textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 125 PM PDT Thu Jun 4 2026

- Breezy to gusty onshore winds mainly in the afternoon and evening - Mild to hot conditions Friday afternoon across the interior

- Notable cool down for the weekend through the middle of next week

- Hazardous beach conditions Thursday night through Saturday morning

SHORT TERM

Issued at 125 PM PDT Thu Jun 4 2026 (This evening through Friday)

Another afternoon of abundant sunshine across the Bay Area and Central Coast. The one exception to that statement is the Monterey Peninsula where low stratus continues to bump up against the terrain. Yesterday afternoon ended up being rather windy across the region. Today is less windy across the interior, but onshore flow is still occuring. KSFO is registering wind gusts of 25 kt this afternoon. Peeking at the 24 hour trend shows coastal areas are generally cooler while far interior are warmer, clear sign of onshore flow.

Tonight: Another night with a partial mixed marine layer. Hi-res guidance paints a picture of patchy stratus along the coast and locally inland with the biggest coverage over the Monterey Bay region. Almost a repeat of this morning.

Friday: Onshore flow remains with breezy afternoon seabreeze push. Outside of the marine influence temperatures will warm into the 80s and 90s again. Friday will end of being the warmest day of the bunch, but relief at night and onshore flow will keep HeatRisk values in check. Only the far interior locations reach the Moderate category.

LONG TERM

Issued at 150 PM PDT Thu Jun 4 2026 (Friday night through next Wednesday)

We've been talking about an upstream upper low and associated trough bringing a noticeable cooldown over the weekend and that is still on track. A system currently near the Gulf of AK will move eastward bring lower H5 and colder 850mb temp dropping temperatures below seasonal levels Saturday and Sunday. Highs will 60s/mid 70s coast/bays and 70s to mid 80s interior. The dropping heights will help to bring a more defined marine layer with night/morning clouds too. Lastly, the cold advection aloft will bring a solid push of onshore flow with gusty winds along the coast and inland valleys/gaps/passes Saturday afternoon.

Early next week we get another secondary trailing system. Global models are struggling with the trailing system with some keeping the low way north and others dropping it over CA. Clusters also reflects the uncertainty with more members leaning toward a more southerly push. As such, we still have a mention of showers in the region Monday into Tuesday. Chances are highest over the waters/coast/Bay Area northward. Even if showers develop not expecting much in the way of precip totals.

Warmer and drier conditions develop by Wednesday and Thursday.

AVIATION

(18Z TAFS) Issued at 1147 AM PDT Thu Jun 4 2026

Widespread VFR conditions as the last bit of stratus clears from the coastline. Clear skies and gentle to moderate breezes (generally from the west but locally driven) dominate the TAF period, with a couple of sites experiencing strong gusts in excess of 20kts. Coastal sites will see another round of stratus coverage tonight with IFR-MVFR ceilings. Currently, there is low confidence on how widespread stratus will be at HAF so, decided to leave it as FEW- SCT015 beginning tonight ~10pm PDT. The low to mid level airmass off the coast remains dry with satellite currently showing a wide gap in cloud coverage to the west.

Vicinity of SFO...VFR through the TAF period. Westerly winds pick up to moderate strength by the early afternoon. Gusts in excess of 20kts will also begin by then and persist until ~9pm PDT. Winds diminish to gentle breezes overnight into Friday morning, though they are expected to increase again to moderate strength by early Friday afternoon.

SFO Bridge Approach...NW to W moderate winds with strong gusts similar to that of SFO prevail into the evening. Winds diminish to a light breeze (~6kts) a bit earlier than SFO and become variable overnight. Aligns with SFO again by late Friday morning.

Monterey Bay Terminals...VFR through the afternoon until the stratus deck returns again this evening. The marine layer will become ~1000 feet deep overnight which will bring borderline IFR-LIFR ceilings at MRY around 9pm PDT and IFR ceilings at SNS around midnight. MVFR ceilings are expected by Friday morning at both terminals as the marine layer begins to erode. Onshore gentle breezes will prevail through the TAF period.

MARINE

(Tonight through next Tuesday) Issued at 242 PM PDT Thu Jun 4 2026

Hazardous conditions for small craft continue through the weekend. Gale force gusts are expected across the outer waters and along the coastal jet regions. Moderate to rough seas will continue to build through Friday to become rough to very rough for the inner and outer waters through the weekend. Conditions will gradually begin to improve Monday as northwesterly winds diminish to become fresh to strong and seas subside to become moderate.

BEACHES

Issued at 242 PM PDT Thu Jun 4 2026

A Beach Hazards Statement will go into effect at 3 AM Friday through 9 AM Saturday due to an increased risk of sneaker waves and strong rip currents. Long period southwest swell is approaching the Pacific coast, with periods of 17 to 18 seconds and a height of around 3 feet in the open waters. These long period swells result in increased risk of sneaker waves, potentially deadly waves which surge much further up the beach than expected and sweep unaware beachgoers into the ocean, and strong rip currents that can sweep the strongest swimmers away from shore. Never turn your back to the ocean! Inexperienced swimmers should stay from the water. Observe the waves for 20 minutes before moving closer. Swim near a lifeguard if possible, and if caught in a rip current, swim parallel to the coast away from the current, and then at an angle to shore.

RGass

MTR WATCHES/WARNINGS/ADVISORIES

CA...Beach Hazards Statement from late tonight through Saturday morning for CAZ006-505-509-529-530.

PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay.

Gale Warning until 3 AM PDT Saturday 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.

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

Small Craft Advisory until 3 PM PDT this afternoon for Pt Pinos to Pt Piedras Blancas 0-10 nm.

Gale Warning until 3 AM PDT Friday for Pt Pinos to Pt Piedras Blancas 0-10 nm.