San Francisco starts Monday under morning stratus before the city flips to sunshine, but the bigger local concern is not rain falling from the sky: unusually high tides could push water into low-lying bayshore areas. Temperatures start near 55 degrees and rise to around 69 before afternoon winds and cooler air move in.
Morning stratus is expected, followed by sunny skies for most of the day. The National Weather Service expects onshore winds of 10 to 20 mph with gusts up to 30 mph regionally, and gusts of 20 to 25 knots near SFO.
High Tides Raise Bayshore Flooding Risk
A Coastal Flood Advisory runs from 11 a.m. Monday through 5 p.m. Thursday for bayshore locations along San Francisco Bay, San Pablo Bay and Monterey Bay. Up to 1.2 feet of water above ground level could reach low-lying shorelines, parks, lots and roads, with some coastal trails and beaches potentially cut off during high tide.
High tides could bring minor coastal flooding along the shoreline.
Warm-Up Arrives Tuesday
Monday will be the coolest day of the week before a sunny warmup takes over. Tuesday should reach about 77 degrees, Wednesday about 76 to 77, and unusually warm conditions are expected to continue from Wednesday through Sunday.
By Friday, San Francisco cools back to near 70 degrees under mostly sunny skies, followed by a weekend with highs around 70 or lower; Sunday is cloudy. The shift is a familiar Bay Area one: a breezy, jacket-worthy morning giving way to pleasant afternoon weather, just with a higher-than-usual need to keep an eye on the shoreline.
The updated outlook adds a meaningful change to the earlier forecast: along with the warmer midweek pattern, the new coastal flooding advisory creates a separate concern for waterfront paths, low-lying roads and bayside parks. Hoodline's Sunday forecast covered the initial drizzle and warmup trend, while Monday's advisory puts the emphasis on high-tide timing and shoreline impacts.
