textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1215 AM PDT Fri Jun 12 2026

- Hot and dry through today for interior locations with a moderate risk of heat-related illnesses

- Minor coastal flooding due to higher than normal high tides anticipated across coastal regions of the San Francisco Bay Area

- Increased risk of sneaker waves and strong rip currents along south- and southwest-facing beaches this weekend

SHORT TERM

Issued at 1215 AM PDT Fri Jun 12 2026 (Today and tonight)

GOES-West nighttime microphysics imagery reveals a much-welcomed surge of stratus returning to Pacific coastal locations since the evening hours. This has resulted in broken/overcast skies to communities such as Monterey, Salinas, Santa Cruz, and Half Moon Bay, as well as the western half of San Francisco. Areas of fog have also been reported. Some locations in the Santa Cruz Mountains are running 10-15 deg F cooler compared to 24 hours ago. Following a hot day for interior areas, temperatures have been running generally a few to several degrees warmer.

Upper-level ridge remains the dominate synoptic feature over the eastern Pacific. For Friday, areas covered in Moderate HeatRisk will be primarily reduced to interior locations of the East Bay and South Bay. For these locations, the Heat Advisory continues through Friday evening. Temperatures will continue to moderate region-wide on Saturday.

High tide flooding will occur nightly along the Bayshore through the middle of next week. The combination of an upcoming new moon and lunar perigee on Sunday, and about 7 inches of additional tidal anomaly from a combination of storm surge, thermal expansion of the Eastern Pacific, and about 2 inches inches of Sea Level Rise since the vertical datums were established in the 80s and 90s will add up to bring tides up to 1.8 feet above normal through the weekend. While lower than the historic tidal flooding in January (peaked at 2.6 ft) the tides this weekend could end up being the highest observed in the Summer, beating the current record of 1.7 ft from July 2022.

LONG TERM

Issued at 1215 AM PDT Fri Jun 12 2026 (Saturday through Thursday)

A short-wave trough will cut along the outer periphery of the eastern Pacific ridge over the weekend. This will promote further cooling for interior locations into the second half of the weekend. Coastal locations can expect the usual June stratus. While temperatures will return closer to middle-June climatology, the main hazards will be the southerly swell along the coast, plus the coastal flooding associated with the high tides

AVIATION

(06Z TAFS) Issued at 1012 PM PDT Thu Jun 11 2026

A southerly surge of low clouds will continue to work its way north up the coastline overnight. Generally light onshore winds and a shallow marine layer should limit inland extent of low clouds overnight. IFR/LIFR ceilings and reduced visibility will impact primarily coastal sites overnight into Friday morning, including the Monterey Bay terminals and KHAF where localized fog has developed. Low clouds should spill through the Golden Gate, although confidence in the extent across SF Bay is lower. Low clouds should recede to the coastline by late Friday morning, then increase again Friday night. Winds Friday will be moderate onshore. Inland, VFR conditions will prevail through the TAF period.

Vicinity of SFO...Light west-northwesterly winds will prevail overnight. Stratus will flow through the Golden Gate into the SF Bay overnight with a few low clouds moving over the airspace. Moderate confidence that it will remain VFR through the TAF period. By Friday early afternoon, winds will become west- northwesterly and moderate (10-15 kts). A similar pattern will set up for Friday night with additional low clouds moving into SF Bay.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Primarily LIFR ceilings overnight with periods of IFR as well. Visibility will also be reduced but confidence in fog developing with visibility less than 1SM is lower. Conditions should improve by late Friday morning with generally VFR conditions in the afternoon. Light onshore winds overnight, increasing to 8-15 kt Friday afternoon. Low stratus resulting in IFR conditions is expected to return Friday evening.

MARINE

(Tonight through next Wednesday) Issued at 1012 PM PDT Thu Jun 11 2026

The gradient between subtropical high pressure in the Eastern Pacific and lower pressure over California is supporting a moderate to fresh northwest breeze across the northern coastal waters. Rough seas will gradually subside through the weekend as the winds decrease.

BEACHES

Issued at 1241 PM PDT Thu Jun 11 2026

Long period southerly swell will continue through the weekend, especially for south and southwest facing beaches. Hazardous beach conditions are advertised, specifically for moderate to steeply sloped beaches along the Pacific Coast of the North Bay, San Mateo, Santa Cruz counties. Be sure check beach conditions before you head out. Sneaker waves will run up the beach much farther than other waves, potentially catching beachgoers by surprise and resulting in people being swept into the water. Rip currents are strong enough to pull the strongest swimmers away from shore. Swim near a lifeguard if possible. Stay back from the beach, and away from jetties, piers, beachside rocks, and other infrastructure near the water. Never turn your back to the ocean!

MTR WATCHES/WARNINGS/ADVISORIES

CA...Coastal Flood Advisory until 3 AM PDT Wednesday for CAZ006-506- 508.

Heat Advisory until 7 PM PDT this evening for CAZ510-513>515.

PZ...Gale Warning until 3 AM PDT early this morning for Pt Arena to Pt Reyes 10-60 NM.