textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 914 AM PDT Sat Oct 24 2026

- Near normal temperatures this weekend, cooling to slightly below normal through the remainder of the upcoming week

- Coastal flooding due to astronomical high tides and thermal expansion this weekend through Thursday

UPDATE

Issued at 928 PM PDT Sat Oct 24 2026

The skies remain clear across the Bay Area and Central Coast with some radiative fog and low clouds possible across the North Bay valleys early Sunday morning. The forecast remains on track.

DialH

SHORT TERM

Issued at 114 PM PDT Sat Oct 24 2026 (This evening through Sunday night)

Clear sky conditions are observed across all of the Bay Area and north Central Coast this afternoon. This has allowed temperatures to warm to into the upper 60s to lower 70s regionwide. Once the sun sets, temperatures will cool into the 50s and bottom out in the lower 40s across the North Bay Valleys Sunday morning. Elsewhere, expecting upper 40s to low 50s across the remainder of the region. There is a greater potential to see fog across the Russian River and Petaluma valleys early Sunday morning as the lack of offshore flow should allow for decent radiational cooling. However, incoming high clouds may limit that cooling as a cut-off mid/upper level low is forecast to push into the Pacific Northwest Sunday night into Monday. Expect temperatures to be similar on Sunday as they are today, generally within a few degrees of normal.

LONG TERM

Issued at 114 PM PDT Sat Oct 24 2026 (Monday through next Friday)

The aforementioned system mainly impacting the Pacific Northwest and northern California has the potential to bring very light rainfall to the northern coastal waters and far northern portions of the North Bay Monday morning, generally only a few hundredths of an inch or so. As such, temperatures cool to below normal by a few degrees on Monday with a gradual cooling trend throughout the remainder of the week as the mid/upper level trough off of the West Coast deepens. Cooler, unsettled conditions look to return by Friday and continue into next weekend. However, confidence has lowered since yesterday's writing. Be sure to stay up-to-date with the latest forecast information from trusted sources.

AVIATION

(06Z TAFS) Issued at 835 PM PDT Sat Oct 24 2026

The evening Oakland upper air sounding showed 0.43" precipitable water which is near the 10th percentile for late October. Dry air and a clear sky /VFR/ tonight to daybreak Sunday will allow radiative cooling which may form a few patches of valley fog /IFR- LIFR/ early Sunday. Cool air drainage winds i.e. land breezes will develop tonight and Sunday morning, thermally supported with land temperatures becoming cooler than sea surface temperatures (lower to mid 60s, well above October normals). Buoy air temps are cooler than sea surface temps and cooler air is forecast to continue over the coastal waters tonight, however it may be difficult for maritime low clouds to form depending if combined cooling (mainly from radiative cooling) can reach dew point temperatures. Cool air drainage breezes may help or may ultimately move low clouds away from land and mix the low clouds out. 06z TAFs continue to advertise mainly VFR.

Vicinity of SFO...VFR. West wind 10 to 15 knots decreasing to light northeasterly late tonight and Sunday morning. West wind 10 knots late Sunday afternoon and evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR. Winds east to southeast 5 to 10 knots tonight and Sunday morning. West to northwest winds 10 knots Sunday afternoon and early evening.

MARINE

(Tonight through next Friday) Issued at 828 PM PDT Sat Oct 24 2026

Gentle to moderate northerly breezes persist into early next week while becoming northwesterly with occasional fresh gusts. Rough seas will continue to gradually subside to moderate by Sunday and remain so through much of next week.

MTR WATCHES/WARNINGS/ADVISORIES

CA...Coastal Flood Advisory until 3 PM PDT Thursday for CAZ006-506- 508-529-530.

Coastal Flood Advisory from 9 AM Monday to 3 PM PDT Thursday for CAZ505-509.

PZ...None.