Bay Area Viewpoint Weather
Summits and overlooks, where elevation decides whether you look down on the fog or into it. Across the 10 places we track here, summer afternoons range from 59°F at Alcatraz Island to 83°F at Boggs Mountain Demonstration State Forest, a 24°F spread.
Standouts
Warmest summer afternoons
83°F
Boggs Mountain Demonstration State Forest has the warmest summer afternoons, averaging 83°F at the warmest hour.
Coolest summer afternoons
59°F
Alcatraz Island has the coolest summer afternoons, averaging 59°F.
Foggiest summer mornings
56%
Grizzly Peak is the foggiest, with fog in about 56% of summer morning hours.
Windiest summer afternoons
19 mph
Alcatraz Island is the windiest on summer afternoons, averaging 19 mph.
Most rain
55 in.
Cobb Mountain Area is the wettest, with about 55 in. of rain a year.
Least rain
25 in.
Twin Peaks is the driest, with about 25 in. of rain a year.
Compare all 10 viewpoints
| Place | Summer afternoons | Winter lows | Summer morning fog | Summer afternoon wind | Rain per year |
|---|---|---|---|---|---|
| Boggs Mountain Demonstration State ForestViewpoint · 3,500 ft | 83°F | 38°F | 5% | 6 mph | 49 in. |
| Cobb Mountain AreaViewpoint · 3,000 ft | 77°F | 37°F | 6% | 7 mph | 55 in. |
| Lick Observatory (Mt. Hamilton)Viewpoint · 4,209 ft | 76°F | 38°F | 2% | 10 mph | 28 in. |
| Robert Louis Stevenson State ParkViewpoint · 2,200 ft | 76°F | 40°F | 6% | 8 mph | 46 in. |
| Grizzly PeakViewpoint · 1,759 ft | 70°F | 42°F | 56% | 9 mph | 28 in. |
| Twin PeaksViewpoint · 922 ft | 65°F | 44°F | 48% | 13 mph | 25 in. |
| Jenner HeadlandsViewpoint · 800 ft | 65°F | 44°F | 34% | 11 mph | 51 in. |
| Hawk HillViewpoint · 920 ft | 64°F | 45°F | 46% | 16 mph | 28 in. |
| Marin HeadlandsViewpoint · 920 ft | 64°F | 45°F | 46% | 16 mph | 28 in. |
| Alcatraz IslandViewpoint · 135 ft | 59°F | 44°F | 34% | 19 mph | 25 in. |
Summer afternoons, fog, and wind are June to August averages from NOAA’s HRRR model, hour by hour. Fog is the share of 6–10 AM hours with fog. Winter lows are December to February averages, and rain is the yearly total, from NOAA 1991–2020 climate normals.