textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1257 AM PDT Sun May 24 2026

- Seasonal to slightly below normal temperatures through Memorial Day Weekend

- Inside slider like pattern will bring strong northerly winds Tuesday and kickoff a gradual warming and drying trend Wednesday

SHORT TERM

Issued at 1257 AM PDT Sun May 24 2026 (Today through Monday)

Surface troughing will continue through Memorial Day Weekend. This will keep the marine layer deep around 2,000 feet with early returns and late clearings. Sensible weather wise, temperatures will remain near to slightly below normal with onshore flow. Gusts of 25-35 mph are expected along the coast, across ridgelines, and through west- east oriented gaps and passes.

LONG TERM

Issued at 1257 AM PDT Sun May 24 2026 (Tuesday through Saturday)

Global ensemble clusters are in agreement of upper-level troughing arriving Tuesday, marking the coolest day of the week. Strong northerly winds will develop, bringing gusts of 30-40 mph to the coast, across ridgelines, and through gaps and passes with widespread hazardous conditions for small craft across the waters. As the trough digs, it is expected to become a cutoff low. While there is uncertainty in the exact location, strength, and timing, it is looking likely that an inside slider like pattern will develop Wednesday into Thursday. While inside slider is usually synonymous with elevated fire weather conditions, good to excellent overnight relative humidity recovery will help mitigate these concerns for now. This pattern will support northerly (drying) winds, kicking off a gradual warming and drying trend. The aforementioned cut off low will fill and become an open wave by Friday, leaving zonal flow with onshore flow in its wake.

AVIATION

(06Z TAFS) Issued at 930 PM PDT Sat May 23 2026

Bay Area terminals and South Bay terminals will continue to be VFR until after midnight when MVFR cigs will develop and persist through late Sunday morning. Guidance provides confidence that cigs will mostly be MVFR or hover near it, like KSTS is at issuance time. Timing for MVFR to VFR is less confident, with guidance suggesting MVFR cigs may persist into Sunday afternoon. Breezy onshore flow will persist through the TAF period for near coastal sites.

Vicinity of SFO...VFR will continue until after midnight when MVFR cigs are expected to develop and persist through late Sunday morning. Confidence on timing is better for KSFO and KOAK than other sites. Breezy onshore flow will persist through the TAF period.

SFO Bridge Approach...Similar as SFO.

Monterey Bay Terminals...MVFR cigs will persist through at least late morning, however there is a chance that MVFR cigs persist through the entire TAF period with breezy onshore flow as well. Another otter eddy is expected to develop just offshore of the North Bay early Sunday morning, but then drift farther offshore and north with Monterey Bay not seeing any influence and potential help in clearing.

MARINE

(Tonight through next Friday) Issued at 930 PM PDT Sat May 23 2026

Light breezes and diminished seas will persist through through Tuesday. Strong northwesterly winds from a developing system set to arrive on Tuesday will result in building rough seas for the second half of next week.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...None.