, Issued at 1245 AM PDT Thu Jul 23 2026 (Today and tonight)
Patchy coastal low clouds are trying to redevelop early this morning. Higher dewpoint air lingers, however areal low cloud coverage will depend on the total amount of nocturnal radiative cooling (improved since it's drier aloft) and near surface cool air advection through morning. Putting the brakes on low cloud development so far is the recent uptick in sea surface temperatures with the loss of cold water upwelling due to the recent northward moving remnant low center passing by to our west. The buoys show sea surface temps in the upper 50s to lower 60s, about 3F to 8F above July normals. However, northwest winds (and upwelling) will resume in our coastal waters today and tonight.
High pressure aloft will continue to bring stable weather. Daytime highs today will be in the 60s/70s coastside to the 70s/80 bayside and 80s/90s inland including 90s/100 over the southern interior. Lows in the 50s to lower 60s tonight.
..issued at 1245 AM PDT Thu Jul 23 2026 (Friday through Wednesday)
A gradual turn toward less humid conditions with a slight warming trend inland develops through the weekend into next week. Onshore breezes will prevail with night and morning coastal low clouds and fog, possibly a few patches of light drizzle.
(12z TAFS) Issued at 425 AM PDT Thu Jul 23 2026
The marine layer is 1400 feet deep, and is battling some dry air. As such the stratus coverage is ragged and flight conditions are likely to change for better or worse as this mixing continues through the early morning hours. The confidence is very low with this set of TAFs, even in the short term. The clouds will retreat back to the coast late this morning with VFR conditions and moderate onshore winds through the afternoon.
Vicinity of SFO, Very tricky forecast here. Boundary layer averaged winds are from the NW, and with the compressing marine layer the terminal is getting some IFR stratus from the west, MVFR stratus from the east, and clear skies to the south. Since the terminal is at the intersection, the flight condition is liable to change quickly through the morning hours. Don't put too much trust in my TAF this morning. The clouds will clear in the late morning with strong onshore winds expected from late morning through the evening.
SFO Bridge Approach, Currently clear and very slowly filling with IFR ceilings from the north.
Monterey Bay Terminals, MRY actually reported fog for a brief period this morning, but that has lifted to a LIFR stratus deck. The marine layer is very ragged across the Monterey Bay region, but it's unlikely that MRY or SNS clear before the late morning hours.
(today through Tuesday) Issued at 425 AM PDT Thu Jul 23 2026
Moderate to fresh NW winds will continue through the weekend. Significant wave heights will remain moderate this week before long period southerly swell from Hurricane Fausto reaches the coastal waters this weekend.
Ca, Beach Hazards Statement from Saturday morning through Tuesday afternoon for CAZ006-505-509-529-530.
PZ, Small Craft Advisory from 9 AM this morning to 9 PM PDT Friday for Mry Bay.
Small Craft Advisory from 3 PM this afternoon to 3 PM PDT Saturday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm.
Small Craft Advisory from 9 AM this morning to 3 PM PDT Saturday for Pigeon Pt to Pt Pinos 0-10 nm.
Small Craft Advisory until 3 PM PDT Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
