San Francisco woke up today to that classic coastal combo of cool, damp air in the low 50s and a stubborn marine layer sitting on the city like a weighted blanket. Expect foggy mornings to linger before skies clear into sunnier afternoons. Highs should reach near 68°F across much of the city, with inland neighborhoods running a bit warmer, and overnight lows slipping back into the low 50s. In other words, bring layers for the chilly commute and peel them off by midafternoon.
Afternoon Winds Pick Up
Onshore winds will strengthen this afternoon, generally out of the southwest at 2–10 mph but noticeably gustier in exposed spots. Forecast discussions highlight gusts of 24–25 knots (about 28–30 mph) at SFO this afternoon, which can make bridges and hilltops feel especially windy. According to the National Weather Service, small-craft conditions will develop offshore, so mariners should keep an eye on advisories.
Coastal Fog And Marine Advisories
Patchy stratus is already building along the Peninsula and around Point Reyes and should hang on through mid-morning before retreating to make room for sunnier skies inland. Out on the water, seas are set to build later today, with fresh swell expected in the 8–12 foot range and Small Craft Advisories in effect for several coastal zones starting this afternoon. Recreational boaters can expect choppy conditions through Thursday. It is a good time to secure loose gear in harbors and think twice about exposed trips while those advisories are posted.
Late-Week Outlook
The warming trend holds through Thursday and Friday, with interior neighborhoods ticking up a few more degrees and some inland spots possibly reaching above 80°F by Friday. After that, a trough moves in, deepening the marine layer and bringing a chance of drizzle or light showers starting Sunday and lingering into early next week. Outdoor plans for the latter half of the weekend may need a backup option if those showers materialize.
Bottom line: look for foggy mornings and sunny afternoons, breezy conditions this afternoon, and unsafe conditions for small boats offshore until advisories expire. Check the National Weather Service before heading out on the water or commuting across exposed bridges.
