Swell Matrix

Area Forecast Discussion

National Weather Service San Francisco CA

525 am PST Mon Jan 26 2026

Short Term

, Issued at 325 AM PST Mon Jan 26 2026 (Today and tonight)

Progressive short wave troughing today will give way to progressive ridging tonight with the ridge axis shifting east of our area by early Tuesday morning. Patchy fog is expected to develop overnight in portions of the North Bay, East Bay and South Bay with coverage or duration not expected to necessitate an advisory attm. Southerly boundary layer winds combined with weak offshore surface winds will help lift temperatures a few degrees across the interior from Sundays highs, remaining right around the same along the coast. Cloudy skies this morning will give way to a mix of Sun and clouds this afternoon, especially inland further helping the modest temperature increases.

Long Term

..issued at 325 AM PST Mon Jan 26 2026 (Tuesday through Sunday)

Extended forecast remains on track with rain chances increasing Tuesday evening, continuing through Wednesday morning. HiRes HRRR/RRFS focus primarily on the North Bay struggling to reach 0.10" with NBM PoPs possibly a little overdone with chances to the south as the best lift associated with the surface boundary continuing to shift north of our area. Drier conditions will persist for the remainder of the week with persistent ridging while the signal for another round of scattered light beneficial rain next weekend beginning to fade while temperatures trend warmer for the weekend, especially across the Central Coast.

Aviation

(12z TAFS) Issued at 420 AM PST Mon Jan 26 2026

VFR through the TAF period for all sites but STS and LVK which will see spotty fog into the mid morning. High clouds continue to move through the region, but thin into the afternoon. Winds will mostly say light through the TAF period with wind directions being determined by mostly localized effects.

Vicinity of SFO, VFR through the TAF period. Expect mostly light to moderate northeast winds through the afternoon. Winds become lighter into the evening night, before moderate southeast winds build early Tuesday.

SFO Bridge Approach, Similar to SFO.

Monterey Bay Terminals, VFR through the TAF period. Light winds affect MRY through the forecast. Winds stay east to southeast through the morning and into the afternoon, with more moderate winds possible at SNS. Lighter west to northwest winds build in from the bay in the mid to late afternoon, but winds look to turn easterly in the early night. East-southeast winds build in the late night at SNS, becoming more moderate.

Marine

(today through Saturday) Issued at 325 AM PST Mon Jan 26 2026

Mostly light winds continue to affect the waters with more moderate to breezy winds north of Point Reyes. Winds diminish on Wednesday and switch to northerly that night . Moderate seas will prevail through Tuesday. Conditions deteriorate Wednesday as seas build to become rough to very rough. Additionally, a weak passing storm system will bring light rain to the coastal waters early Tuesday morning through Wednesday morning.

Watches, Warnings, Advisories

Ca, None. PZ, None.

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