Berkeley Marina Weather

April is the standout month at Berkeley Marina. The data backs this up: April 2025 logged an average high of 73.4F, a comfort score of 91 out of 100, 12.8 hours of sunshine per day, and only 0.17 inches of rain. That combination is hard to beat anywhere on the bay. May runs a close second, with highs around 70F, 13 hours of sunshine, and zero measurable rain in 2025. Both months sit in that sweet spot before summer fog rolls in seriously and after the winter rains have mostly finished. The mornings tend to be clear, the afternoons warm without being hot, and the bay breeze is pleasant rather than punishing. If you have any flexibility in your schedule, target late April through late May for the best odds of a genuinely comfortable day at the waterfront. Learn more about Bay Area seasons.

Berkeley Marina is one of the windier spots on the East Bay shoreline, and that is not an accident. The marina sits directly on San Francisco Bay with no terrain blocking the prevailing westerly flow that funnels through the Golden Gate. Wind typically builds through the afternoon, peaking between 2pm and 6pm on warm days when Central Valley heat pulls coastal air inland. Summer afternoons regularly see sustained winds of 15 to 25 mph, which is why the marina is a popular kite-flying and windsurfing destination. Mornings are almost always calmer, often glassy before 10am. Wind mellows significantly in winter, though storm systems can bring gusty conditions from the south. If you want calm conditions for a picnic or photography, arrive early and plan to wrap up before early afternoon. Why the Bay Area has so much wind explains the pressure dynamics behind these afternoon gusts.

Yes, though the fog pattern here has its own character. Morning fog is a regular feature from June through August, averaging around 2 to 4 hours per day. June 2025 was the foggiest summer month in the dataset, logging 4 hours of morning fog per day on average. The fog typically arrives overnight or in the early morning, then burns off by late morning or midday. By early afternoon, Berkeley Marina is usually sunny even when the Bay Bridge corridor is still socked in. What you will notice on foggy mornings is not just reduced visibility but also a dampness and chill that makes light layers essential even in July. The upside is that summer afternoons here are rarely hot, with highs in the mid-to-upper 70s rather than the 90-plus temperatures you can find inland. How fog forms along the Northern California coast explains why the East Bay shoreline sits right at the fog's eastern edge.

Winter at Berkeley Marina is mild but damp. Average lows from November through January sit in the mid-to-upper 40s, with highs in the upper 50s. You are not looking at freezing temperatures here. The cold you feel at the marina in winter is more about wind chill and moisture than raw temperature. A 55-degree morning with a 15 mph bay breeze and overcast skies feels significantly colder than the thermometer suggests, so layering is still important even by Bay Area standards. November and December are the worst months in the data, with comfort scores dropping into the mid-60s. November 2025 averaged only 5.9 hours of sunshine per day and nearly 6 inches of rain. January is typically the wettest single month. That said, there are still plenty of clear, pleasant winter days, especially in December when a dry ridge sets up, as December 2024 showed with a comfort score of 80 and 7.6 hours of sunshine.

Layers are the answer at Berkeley Marina in almost every season. Even on warm summer days, the afternoon wind off the bay is strong enough that a light jacket or windbreaker is worth having in your bag. In summer, start with a t-shirt and bring a zip-up or shell you can pull on when the breeze picks up after noon. Sunglasses are essential year-round, both for sun and because the wind will make your eyes water on gusty afternoons. In spring and fall, treat the marina like a coastal destination: temperatures can swing 20 degrees between a calm morning and a breezy afternoon. In winter, a warm mid-layer and a water-resistant outer layer cover most situations. One thing people underestimate: the sun reflects intensely off the water, so sunscreen matters even on partly cloudy days. Dressing in layers for Bay Area weather covers the broader strategy behind this approach.

The clearest views of the bay, San Francisco skyline, and Mount Tamalpais come in late September through early November, and again in late winter. After summer fog season fades and before the winter storm track fully establishes, you get periods of exceptional clarity. September 2024 was a good example: 9.6 hours of sunshine per day, minimal fog averaging just 1.1 hours per day, and only 0.19 inches of rain. Those are near-ideal visibility conditions. April is another strong month for clear views, with low fog and high sunshine totals. The worst visibility comes on winter storm days when rain and low clouds reduce sightlines to a few hundred yards, and on summer mornings when marine layer fog blankets the bay. Midday and afternoon in summer, once the fog burns off, deliver sharp views with spectacular light on the water, though you will be shooting into the wind.

Berkeley Marina averages about 68 rainy days per year, which is modest by Northern California standards but concentrated heavily in the wet season. November, December, and January are the months to watch. November 2024 dropped 6.13 inches, November 2025 logged 5.94 inches, and January 2025 saw 5.47 inches. That is the bulk of the year's rainfall packed into three months. October and March are transitional: you can get significant rain events, but you can also get beautiful stretches of dry weather. The good news is that the dry season at Berkeley Marina is genuinely dry. May, June, July, and August 2025 all logged zero or trace rainfall. From May through September you can plan outdoor events at the marina with high confidence. The Bay Area's rainiest months follows the same seasonal pattern you see here.

Cool is the accurate word. Summer at Berkeley Marina is not beach weather by most people's standards. July and August average highs in the mid-to-upper 70s, which sounds warm on paper, but the consistent afternoon wind and the occasional fog keep it feeling more like a brisk Pacific coast day than a hot summer afternoon. July 2025 averaged a high of 76.2F with a comfort score of 88, which tells the story: pleasant and comfortable, not hot. This is a feature for people who want to spend time outdoors without overheating. Nearby inland locations like Walnut Creek or Livermore will be 20 to 30 degrees hotter on the same day. The marina's position on the bay keeps temperatures remarkably stable. If you are coming from inland looking for relief from summer heat, Berkeley Marina is exactly what you want. If you want warmth for sunbathing, pick your days carefully and arrive mid-afternoon after the fog clears.

Berkeley Marina sits on the eastern edge of the fog belt, which means it gets more fog than inland East Bay neighborhoods but less than San Francisco. Morning fog here averages about 2 to 3 hours per day in summer. In June 2025, the foggiest month in the dataset, the marina averaged 4 hours of morning fog per day but still logged 11.7 hours of sunshine overall. The fog typically burns off before noon, while parts of San Francisco may not see sun until late afternoon. North Berkeley and Albany, both just a mile or two inland, see even less fog, making them useful alternatives if you want guaranteed morning sunshine. The marina's waterfront position means it will always be foggier and windier than its immediate neighbors. Why Bay Area mornings are so foggy explains the marine layer mechanics behind this gradient.

Spring, specifically late March through May, is consistently the most comfortable season at Berkeley Marina. The weather data is clear on this: March 2025 scored 87, April 2025 scored 91, and May 2025 scored 88 on the comfort index. Those are the three consecutive months with the highest scores in the entire 18-month dataset. Rain is winding down but not gone, fog has not yet ramped up for summer, and temperatures are warm enough for outdoor activity without requiring constant wind protection. Sunshine totals in April and May run 12 to 13 hours per day. Fall is a reasonable second choice, with September and October often delivering warm, clear afternoons and much less fog than summer. The main risk in fall is an early rain event. Summer is comfortable but not warm, and winter is mild but wet. Spring is the season where all the variables line up at once. Why the Bay Area has so many microclimates helps explain why these seasonal windows are sharper here than in most regions.