The Bay Area is starting the week in a steady weather pattern, keeping the region calm and mild. If you enjoyed Sunday’s weather, Monday will feel very similar. However, the day will start with thick tule fog, especially in the North Bay and northern Contra Costa County near the delta.
Morning Commutes May Be Affected
Areas marked in red and yellow will experience dense fog and low clouds during Monday morning, which could slow down traffic for commuters.
Sunny Afternoons with Pacific Hazards
Once the fog lifts, most of the Bay Area will enjoy crisp, sunny afternoons. But the ocean remains rough. The Pacific is seeing high waves, and a beach hazards advisory is in effect through Monday evening, with breakers reaching 10 to 20 feet along the coast.
Thanksgiving Week Outlook
Weather improves each day leading up to Thanksgiving. A high-pressure area moves into the region on Tuesday, peaking on Wednesday, and shifts inland by Thanksgiving Day. Expect clear skies, plenty of sunshine, and afternoon temperatures in the 60s — ideal for turkey day activities and travel.
Weekend Uncertainty
After Thanksgiving, weather becomes less predictable. A sudden stratospheric warming event will affect the Northern Hemisphere, making forecasts tricky. By the weekend, a disturbance from interior Canada may bring colder temperatures, offshore winds, and possible snow in the Sierra, though heavy rain is unlikely.
Monday Weather by Region
San Francisco
Morning clouds will linger, keeping the sun hidden for a while. By afternoon, the city will show its typical weather split. The Outer Sunset and Richmond districts may remain cloudy, with highs around 58–60°F, while areas east of Twin Peaks see early sunshine and temperatures in the low 60s. Nighttime lows will drop into the upper 40s and low 50s.
North Bay
Morning fog will affect valleys near Santa Rosa, Napa, and Petaluma. Visibility may be poor for early commuters. Afternoon skies clear up, with inland areas warming into the upper 60s and coastal Marin staying in the 50s. Nighttime lows will be in the upper 30s to low 40s.
East Bay
Morning clouds and patchy fog will cover the I-80 corridor. By afternoon, sunshine takes over, and temperatures range from the low to mid-60s. Overnight, the inland valleys dip into the low 40s, while bayside areas stay in the mid-40s.
Pacific Coast and Peninsula
Highway 1 areas see morning clouds clearing to sunshine in the afternoon, with highs in the low 60s. Beachgoers should stay away from the water due to sneaker waves and strong breakers. The Peninsula will clear fog by midmorning, with highs in the mid-60s and nighttime lows in the 40s.
South Bay
Morning fog may affect parts of the Santa Clara Valley. After it clears, the region will enjoy sunny skies and warm temperatures in the mid- to upper 60s. Overnight lows will be in the 40s.
Conclusion
Overall, the Bay Area can expect calm and sunny weather leading up to Thanksgiving, with morning fog and cool nights. Beachgoers should remain cautious of rough Pacific waters. After the holiday, a shift in the atmosphere may bring colder temperatures, offshore winds, and snow in higher elevations, but forecasts may change as conditions develop.
