textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1235 AM PDT Sun Jun 7 2026

- Cooler temperatures persist through Tuesday

- Slight chance for coastal drizzle/light rain late Monday into early Tuesday

- Warmer and drier conditions return mid to late week

SHORT TERM

Issued at 1235 AM PDT Sun Jun 7 2026 (Today and tonight)

Generally clear conditions prevail across the region with some stratus development visible on the western San Mateo Peninsula, the northern edge of the Santa Lucias near Monterey Bay, the Gabilan Range east of Salinas, and the Berkeley-San Leandro Hills. Stratus development through the night will be confined to the Monterey Bay and potentially the Morgan Hill-Hollister area, as strong mixing in the boundary layer disrupts radiational stratus formation.

Troughing dominates the weather pattern across the West Coast with an upper level low pressure system moving through the Pacific Northwest, leading to temperatures cooler than the seasonal averages. Today's high temperatures will hover in the middle 70s to lower 80s in the inland valleys, up to the middle to upper 80s in the warmest spots of eastern Contra Costa County and southern Monterey County, the middle 60s to the middle 70s near San Francisco Bay and the Santa Cruz coastal plain, and the upper 50s to middle 60s along the Pacific Coast and the southern side of Monterey Bay. Breezy winds are expected to develop in the afternoon and evening hours, but by that time the upper low should be moving into the northern Rockies and the Canadian Prairies, slackening the pressure gradient. This should result in the wind gusts not being as strong as they were yesterday. Wind gusts should top out around 20-30 mph along the coast and the Salinas Valley, with locally stronger gusts through gaps and passes and near favored coastal areas.

LONG TERM

Issued at 1235 AM PDT Sun Jun 7 2026 (Monday through Saturday)

A second low pressure system will reinforce the troughing pattern on Monday, leading to a slight dip in the temperatures as highs in the inland valleys dip into the 70s. As the second low moves through the Pacific Northwest, it will drag along a stream of moisture late Monday into early Tuesday. Model output shows precipitable water values of around 1" to 1.3", over twice the seasonal average this time of year. Any rain will be very light with the highest accumulations lying across the North Bay coastal ranges. Even there, the trend for progressively drier totals continues as the current forecast limits accumulations to less than a tenth of an inch, and even a higher end ensemble forecast limits the totals to less than a quarter of an inch in the Sonoma Coastal Ranges, and less than a tenth of an inch elsewhere within the Bay Area. However, as we sprint headfirst into the climatological dry season, any rainfall is beneficial.

By the later part of Tuesday into Wednesday, that second low pressure system will move into the Northern Rockies, and ensemble model output is converging on a ridge beginning to come into the West Coast, allowing inland highs to rebound to the 90s and the coasts to rise to the 60s and 70s for the middle and later parts of the week. These temperatures are raising the prospect of a moderate risk for heat-related illnesses, especially for sensitive populations including children, the elderly, pregnant women, and people who work or live outdoors. Gusty northerly winds are possible on Wednesday and Thursday across the interior regions, especially the North Bay interior mountains, as the trough digs into the Rockies. Ensemble model cluster analysis continues to differ on how deep that upper level trough will go, and any fire weather impacts from rainfall look to be minimal, if indeed there is any rainfall at all.

AVIATION

(06Z TAFS) Issued at 928 PM PDT Sat Jun 6 2026

Gusty west winds continue this evening but trends will be gradually decreasing overnight. Starting to see some stratus development along the San Mateo coast near KHAF as well as near KSNS. Given this expect some patchy low cigs forming overnight for KHAF and KMRY. Breezy west winds again Sunday afternoon/evening with just some increasing high clouds associated with incoming trof.

Vicinity of SFO...Airport Weather warning for gusty west winds continues through 06z, then gradually decreasing winds overnight. Skies to remain VFR through Sunday evening.

SFO Bridge Approach...Similar to SFO but lighter west winds. VFR skies.

Monterey Bay Terminals...NW winds for KMRY and KSNS with patchy cigs forming for KMRY overnight but mixing out early once again by 16z given shallow cloud depth and strong mixing in the boundary layer.

MARINE

(Today through Thursday) Issued at 858 AM PDT Sat Jun 6 2026

Gale force gusts will prevail across the outer and inner waters through early Sunday morning. As a result, very rough seas across the outer waters and rough seas over the inner waters with hazardous conditions for small craft through the remainder of the weekend. However, conditions do begin to improve Sunday with moderate seas and fresh northwesterly breezes for the beginning of next week.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory until 3 AM PDT early this morning for Mry Bay-SF Bay N of Bay Bridge.

Gale Warning until 3 AM PDT early this morning 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-Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory until 3 PM PDT Monday for Pigeon Pt to Pt Pinos 0-10 nm.