textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1210 PM PDT Fri May 29 2026

- Temperatures return closer to normal by Sunday, and remain near or slightly above normal for much of the upcoming work week

- Cooler than normal temperatures may return by end of next week

UPDATE

Issued at 906 PM PDT Fri May 29 2026

No significant changes in the forecast this evening with quieter and drier weather in the wake of the upper level system that has now exited east. Areas of patchy fog are possible, especially in the North Bay between now and early Saturday morning but otherwise no hazardous weather concerns or impacts are expected tonight or Saturday.

SHORT TERM

Issued at 1210 PM PDT Fri May 29 2026 (This evening through Saturday)

The mid/upper level low that provided recent rainfall across the region has shifted over Nevada with a short-wave ridge building in from the Pacific. A mix of sun and clouds are expected throughout the afternoon as PWAT values remain ~1.00" and lingering surface moisture is abundant. Thus, cloud cover may limit how warm temperatures get today. We are forecasting maximum high temperatures to be in the upper 50s to middle 60s near the coast with middle 60s to lower 70s across the interior.

Expecting low clouds once again tonight with the potential for fog in the North Bay (mainly around Santa Rosa, Petaluma, and Navato) and coastal drizzle around the Monterey Peninsula. Any low clouds and/or fog that does develop is expected to clear out by midmorning (Saturday). As the ridge aloft shifts further to the east over the region, expecting the warming trend to continue on Saturday with high temperatures ranging from the upper 50s along the immediate coastline, low to middle 60s just inland, and lower to upper 70s in the interior.

LONG TERM

Issued at 1210 PM PDT Fri May 29 2026 (Saturday night through next Thursday)

Zonal flow will return to the region through the middle of the upcoming week while 500mb heights warm slightly. This will result in a warming and drying trend across the interior. By Monday and moreso into Tuesday, the marine layer is forecast to return resulting in cooler temperatures in coastal locations versus inland as low clouds will be slower to dissipate each morning. Conditions look to cool by late in the work week as troughing approaches the West Coast.

AVIATION

(06Z TAFS) Issued at 937 PM PDT Fri May 29 2026

The low cloud coverage is evolving as expected as the marine layer reforms under a building low amplitude ridge. It now looks more likely that ceilings will reach the IFR threshold for many of the terminals, and the 06Z TAFs have been adjusted in that direction. Clear skies will dominate Saturday after the morning clouds clear.

Vicinity of SFO...Ceilings managed to hang around all day, and the streak will continue through most of Saturday morning before clearing around midday. Onshore winds will gradually increase through the afternoon, with sustained winds greater than 20 knots expected in the several hours surrounding 00Z.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...MVFR ceilings will likely drop to high IFR in the next couple hours and stay there through the night as the marine layer becomes more organized and compresses under the building high pressure. There is a 100% chance for MVFR ceilings, 60% chance for IFR, and 15% chance for LIFR through the early morning hours.

MARINE

(Tonight through next Thursday) Issued at 906 PM PDT Fri May 29 2026

Stronger high pressure to the north will result in moderate to fresh northerly breezes tonight and into the weekend. The strongest winds will be over the northern outer waters. Occasional gale force gusts will occur the north of the Golden Gate and along the Big Sur Coast. Increasing winds and building seas will lead to hazardous conditions over the coastal waters beginning tonight lasting into the weekend.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory from 3 PM to 9 PM PDT Saturday for Mry Bay.

Small Craft Advisory until 3 AM PDT Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.

Small Craft Advisory from 3 PM Saturday to 3 AM PDT Sunday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.