% | 9 mph | about 16°F cooler on summer afternoons and more summer morning fog (56% vs 24% of morning hours) |
| Moss Beach | 22.1 mi | -14°F | 66% | 9 mph | more summer morning fog (66% vs 24% of morning hours) and about 14°F cooler on summer afternoons |
| Half Moon Bay | 23.2 mi | -9°F | 64% | 8 mph | more summer morning fog (64% vs 24% of morning hours) and about 9°F cooler on summer afternoons |
Places with a climate like Alameda's
- Coyote Hills Regional Park (17 mi away): nearly the same temperatures every month
- San Pablo (15 mi away): nearly the same temperatures every month
- Don Edwards Wildlife Refuge (20 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Alameda climate comparisons mean
These cards compare recent conditions at Alameda with the available local baseline. Temperature and year-to-date rainfall use long-term normals when available. Fog, sunshine, wind, and comfort use the matching recent or modeled baseline identified on each card.
Positive and negative differences describe how Alameda departs from its own usual pattern. They should not be read as a direct comparison with another city or as a forecast beyond the period shown.
Alameda weather by month
September is the warmest month at Alameda, with an average high of 75°F. January is the coldest, with an average low of 44°F. December is the wettest month (4.1 in.), out of about 20.2 in. a year. Morning fog peaks in July, when fog or low cloud covers 27% of the hours from 6 to 10 AM. June has the clearest middays, with clouds covering about 21% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Alameda are August, September, and June. The best hours are usually noon to 3 PM in August, noon to 3 PM in September, and noon to 3 PM in June.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 58°F | 44°F | 3.8 in | 8 | 14% | 35% | 5 mph | 9.8 h | 60 |
| Feb | 61°F | 46°F | 4.0 in | 8 | 12% | 27% | 6 mph | 10.7 h | 63 |
| Mar | 64°F | 48°F | 3.0 in | 7 | 12% | 32% | 7 mph | 11.9 h | 66 |
| Apr | 66°F | 49°F | 1.4 in | 5 | 12% | 27% | 8 mph | 13.2 h | 73 |
| May | 69°F | 52°F | 0.7 in | 3 | 13% | 29% | 8 mph | 14.2 h | 76 |
| Jun | 73°F | 55°F | 0.1 in | 2 | 21% | 21% | 8 mph | 14.8 h | 87 |
| Jul | 74°F | 57°F | 0.0 in | 0 | 27% | 23% | 7 mph | 14.5 h | 86 |
| Aug | 74°F | 57°F | 0.0 in | 1 | 25% | 22% | 7 mph | 13.6 h | 90 |
| Sep | 75°F | 56°F | 0.1 in | 1 | 19% | 22% | 7 mph | 12.3 h | 90 |
| Oct | 72°F | 53°F | 0.9 in | 4 | 14% | 21% | 6 mph | 11.1 h | 83 |
| Nov | 64°F | 48°F | 2.1 in | 6 | 11% | 24% | 5 mph | 10.0 h | 76 |
| Dec | 58°F | 44°F | 4.1 in | 8 | 19% | 36% | 4 mph | 9.6 h | 59 |
Morning fog is the share of hours from 6 to 10 AM with fog or low cloud. Midday cloud is the average from 11 AM to 3 PM, and afternoon wind is the average from 1 to 5 PM. The highlighted rows are the most comfortable months.
What makes Alameda's weather different
When the fog burns off
11 AMwhen July fog usually thins (32% foggy at 8 AM)
Fog or low cloud covers Alameda in 32% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 11 AM. November mornings are the least foggy (11%).
When the wind picks up
1 PMwhen afternoon wind builds, March–October
From March through October, wind at Alameda typically builds after 1 PM. In April it peaks around 5 PM, averaging 9 mph with 3% of those hours windy, while mornings average 4 mph.
Model resolution
2 placesshare one 3 km NOAA HRRR grid cell
Alameda shares one 3 km grid cell in NOAA's HRRR model with Fruitvale. The hourly fog, wind, cloud, and temperature patterns on this site are the same for both. Real differences between them come from hills, elevation, and wind exposure that the model cannot resolve.
Daylight
9.6–14.8 hof daylight, Dec to Jun
Days at Alameda range from about 9.6 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:33 PM, and in mid-December around 4:57 PM.
Seasons at Alameda
- Warm seasonJun 8 – Oct 1 · highs 73°F+
The warm season lasts about 3.8 months, from Jun 8 to Oct 1, when the average high is 73°F or warmer. Highs peak around Sep 8 at about 75°F.
- Cool seasonNov 28 – Feb 26 · highs 62°F or lower
The cool season runs from Nov 28 to Feb 26, when the average high is 62°F or lower. The coldest nights come around Jan 8, with an average low near 44°F.
- Rainy seasonNov 16 – Mar 29 · 78% of the year's rain
The rainy season runs from Nov 16 to Mar 29, when a day has at least a 20% chance of measurable rain. That stretch brings 78% of the year's rain.
The dark line marks today. Season dates come from the smoothed daily NOAA 1991-2020 normals. Counting from Oct. 1, a typical year has its first inch of rain by Nov 1 and half of its annual total by Jan 25.
Days per year and extremes (Nov 1, 2024 to Oct 31, 2026)
This record runs from Nov 1, 2024 to Oct 31, 2026. Over this record, Alameda averaged 4 days a year at 90°F or hotter and no freezing nights. It averaged 13 days a year with at least half an inch of rain and 0 afternoons with wind of 20 mph or more at 2 PM. About 98 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Sep 9, 2026 (98°F) and the coldest night was Dec 13, 2025 (36°F). The wettest day was Nov 23, 2024 (1.94 in.), and the strongest 2 PM gust was 38 mph on Mar 12, 2025.
- 4days at 90°F or hotter
- 0nights at or below freezing
- 13days with ½ in. of rain or more
- 0afternoons with 20+ mph wind
- 98mornings with 3+ hours of fog or low cloud
- Hottest day98°FSep 9, 2026
- Coldest night36°FDec 13, 2025
- Wettest day1.94 inNov 23, 2024
- Strongest 2 PM gust38 mphMar 12, 2025
What shapes Alameda's weather
Alameda's west end, toward Alameda Point, faces San Francisco across open water and takes the cool ocean air from the Golden Gate head on. The east end, near the Park Street and Fruitvale bridges, sits behind the rest of the island and closer to the Oakland hills. Morning low cloud tends to linger longer on the west side, and afternoons there are breezier.
Alameda sits only a few feet above the bay, so winter tides matter as much as rain. The city warns that king tides, the highest tides of the year, can flood low areas even on dry days. High water also reduces how much storm runoff the drains can carry. A big storm arriving on a high tide is the island's main weather hazard.
Tips for visiting Alameda
Swim at Crown Beach, but without lifeguards
Swimming is allowed year round during park hours, and no lifeguards are on duty. The park district posts water test results for the swim beach.
Bring a card for beach parking
Crown Beach parking is cashless, so pay at the kiosk with a card or phone. The parking gate closes at 7 p.m.
Keep dogs off the sand
Dogs aren't allowed on the beach at Crown Beach, only on the lawns and paved paths.
Take the free water shuttle to Oakland
The city's free shuttle boat crosses the estuary between Alameda Landing and the foot of Broadway in Jack London Square.
Check the king tide map in winter
The city points residents to its King Tides Viewer to see which shoreline areas flood on the highest tides.
Alameda through the seasons
- Spring (March–May)
- Windsurfing and kiteboarding rentals and lessons start on spring weekends at Crown Beach as the afternoon wind builds.
- Summer (June–August)
- Summer is mild and breezy, and some mornings start gray, especially on the west end. The beach's sand castle contest is held each year on a low-tide Saturday morning in June.
- Fall (September–October)
- September and October bring the warmest, calmest beach days, with lighter wind and fewer gray mornings than summer.
- Winter (November–February)
- Winter is the island's rainy season. The city expects king tides around Thanksgiving, Christmas, and January, and they can cause coastal flooding even without rain.
Activities and the weather that matters
- Windsurfing and kiteboarding: Crown Beach is popular with both. Steady afternoon west wind from spring through summer is what they come for.
- Swimming and wading: The park district describes the water as warm and shallow. Calm, sunny afternoons in late summer and fall are best.
- Crab Cove visitor center: Exhibits and aquaria on bay life make it a good stop on gray or windy days.
- Biking the shoreline and Victorian neighborhoods: The island is flat and easy to ride in any dry weather. Ride the exposed shore in the morning before the summer wind builds.
Official sources and current conditions
- East Bay Regional Park District: Crown Beach
- City of Alameda: Visit Alameda
- City of Alameda: Oakland-Alameda Water Shuttle
- San Francisco Bay Ferry: Oakland and Alameda route
- NOAA water temperature: Alameda
Numbers on this page come from NOAA data. The text draws on the official sources linked above.
Historical Climate Data
Long-term weather patterns and climate data
Data sources: Recent temperatures come from NOAA URMA and recent precipitation from NOAA Stage IV. Fog, cloud, wind, humidity, and sunshine come from NOAA HRRR, and long-term baselines from NOAA 1991-2020 climate normals.
Climate Overview
Based on NOAA 30-year temperature/rain normals (1991-2020) with recent fog/sun baseline
🌟 Best Months to Visit
⚠️ Challenging Months
Monthly Breakdown
| Month | Comfort | High/Low | ☀️ Sun | 🌫️ Fog | 💧 Rain | Perfect |
|---|---|---|---|---|---|---|
| November 2024 | 82 | 63.6° / 48.4° | 6.5h | 3d | 3.05" | 21 |
| December 2024 | 72 | 60.6° / 47° | 4.9h | 8d | 4.67" | 13 |
| January 2025 | 84 | 60.8° / 44.1° | 6.8h | 4d | 0.18" | 21 |
| February 2025 | 76 | 61.7° / 46.1° | 6.3h | 4d | 4.64" | 17 |
| March 2025 | 83 | 62.9° / 47.4° | 7.8h | 0d | 1.31" | 21 |
| April 2025 | 90 | 66.3° / 50.2° | 9.3h | 4d | 0.19" | 27 |
| May 2025 | 95 | 71.5° / 53.2° | 11.4h | 1d | 0.22" | 31 |
| June 2025 | 92 | 69.6° / 54.2° | 11.1h | 9d | 0" | 29 |
| July 2025 | 90 | 70.2° / 56.9° | 10.1h | 9d | 0" | 31 |
| August 2025 | 92 | 75.9° / 59° | 10.2h | 7d | 0" | 31 |
| September 2025 | 89 | 76.2° / 61.6° | 8.6h | 3d | 0.08" | 28 |
| October 2025 | 88 | 71.7° / 56° | 7.8h | 4d | 1.46" | 26 |
| November 2025 | 80 | 65.1° / 51.3° | 6.3h | 5d | 2.77" | 19 |
| December 2025 | 71 | 58° / 45.5° | 4.9h | 11d | 3.88" | 8 |
| January 2026 | 80 | 62.7° / 45.8° | 6.7h | 3d | 3.46" | 23 |
| February 2026 | 78 | 64.4° / 48.7° | 6.4h | 7d | 3.98" | 17 |
| March 2026 | 94 | 76.6° / 54° | 9.6h | 2d | 0.06" | 30 |
| April 2026 | 86 | 67.6° / 52.2° | 8.6h | 6d | 4.03" | 24 |
| May 2026 | 91 | 69.8° / 54.2° | 10.8h | 6d | 0.48" | 30 |
| June 2026 | 93 | 72.8° / 56.7° | 11.5h | 7d | 0" | 30 |
| July 2026 | 92 | 73.7° / 58.2° | 11h | 7d | 0.02" | 31 |
| August 2026 | 90 | 73.7° / 58.6° | 9.9h | 11d | 0" | 31 |
| September 2026 | 91 | 75° / 58.5° | 9.3h | 5d | 0.17" | 29 |
| October 2026 | 89 | 74° / 55.1° | 8.1h | 3d | 0.31" | 28 |
Climate Trends
Average Temperature by Month
About the Alameda climate charts
The temperature chart compares average monthly highs and lows at Alameda, showing both the seasonal cycle and the typical day-to-night range. The comfort chart summarizes how often the combined weather pattern is favorable rather than judging temperature alone.
Precipitation shows the total recorded or modeled rainfall for each month at Alameda. Sunshine compares average bright-sky hours with the daylight available, while fog shows the average number of morning fog or low-cloud hours per day. Switch between the chart tabs to compare the same months across each measure.
Hourly Temperature, Fog, Wind, Cloud Cover, and Solar Radiation Patterns
Average local hour by month from 2014-09-30 to 2026-04-30
- Temperature: At Alameda, the warmest typical hour is 3 PM in September (75°F). The coldest is 7 AM in December (45°F).
- Fog: Fog or low cloud covers Alameda in 32% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 11 AM. November mornings are the least foggy (11%).
- Wind: From March through October, wind at Alameda typically builds after 1 PM. In April it peaks around 5 PM, averaging 9 mph with 3% of those hours windy, while mornings average 4 mph.
- Cloud Cover: June middays are the clearest at Alameda (21% average cloud cover), and December middays are the cloudiest (36%).
- Solar Radiation: The strongest typical sun at Alameda comes at 1 PM in June, averaging 934 W/m².
How to read the hourly heatmaps for Alameda
This heatmap shows how average temperature at Alameda changes by hour and month. Read left to right for the seasons and top to bottom for the time of day. Warmer colors mark the usual afternoon peaks, and cooler colors show overnight and winter lows.
This heatmap shows when fog or low cloud is most likely at Alameda. Darker cells mark the months and hours when fog has been most common. They help separate overnight or morning fog from cloud that tends to linger into the afternoon.
This heatmap shows the typical hourly wind pattern at Alameda through the year. It makes recurring afternoon wind, calmer overnight periods, and seasonal changes easier to compare than a single daily wind value.
This heatmap shows average cloud cover at Alameda for every month and hour. Use it to see whether cloudiness is mainly an overnight and morning pattern or commonly persists during the part of the day you plan to visit.
This heatmap shows the average solar radiation reaching Alameda by month and hour. Brighter cells indicate the strongest typical sun, while muted cells can reflect nighttime, shorter winter days, cloud cover, smoke, or terrain shading.
Each cell combines one month with one local hour. Hover over or focus on a cell for its value and sample coverage. The red marker shows the current month and hour.
How recent months compared at Alameda
- October 2026 recap: October 2026 at Alameda averaged a high of 74°F, 2°F warmer than the 1991-2020 normal of 72°F. It brought 0.31 in. of rain, compared with a normal of 0.94 in.
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 20.3 in. of rain to Alameda, 101% of the 20.2 in. normal.
Location Details
Alameda weather questions
Everything you need to know about weather and visiting Alameda
What is the weather like at Alameda today?
It's 53°F at Alameda right now, with a comfort score of 77 (great). Monday's forecast high at Alameda is 56°F, 8°F below the mid November normal of 64°F. The best window today is 9 AM to noon, at about 54°F with a 2 mph wind (comfort 57).
What is the best month to visit Alameda?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Alameda are August, September, and June. The best hours are usually noon to 3 PM in August, noon to 3 PM in September, and noon to 3 PM in June. The warm season lasts about 3.8 months, from Jun 8 to Oct 1, when the average high is 73°F or warmer. Highs peak around Sep 8 at about 75°F.
What are the warmest and coldest months at Alameda?
September is the warmest month at Alameda, with an average high of 75°F. January is the coldest, with an average low of 44°F.
When does the fog burn off at Alameda?
Fog or low cloud covers Alameda in 32% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 11 AM. November mornings are the least foggy (11%).
When is it windiest at Alameda?
From March through October, wind at Alameda typically builds after 1 PM. In April it peaks around 5 PM, averaging 9 mph with 3% of those hours windy, while mornings average 4 mph.
How much rain does Alameda get?
December is the wettest month (4.1 in.), out of about 20.2 in. a year. The rainy season runs from Nov 16 to Mar 29, when a day has at least a 20% chance of measurable rain. That stretch brings 78% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 20.3 in. of rain to Alameda, 101% of the 20.2 in. normal.
Can you swim at Crown Beach?
Yes. The East Bay Regional Park District allows swimming year round during park hours and describes the water as warm and shallow, but no lifeguards are on duty. Check the district's posted swim beach conditions and water test results before going in.
What kind of place is Alameda?
Across the Oakland Estuary from Fruitvale and Jack London Square, Alameda is an island city of tree-lined streets and Victorian homes. The aircraft carrier USS Hornet, now a museum, is docked at its western end. Its southwest shore is lined by Robert W. Crown Memorial State Beach, a 2.5-mile bay beach run by the East Bay Regional Park District with the Crab Cove visitor center. Ferries and a free water shuttle tie the island to Oakland and San Francisco. Bay water on every side is what sets its weather apart from the mainland next door.
What is Alameda weather like in November?
November at Alameda averages a high of 64°F and a low of 48°F, with 2.1 in. of rain over about 6 rainy days. About 11% of morning hours are foggy. Afternoon wind averages 5 mph.
More about Alameda weather
Guides that explain the weather here and nearby
- San Francisco Bay Water Temperature: Today & Monthly
- Red Tide in San Francisco Bay: Algal Blooms and Fish Kills
- Coastal Flood Advisory vs. Warning vs. Watch: What Each Level Means
- Bay Area Beach Day Trips: Best Weather Months by Location
- What Are Atmospheric Rivers? How They Drench the Bay Area
- Why Is September Hotter Than July in the Bay Area?
Data sources and methods
- Monthly temperatures and precipitation: NOAA 1991-2020 normals.
- Fog, cloud, wind, sun, and comfort by hour and month: NOAA's HRRR hourly analysis from September 2014 to April 2026.
- Daily records and recent months: NOAA URMA and HRRR analyses, plus NOAA Stage IV precipitation.
- Nearby comparisons and regional rankings use the same hourly HRRR summaries for every destination in the region.
- Alerts: National Weather Service. Tides and ocean temperature: NOAA CO-OPS, where shown.
- All statements on this page are computed from these datasets, apart from the “What shapes the weather” guide, which cites its sources inline.
- East Bay Regional Park District, Robert W. Crown Memorial State Beach (accessed 2026-10-27)
- City of Alameda, Oakland-Alameda Water Shuttle (accessed 2026-10-27)
- City of Alameda, residents urged to prepare for winter storms (Oct 23, 2026) (accessed 2026-10-27)
- City of Alameda, Visit Alameda (accessed 2026-10-27)
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