San Francisco woke up today wrapped in a low cloud deck and pockets of fog, with shoreline spots stuck in the low to mid 50s while inland neighborhoods head for the mid 60s this afternoon. The marine layer is expected to hang on through the morning before retreating back toward the coast, so inland areas should see sunshine and milder temperatures by midday. Mother’s Day plans look comfortable away from the water, but anyone heading to the piers or beaches should still bring a jacket.
Morning Fog, Sunny Afternoons
Patchy stratus and a bit of drizzle were mostly confined to the coast early on, and the thicker marine layer is expected to top out around 900 to 1,200 feet before it breaks up. Inland valleys will get the best sunshine, with highs generally near 66°F and light west-southwest breezes that strengthen a bit more in more exposed spots this afternoon. Closer to the bay, plan on cooler temperatures and a stiff breeze along the shoreline.
Heat Peaks Monday, May 11
The warmest day in the short-term forecast arrives tomorrow, when San Francisco should climb into the low to mid 70s while far interior locations warm into the 80s and a few pockets approach 90°F. The National Weather Service is advising that sensitive populations take extra precautions, including staying hydrated, limiting strenuous outdoor activity during the hottest hours, and checking on older neighbors and relatives.
Boaters and Commuters
Out on the water, expect choppy seas and gusty northwest winds through this evening, with Small Craft Advisories in effect across parts of the coast into tonight and tomorrow, so ferry riders should plan for a bumpier commute. Low clouds are also likely to return overnight and into Monday morning, potentially reducing visibility and affecting early flights at SFO and nearby terminals.
If You Need Relief
City resources list cooling centers, public pools and water stations to help people ride out the warmer days, and details on locations and hours are available at SF.gov. Try to avoid leaving children or pets in parked cars, carry water on outdoor outings, and sign up for AlertSF for official notices.
