textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1146 PM PDT Tue Jun 30 2026

- Seasonally cool temperatures and breezy afternoon winds will continue through Thursday.

- Gradual warming trend late this week and into the weekend, bringing pleasant conditions for the holiday weekend.

SHORT TERM

Issued at 1146 PM PDT Tue Jun 30 2026 (Tonight through Thursday)

Longwave trough over the western CONUS will remain in place through Wednesday, with weak bouts of energy passing through the flow at 500 hPa. This pattern has been persistent over the last week, which has allowed the marine layer to be locked in place and kept temperatures below seasonal norms along the coast. As has been seen over the last few days, temperatures will continue to be in the upper 50s to 60s along coastal communities, with those inland in the 70s to mid 80s. Marine layer will slowly erode along coastal areas from north to south by midday, especially for areas north of the Monterey Bay Area. Although, communities located along Monterey Bay should largely remain locked under the marine layer through much, if not all, of the day. Some breaks in the clouds may allow the sun to break through briefly at times. We will also continue to see breezy conditions through the afternoon as weak bouts of energy continue to pass through the broad upper trough.

LONG TERM

Issued at 1146 PM PDT Tue Jun 30 2026 (Thursday night through next Tuesday)

We will continue to fall under the influence of the long wave trough on Thursday, bringing another day of cool and breezy conditions under the marine layer along the coast. Warmer temperatures and mostly clear skies will remain inland.

Friday onward, we will start to see this long wave pattern break down over the area. We will also start to see some weak ridging develop going into the weekend. Thus, we will start to see a gradual warming trend through the weekend. Temperatures for communities along the coast will largely remain in the mid 60s to near 70, with more notable warming noted for inland areas. This will be especially true for inland areas south and east of the Monterey Bay Area where temperatures in the upper 80s to low 90s will be seen. As a result, HeatRisk along the coastal communities will remain low (green), while inland areas will be minor (yellow). As was mentioned in the last forecast package, guidance is hinting at the potential for another long wave trough to develop over the western CONUS. Although, CPC continues to highlight the area under favorability for above normal temperatures into the middle of next week, potentially bringing more summer-like weather to the area.

AVIATION

(06Z TAFS) Issued at 950 PM PDT Tue Jun 30 2026

MVFR CIGs last along the coast and around the Monterey Bay. The breezy winds across the area will reduce into the night, becoming light to moderate. CIGs fall to IFR levels in the late night at MRY and along portions of the immediate coast, with some IFR CIGs forming at APC. Cloud cover erodes at APC in the mid morning with other sites seeing clearing in the late morning and early afternoon, leading to widespread VFR. Winds build again into Wednesday afternoon, but only to moderate to breezy levels.

Vicinity of SFO...VFR through the TAF period. Breezy west winds reduce into the night, and become light by the early morning as scattered low clouds move through the area. Cloud cover thins into the mid morning as winds become more moderate. Expect winds to increase further in the mid afternoon, peaking around 16 kts before become light again into the night. Wednesday night stratus is expected to get close to SFO once again.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...MVFR CIGs continue to affect the terminals this evening. MRY CIGS looks to fall to IFR levels in the early morning as winds continue to reduce. CIGs erodes in the late morning and early afternoon around the Monterey Bay as moderate winds build. There is still some uncertainty on the clearing at the immediate coast, a repeat of Tuesday is still possible.

MARINE

(Tonight through next Monday) Issued at 950 PM PDT Tue Jun 30 2026

Strong northerly winds continue for the northern outer waters while weaker, yet still gusty winds affect the rest of the waters. Frequent gale force gusts are expected across the northern outer waters through Wednesday, a bit weaker winds for Thursday and Friday. Moderate northerly to westerly breezes will prevail elsewhere. Rough to very rough seas will continue through Wednesday before abating to become moderate to rough Thursday into Friday.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory until 3 AM PDT Thursday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm.

Small Craft Advisory until 9 AM PDT Wednesday for Pt Reyes to Pigeon Pt 0-10 nm.

Gale Warning until 3 AM PDT Thursday for Pt Arena to Pt Reyes 10- 60 NM.