textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1257 PM PST Thu Nov 20 2025

- Light, scattered showers continue south of the SF Bay this afternoon

- Any lingering showers expected to end by around midnight. Drier and very nice Friday.

- Quiet pattern setting up going into the Thanksgiving holiday. Dry and cool temps.

UPDATE

Issued at 839 PM PST Thu Nov 20 2025

Satellite imagery depicts the upper level low essentially placed over southern CA this evening, with mid to upper level clouds being observed over the central and southern half of northern CA. A few showers are being observed over San Benito County, with rain chances diminishing during the evening and overnight hours. Cooler temperatures are on tap for tonight, bottoming out in the low to mid 40s for much of the region perhaps a few degrees cooler for localized spots in the North Bay. The upper 30s are possible for interior Monterey and San Benito counties and some areas of higher terrain in the Diablo Range.

SHORT TERM

Issued at 1257 PM PST Thu Nov 20 2025 (This evening through Friday)

Isolated showers south of the SF Bay will continue to taper off this afternoon. Moisture on the decline with drier air moving in from the northwest. Shouldn't expect too much more rain outside of a few very isolated showers here and there through the early evening. We'll dry out everywhere by about midnight, becoming clear overnight which will help us cool off by a few degrees. This will likely be one of the coolest nights we've had so far this season with overnight lows in the lower 40 nearly across the board, mid-to-upper 40s along the coast and upper 30s for interior high elevations. Friday looks like a wonderful day to be out and about with any lingering clouds clearing out early and sunny skies persisting through the day.

LONG TERM

Issued at 1257 PM PST Thu Nov 20 2025 (Friday night through next Wednesday)

Light offshore flow as the closed off upper low lingers around SoCal/Baja, resulting in weak easterly winds aloft. The marine layer is expected to reform late Saturday once the atmosphere begins to re-stratify, but these weak offshore winds will keep it fairly compressed. Therefore, fog chances increase along the coast and low inland valleys beginning Sunday morning into early next week. Not too much in the way of additional impacts from the offshore winds other than keeping us a bit cooler. Pretty quiet pattern going into mid next week other than that. A nice ridge pattern develops along the West Coast and amplifies into the Thanksgiving.

AVIATION

(06Z TAFS) Issued at 932 PM PST Thu Nov 20 2025

It's VFR-MVFR with lingering showers tonight otherwise expect patchy fog /LIFR-IFR/ developing late tonight and Friday morning. Patchy morning fog will mix out by late Friday morning otherwise VFR.

Vicinity of SFO...VFR. West to northwest wind 5 to 10 knots becoming north-northeast 5 knots early Friday then shifting to northwest 10 knots Friday afternoon and early evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR. A few lingering showers through the evening otherwise dry tonight and Friday. West to northwest winds 5 to 10 knots decreasing to light and variable winds tonight and Friday morning. Westerly winds 5 to 10 knots Friday afternoon and early evening then light southeasterly Friday night and early Saturday.

MARINE

(Tonight through next Wednesday) Issued at 924 PM PST Thu Nov 20 2025

Hazardous marine conditions continue through the weekend as winds and swells build. Moderate to strong winds continue to build with strong to near gale force gusts. Winds diminish early Friday with moderate northerly winds expected into next week. Seas are building to 10 to 15 feet and remain elevated into early next week. Elevated seas will be prolonged by the arrival of two distinct rounds of long period northwesterly swell.

BEACHES

Issued at 327 PM PST Thu Nov 20 2025

A Beach Hazards Statement is in effect through Monday evening. A long period northwesterly swell will result in an increased risk for sneaker waves and rip currents. Breaking waves of 13 to 18 feet are expected. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers.

MTR WATCHES/WARNINGS/ADVISORIES

CA...Beach Hazards Statement through Monday evening for CAZ006-505- 509-529-530.

PZ...Small Craft Advisory until 9 PM PST Friday for Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm.

Small Craft Advisory until 9 AM PST Friday for Pigeon Pt to Pt Pinos 0-10 nm.

Small Craft Advisory until 9 AM PST Saturday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.