textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 942 PM PDT Fri Apr 3 2026

- Winds ease into the weekend

- Warmer temperatures return Saturday and Sunday before a cooling trend begins next week

- Beneficial rain chances increase mid to late next week

SHORT TERM

Issued at 942 PM PDT Fri Apr 3 2026 (Tonight through Sunday)

The breezier winds of the day and eased and the ridge pattern is building. Winds remain weak through much of the weekend because of the ridge, with the overall surface pattern being light but widespread offshore flow. Overnight lows will be around 5 to 10 degrees warmer than previous nights, with some high-level clouds helping to prevent extra radiational cooling.

Saturday's forecast has shifted slightly cooler in the most recent model updates. While highs will still be near records, the potential for record breaking temperatures have reduced. It seems like models are picking up on the higher-level cloud cover limiting the mid-day warming along with a reduction of the offshore winds.

Sunday sees clearing conditions, leading to that afternoon being the warmest of the forecast. Predicted highs look similar to previous forecast runs, with good chances for record high temperatures to fall.

LONG TERM

Issued at 942 PM PDT Fri Apr 3 2026 (Sunday night through next Friday)

Luckily, this ridge pattern exits into the workweek preventing any threats of long lasting heat. The jet stream turns to more of a zonal flow by Monday, allowing for better onshore winds and a reforming marine layer. Coastal and Valley fog and status look to return Monday morning as a result of this pattern change. These factors will lead to notably cooler conditions, with a 5 to 10 degree drop in highs. However these temperatures will still be above average for this time of year.

Temperatures slowly cool into the mid and late week as the onshore flow increases ahead of building trough and low pressure. Models are in fair agreement that rain returns to the area in the mid-week as this low moves along the coast. The models differ in the late-week path of this low, with some showing rain chances lingering into the weekend itself as the low loses momentum. The official forecast still has the low and its showers exiting Thursday night, but this will be something that could change in following forecast updates. What stays the same is that this still looks to be good chances for widespread light rain. Most areas will struggle to get past a few hundredths of an inch, while the highest amounts in the area (the Santa Lucias) are predicted stay below a half an inch.

AVIATION

(12Z TAFS) Issued at 429 AM PDT Sat Apr 4 2026

Offshore flow lingers and dry airmass remains (early look at 12z Oakland sounding). Therefore, VFR conditions remain. High clouds continue to stream overhead and will do so through the TAF period. High confidence.

Vicinity of SFO...VFR. NE flow this AM then onshore by later afternoon.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR.

MARINE

(Today through Thursday) Issued at 429 AM PDT Sat Apr 4 2026

High pressure off the Pacific Northwest coast and low pressure along the California coast will maintain northerly flow this weekend. Light to moderate northerly breezes will persist into next week. A low pressure system over the Pacific will approach the coastal waters and bays by the middle of next week bringing a chance of rain, strong breezes, and moderate to rough seas.

CLIMATE

Issued at 110 PM PDT Fri Apr 3 2026

The following are the record high temperatures at the long term stations for April 4th and April 5th.

Location April 4th April 5th

Santa Rosa 88 in 1961 90 in 1939 Kentfield 85 in 1957 88 in 1924 San Rafael 86 in 1960 87 in 1957 Napa 86 in 1985, 1960 86 in 1989, 1957 Richmond 89 in 2011 83 in 1989 Livermore 87 in 1959 84 in 1989, 1916 San Francisco 84 in 1985 88 in 1989 SFO Airport 82 in 1985 84 in 1989 Redwood City 86 in 1960 87 in 1989 Half Moon Bay 77 in 2011 74 in 2016 Oakland Museum 85 in 1985 85 in 1989 San Jose 87 in 1960 89 in 1989 Salinas Airport 86 in 1989, 1960, 1952 95 in 1989

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...None.