San Francisco is waking up to cool, mostly cloudy conditions around 58 degrees today, with sunshine expected later in the morning. Afternoon temperatures should reach the low 70s before another chilly night, but the bigger concern this week is along the water, where unusually high tides could push into low-lying bayshore areas.
Sunny Afternoon, Breezier Ridgelines
Morning fog and low clouds should thin by late morning, giving way to a mostly sunny afternoon with a high near 72 degrees. West-southwest winds will run about 7 to 14 mph, while exposed ridgelines and passes could see much stronger gusts, according to the National Weather Service. Tomorrow looks similar, with a high near 73 and gusts reaching 21 mph.
Cooler By Thursday
The city’s gradual cooldown continues through Thursday, with highs near 72 on Wednesday and 71 on Thursday before a slight warm-up late in the week. Overnight lows will stay mostly in the upper 50s to around 60 degrees. Rain chances remain close to zero in the standard forecast, though forecasters see up to a 10% chance of elevated showers or thunderstorms Wednesday and Thursday, mainly across southern and eastern parts of the region.
Late-Night High Tides Could Flood Low Spots
A Coastal Flood Advisory remains in effect through 2 a.m. Thursday for bayshore locations along San Francisco Bay, San Pablo Bay and Monterey Bay. The NWS San Francisco forecast discussion says up to 1.6 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
At the San Francisco tidal gauge, high tide is expected around 10:01 p.m. today, 10:57 p.m. tomorrow and 11:49 p.m. Wednesday, with water levels roughly 1.4 to 1.6 feet above normal. Flooding could affect parking lots, parks and shoreline roads, with isolated closures possible. Anyone traveling near the bay should allow extra time, avoid barricades and never drive through water of unknown depth.
Higher Terrain Faces Fire-Weather Concern
Inland hills and higher terrain also face elevated fire-weather conditions today after a stretch of hot, dry weather. Gusts up to 30 mph are possible through gaps, passes and ridgelines, while afternoon humidity in the driest areas could fall to 15% to 30%. The strongest concerns are outside the city, but hikers and drivers headed into the hills should be alert for sudden wind and rapidly spreading fire.
