San Francisco woke up in classic coastal mode today, socked in by a thick marine layer and patchy fog with temps parked in the mid-50s. The gray should peel back by late morning, with partly sunny skies and a seasonable high near 63°F for most neighborhoods.
Foggy Mornings, Sunny Afternoons
Areas of fog are expected before 10 AM, trimming visibility in low-lying spots and along the waterfront. West-southwest winds will stay on the weak side at about 3–8 mph while the marine layer slowly erodes. As the clouds thin, inland neighborhoods should climb to around 63°F before easing back into the upper 50s by late afternoon.
Tonight Into Monday: Slight Chance Of Rain
Later tonight until tomorrow, a closed low sliding east across northern California will bring a slight chance of light rain to the North Bay and the Pacific coast. Any showers are expected to be minor, with new rainfall totals likely to stay under one-tenth of an inch, and a mix of patchy drizzle and fog is likely. Overnight lows should bottom out near 53°F. According to the National Weather Service, the best window for measurable light rain is late Sunday night into the early morning hours tomorrow.
Midweek Outlook: Warming With Gusty Offshore Winds
High pressure is projected to build in by mid to late week, ushering in drier air and milder afternoons. Interior neighborhoods are on track for highs in the mid-60s and could push into the mid-70s by Friday and Saturday (March 6–7) if the pattern holds. Forecast guidance also points to increasing offshore winds later in the week, which could bring gusty conditions onshore and larger day-to-night temperature swings.
What This Means For Your Commute
For now, morning fog is the main hassle. Plan on extra travel time, slower speeds, and reduced visibility on bridge approaches and near the Bay. At the airports, MVFR/IFR ceilings are possible overnight until tomorrow morning. The National Weather Service also flags that coastal waters may turn choppy later in the week as strong northwest winds kick up, with seas building above 12 feet.
