textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1230 PM PST Sun Nov 8 2026

- Slightly warmer and dry weather through the midweek

- Coastal flooding due to high tides through Friday

- Hazardous beach conditions through Monday

- Unsettled weather returns by late week and into the upcoming weekend

SHORT TERM

Issued at 1145 PM PST Sun Nov 8 2026 (Tonight through Tuesday)

Dry weather continues over our forecast area due to a nearly stationary long wave ridge centered over the southwestern states. Cirrus clouds with the southern extent of the polar jet stream are moving over the North Bay while to the south it is clear. Nocturnal radiative cooling, most pronounced south of the cirrus clouds, is allowing continental air to cool (higher pressure), setting up a light land breeze in contrast to the much of above Nov normal sea surface temps in the 60s as much as +10F to +11F above Nov normal (air in contact with the warmer sea surface temps equals lower pressure). Surface winds flow from high pressure to low pressure, which is keeping the warm maritime influence held to the coastline or even nudged slightly offshore. Sea surface temps as warm as they are could easily keep coastal night-time/morning minimum temperature much warmer (e.g. San Francisco Aug 2015 set about a 1/2 month of record high min temps, recall El Nino of 2015-2016), but remarkably at this time so far this has not been the case because of continental influence. November (vs August) brings occasional mid-latitude weather influences, much lower sun angle, longer night time cooling hours.

Cooling tonight through daybreak Monday will produce additional low clouds and patches of fog. Because of the much above normal sea surface temperatures, water vapor availability is much more robust. Daytime sea breezes temporarily usher higher water vapor and hazy conditions inland, then when the winds turn neutral to a light land breeze, cooling is introduced (cooling described above) and it is easy to reach saturation. Patchy dense fog may redevelop tonight and Monday morning. Will monitor satellite and observations and issue a dense fog advisory if needed.

Daytime highs Monday and Tuesday will continue slightly above normal with highs in the upper 60s at the coastline to the 70s and lower 80s inland. Night-time lows will be in the 40s and 50s. A very weak 500 mb trough in the flow will pass by this time tomorrow night otherwise high pressure will prevail through early week.

LONG TERM

Issued at 1145 PM PST Sun Nov 8 2026 (Tuesday night through next Sunday)

An increase in northern hemispheric long wave troughs is occurring and will continue to hold during this time-frame. One long wave trough will strengthen over the northeastern Pacific and another long wave trough will strengthen downstream over the eastern states. In the 120 hour time-frame, out to Friday, the leading edge of strong polar jet stream winds will dig southward forming a closed 500 mb low ~ 300-400 miles to our west-southwest Thursday. Steering winds will continue to drive the newly formed closed 500 mb low toward southern California. This may leave a cold frontal passage with a chance of rain for our forecast area on Friday, though this is a low confidence forecast since model output is varying on rain amounts. Friday is five days out which is about the max we can rely on for global model output in the complex seasonal transition period of fall-winter. Dynamic strengthening is forecast upstream and downstream, both within the long wave trough over the east and to our west, but also with the ridge in between, nudged slightly forward during this time. If the upstream long wave trough is able to slowly advance eastward, this should increase the chance of rain here, possibly to a greater chance Sunday.

AVIATION

(12Z TAFS) Issued at 326 AM PST Mon Nov 9 2026

Another lower confidence morning due to mixed CAT from LIFR at STS,APC,OAK to VFR other locations. High clouds streaming over the N Bay are making it hard to track dense fog. Recent trends in SF Bay do show shallow stratus is developing and spread across the Bay. Expect some impacts inside the Bay during the AM rush with dense fog at OAK. Fog at OAK may drift N and be replaced by CIGs near sunrise.

Vicinity of SFO...VFR currently but nearby CIGs are filling in and decided to keep the tempo of CIGs. VFR this afternoon with onshore flow. Lower chc of CIGs returning late tonight.

SFO Bridge Approach...Stratus CIGs filling in over the S end of the approach. CIGs linger 17zish

Monterey Bay Terminals...VFR with drainage flow to the Bay.

MARINE

(Today through Saturday) Issued at 326 AM PST Mon Nov 9 2026

Moderate period with longer periods will continue to produce rough to very rough seas. Moderate to fresh northerly breezes will prevail through Tuesday, with bays remaining more sheltered. Seas begin to subside Tuesday and winds will back through the day Wednesday to become southerly. A much large swell is forecast to arrive next weekend.

BEACHES

Issued at 330 AM PST Mon Nov 9 2026

Beach Hazards Statement:

Beach Hazard Statement remains in effect. Latest buoy obs show the moderate swell and moderate period continue to produce an energetic surf zone. As such, large shore break, sneaker waves, and stronger rip currents will be possible. Breaking waves of 12 to 16 feet are expected at exposed beaches and up to 18 ft at favored break point. Spring tides will also increase the currents and bring higher tides than normal. Waves can sweep across the shoreline without warning, pulling people into the sea from beaches, jetties, and rocks. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water if you're not an experienced swimmer to avoid hazardous surf and never turn your back on the ocean! There may be a lull in wave activity midweek, but longer range forecasts show additional swells impacting the coast next weekend.

Coastal Flood Advisory:

A combination of high astronomical tides and thermal expansion from warmer than normal water will result in tidal flooding concerns across Bayshore locations in the San Francisco, San Pablo, and Monterey Bays. At the San Francisco tide gauge, high tide is expected to be 1.6 ft above normal (7.4 ft MLLW) at 10:35 AM Monday 11/9, 1.5 ft above normal (7.3 ft MLLW) at 11:04 AM Tuesday 11/10, 1.4 ft above normal (7.2 ft MLLW) at 11:35 AM Wednesday 11/11, 1.4 ft above normal (7.2 ft MLLW) at 12:10 PM Thursday 11/12, 1.2 ft above normal (7.0 ft MLLW) at 12:49 PM Friday 11/13. These predictions include up to 1.5 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively. In addition, long-period swell will create hazardous conditions along the Pacific coast beaches with an increased risk of sneaker waves and rip currents.

These Spring Tides are due to a new moon on Monday, which is much lower in the sky this time of year compared to a full moon. In 2 weeks, the astronomical tides will be about 0.8' higher than this round, and the total water level could be more than a foot higher if we get SW winds and/or lower pressure. This combination would bring the total water level near the 1% annual exceedance probability (2.85' above normal), or a 1 in 100 year event. Something to keep an eye on for the week of Thanksgiving.

Sarment/Flynn/MM

MTR WATCHES/WARNINGS/ADVISORIES

CA...Beach Hazards Statement from 3 PM PST this afternoon through this evening for CAZ006-505-509-529-530.

Coastal Flood Advisory from 3 PM this afternoon to 4 PM PST Friday for CAZ006-506-508-530.

Coastal Flood Advisory from 3 PM this afternoon to noon PST Tuesday for CAZ505-509-529.

PZ...Small Craft Advisory from 3 PM this afternoon to 9 PM PST this evening for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.