textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1227 PM PDT Sat May 30 2026

- Temperatures return closer to normal today, then climb slightly above normal for Sunday into beginning of next week

- Cooler than normal temperatures look to return by end of the upcoming work week

SHORT TERM

Issued at 1227 PM PDT Sat May 30 2026 (This evening through Sunday)

Temperatures are likely to warm into the upper 50s to middle 60s in northwest facing coastal areas while the interior warms into the low- to-upper 70s. This is as low clouds are beginning to dissipate regionwide. The warmest interior spots have a greater than 60% probability of reaching 80 deg F, such as the southern Salinas Valley and far interior East Bay (Byron and Brentwood to name a few).

The greatest potential for stratus to return is around the Monterey Bay region and the San Francisco Peninsula tonight into Sunday morning. This is as a short-wave ridge of high pressure begins to approach from the eastern Pacific. This will result in slightly warmer temperatures Sunday afternoon with upper 50s to around 70 deg F near the coast and coastal adjacent valleys. The most notable warming will occur across the interior with middle 70s to middle 80s expected under sunny skies.

LONG TERM

Issued at 1227 PM PDT Sat May 30 2026 (Sunday night through next Friday)

The short-wave ridge will shift eastward slightly and be more over the Bay Area and Central Coast on Monday. Thus, temperatures will continue the warming trend, warming some 5 to 10 degrees above seasonal averages. Still expecting a shallow marine layer to remain in place with northwesterly winds at the coast, but if low clouds do not develop in coastal areas Monday morning, expect coastal areas to be a few degrees warmer. By Tuesday the marine layer is forecast to deepen to around 1,000 ft allowing for stratus to return into inland valleys Monday night into Tuesday morning. Thus, current forecast temperatures may be a bit too warm for Tuesday afternoon. We will continue to monitor the latest trends.

Warming resumes on Wednesday and continues into Thursday with mostly zonal flow across the region. Slight day-to-day fluctuations are expected depending on the depth of the marine layer and associated marine influences across the Bay Area and Central Coast. By the upcoming weekend, the WPC 500mb Height-based Cluster Analysis has increasing probabilities that a trough will approach and move inland across the West Coast. This would bring cooler conditions to the region, however rain would likely remain well to the north of the region.

AVIATION

(00Z TAFS) Issued at 430 PM PDT Sat May 30 2026

Fairly straightforward set of TAFs as clear skies dominate the majority of the TAF sites. The only exception is Half Moon Bay, where MVFR ceilings just rolled in. MRY and SNS will likely develop a ceiling in the early morning. SFO and OAK are more 50/50, and the rest of the terminals should stay clear through the TAF period. Moderate onshore winds will decrease overnight before returning Saturday afternoon.

Vicinity of SFO...Mostly clear skies and moderate onshore winds will continue for a few hours before the winds start to ease tonight. I added a TEMPO line for the best ceiling window (12Z-16Z). Right now it looks like a 40% chance for MVFR conditions during this time, with a 60% chance of VFR. The remainder of the TAF period has a very good chance of staying VFR. Moderate onshore winds will return Saturday, with very similar timing and strength that we are seeing today.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Outside of HAF, MRY and SNS have the best chance for ceilings overnight as the marine layer looks to have the best chance to reform across the Central Coast early Saturday morning. Somewhere around 70-80% chance for MRY and 40-50% chance for SNS.

MARINE

(Tonight through next Thursday) Issued at 148 PM PDT Sat May 30 2026

Moderate to fresh northerly breezes are occuring over the nearshore waters and fresh to strong northerly breezes are being observed offshore. Occasional gale force gusts will occur in the far outer waters and the coastal jets to the south of Point Arena and along the Big Sur Coast. Seas will build in response and become rough leading to hazardous conditions over the coastal waters through Sunday and into Monday morning.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory until 9 PM PDT this evening 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 Pinos to Pt Piedras Blancas 0-10 nm.

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

Small Craft Advisory until 9 AM PDT Monday for Pt Arena to Pt Reyes 10-60 NM.