FXUS66 KMTR 272310 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 410 PM PDT Mon Oct 27 2025 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 1248 PM PDT Mon Oct 27 2025 - Pleasant weather through the week - Mild offshore flow through Wednesday morning - Temperatures near or slightly above seasonal averages through the weekend && .SHORT TERM... Issued at 1248 PM PDT Mon Oct 27 2025 (This evening through Tuesday) Satellite imagery shows lingering stratus across the South Bay. Current thinking is for the cloud cover to last for another couple of hours. After the stratus mixes out, the skies should remain clear through the day and the overnight hours, straight through Tuesday. The weather pattern is in transition today, as zonal flow (west to east winds) aloft this morning gives way to a building ridge that will dominate the weather pattern for the rest of the week. Today's highs remain cool with the inland valleys reaching temperatures in the lower 70s, with areas along the Bays going into the upper 60s and the Pacific coast seeing highs in the lower to middle 60s. After a cool morning with lows in the middle 40s to lower 50s across most of the lower elevations, a marked warming trend begins on Tuesday as temperatures rise slightly (5 to 10 degrees) above seasonal averages, with the inland valleys seeing highs in the upper 70s to the lower 80s, the bayside regions seeing highs in the lower to middle 70s, and the Pacific coast hovering around the middle to upper 60s. The resulting thermal trough over California will combine with a surface high developing over the northern Rockies to produce mild offshore flow, with light winds from the north and the northeast across the higher elevations. The relatively light wind speeds will keep fire weather concerns in check. && .LONG TERM... Issued at 1248 PM PDT Mon Oct 27 2025 (Tuesday night through next Sunday) The offshore flow persists into Wednesday morning, with a peak in the temperatures that day as the inland valleys reach the lower to middle 80s. Temperatures reach the 10-15 degree above seasonal average mark and minor HeatRisk is possible, corresponding to a slight risk of heat related illness for people highly sensitive to heat. An incoming trough in the northern tier will restore mainly onshore flow and cause temperatures to dip across much the region, with the inland valleys across the Bay Area seeing highs in the lower to middle 70s and the Bay Area Pacific coast dipping to near 60 while the interior Central Coast continues to see highs in the 80s. Enhanced cloud cover is possible, but any rain chances remain far to our north across the Pacific Northwest. Temperatures will quickly rebound and return to the 5-10 degree above seasonal average bracket for the upcoming weekend, with CPC outlooks suggesting that temperature above seasonal averages continue into the first week of November. && .AVIATION... (00Z TAFS) Issued at 409 PM PDT Mon Oct 27 2025 Currently VFR at all terminals with not a cloud in the sky. High confidence in VFR through the TAF period. After the afternoon sea breeze is lost, winds will likely become variable to some degree with northerly/offshore flow prevailing. Vicinity of SFO...Currently VFR with northwesterly flow. High confidence in VFR prevailing through the TAF period. Winds will back through the TAF period. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Currently VFR with westerly flow at both terminals. High confidence in VFR prevailing through the TAF period. && .MARINE... (Tonight through next Saturday) Issued at 409 PM PDT Mon Oct 27 2025 Moderate to fresh northerly breezes will continue through the week with near- gale force gusts for the outer waters and coastal jet region of Point Sur. Seas will be moderate through the forecast period. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 9 PM PDT this evening for Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory until 3 AM PDT Tuesday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm. Small Craft Advisory until 9 AM PDT Tuesday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory from 9 PM Tuesday to 3 AM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...DialH LONG TERM....DialH AVIATION...Sarment MARINE...KR Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea