textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1226 PM PDT Sun Oct 25 2026

- Minor coastal flooding at high tide for Bayshore and Pacific Coast locations through much of the week

- Cool conditions through the week

- Rain chances late week into the upcoming weekend

SHORT TERM

Issued at 1226 PM PDT Sun Oct 25 2026 (This evening through Monday night)

High cloud cover is streaming in from the west/northwest in advance of an approaching frontal system (largely expected to remain north of the region). As such, temperatures this afternoon will peak in the mid to upper-60s near the coast and low to mid-70s for inland areas away from the immediate coast and the interior.

Tonight and into Monday morning, expecting the aforementioned frontal boundary to push inland over northern California brining a slight chance for very light rain to the northern offshore waters and the Sonoma County coastline. Temperatures are forecast to cool into the lower 40s across the North Bay Valleys and far southern portions of the Salinas Valley Monday morning with the rest of the region expecting upper 40s to low 50s.

Temperatures cool some 5-10 degrees on Monday as a cooler air mass spreads southward across the region in response to the mid/upper level low pushing into the Pacific Northwest.

LONG TERM

Issued at 1226 PM PDT Sun Oct 25 2026 (Tuesday through next Saturday)

Below normal temperatures are forecast to persist through midweek as the region with zonal flow to troughing persisting over the West Coast. However, dry conditions are forecast to prevail through midweek. It isn't until Friday and the upcoming weekend that we see rain chances return to the region as a cold front moves through Friday and into Saturday. There is low to moderate confidence of this occurring. However, there is still time for things to change so don't cancel your tick-or-treating plans yet!

Again, the most pressing threat this week will be minor to moderate coastal flooding along bayshore locations of the San Pablo, San Francisco, and Monterey Bays. The Pacific Coast gets added to the Coastal Flood advisory beginning Monday as we are expecting up to 1.9 feet of inundation above ground level. This is due to thermal expansion of the warm waters generated by El Nino and astronomical high tides through much of the upcoming work week.

AVIATION

(06Z TAFS) Issued at 937 PM PDT Sun Oct 25 2026

High clouds will steadily clear out to the east tonight. Patchy low clouds /MVFR-IFR/ are developing over the coastal waters and along the coastline. Nocturnal radiative cooling will strengthen and combine with surface to lower level convergence out ahead of a weak cool front moving in from the northwest, the front arrives Monday.

The potential is there for ongoing low cloud /MVFR-IFR/ development tonight and Monday morning. Diurnal warming and mixing will result in mainly VFR across the forecast area late Monday morning and afternoon.

Vicinity of SFO...VFR with a west wind diminishing tonight and Monday morning. Low confidence forecast for tempo low clouds /MVFR/ 08z-12z then prevailing MVFR to 19z Monday. West wind increasing to 15 to 25 knots Monday afternoon to mid evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Low clouds /MVFR-IFR/ developing tonight and Monday morning ahead of a weak cool front arriving from the northwest on Monday. VFR is forecast late morning and afternoon Monday, VFR possibly extending into Monday evening. Winds light and variable tonight and Monday morning, then west to northwest 10 knots late Monday morning through early evening.

MARINE

(Tonight through next Saturday) Issued at 919 PM PDT Sun Oct 25 2026

Gentle north to northwest breezes will become moderate to fresh early this week. Strong gusts increase across the southern coastal waters near Point Sur and Monterey Bay by Monday afternoon, with some isolated near gale force gusts. Moderate seas of 4 to 5 ft continue for offshore waters, but will build to 6 to 8 ft seas Monday into Tuesday. Slight seas of 2 to 4 ft hold the immediate coastline and build to moderate 4 to 6 ft for Monday.

MTR WATCHES/WARNINGS/ADVISORIES

CA...Coastal Flood Advisory until 3 PM PDT Thursday for CAZ006-506- 508-529-530.

Coastal Flood Advisory from 9 AM Monday to 3 PM PDT Thursday for CAZ505-509.

PZ...Small Craft Advisory from 3 PM to 9 PM PDT Monday for Mry Bay.

Small Craft Advisory from 3 PM Monday to 3 AM PDT Tuesday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm.