Marine Weather and Tide Forecast for Mountain House, CA

SHORT TERM
Issued at 120 PM PDT Mon Mar 9 2026 (This evening through Tuesday)

Another pleasant day across the region this afternoon under mostly sunny skies. Temperatures are forecast to warm into the lower 60s near the coast and into the mid 70s across the interior. However, these temperatures are still some 3-10 degrees above seasonal averages. Tonight, there is moderate confidence for low clouds to return to the Monterey Bay region and coastal areas late this evening and linger into early Tuesday morning. Elsewhere, mostly clear sky conditions are forecast to prevail. Thus, Tuesday morning's low temperatures are forecast to largely be in the lower 40s (North Bay Valleys) to upper 40s regionwide.

For Tuesday afternoon, expecting slightly cooler temperatures than today as a weak dry frontal boundary sags southward across the region. However, temperatures will be closer to normal with low 60s near the coast and upper 60s to lower 70s across the interior.

LONG TERM
Issued at 120 PM PDT Mon Mar 9 2026 (Tuesday night through next Sunday)

The warming trend will begin on Wednesday as high pressure from the west begins to build into the region. The warming trend is anticipated to continue into this weekend and potentially even into early next week. By Sunday and Monday, temperatures in the warmest interior spots have a 50%-90% probability of exceeding 90 degrees F.
These temperatures would be 15-25 degrees above seasonal averages if they were to materialize. However, we are not anticipating any strong offshore winds with this event as the center of the high pressure builds right overhead.

Overnight and early morning temperatures will also warm into the upper 40s to middle 50s Friday and Saturday mornings. These values warm into the mid-to-upper 50s by Sunday morning. As such, we are currently forecasting Moderate HeatRisk across much of the region this upcoming weekend. As such, no rain chances are expected through the next 7 days and potentially through the next 14 days. Stay tuned as we refine the forecast throughout the remainder of the week and into the weekend.

AVIATION
(18Z TAFS)
Issued at 1033 AM PDT Mon Mar 9 2026

MVFR to VFR across the region this morning, clearing to VFR late morning. Northwesterly winds will increase once again this afternoon before diminishing after sunset and more so into early Tuesday morning. Moderate confidence for MVFR ceilings to return to the Monterey Bay Terminals late this evening and into early Tuesday morning before giving way to VFR conditions by mid morning on Tuesday. There is the potential for LIFR to IFR conditions both in the North Bay and Monterey Bay Terminals just before sunrise, however confidence remains low at this time.

Vicinity of SFO...VFR. Northwesterly winds will increase this afternoon with gusts up to 25 knots through early evening. Winds ease slightly overnight, yet look to remain out of a northwesterly direction.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...IFR at KMRY, VFR returning to KSNS.
Northwesterly winds will increase this afternoon with VFR conditions. Moderate confidence for MVFR ceilings to return late this evening and persist into mid morning on Tuesday. There is also the potential for LIFR/IFR ceilings/visibilities at both sites early Tuesday morning, yet confidence remains low at this time.

MARINE
(Today through Saturday)
Issued at 1033 AM PDT Mon Mar 9 2026

Hazardous conditions from strong to near gale force northerly breezes are expected through Wednesday morning. Frequent gale force gusts are expected across the outer waters and along the coastal jet region of Point Reyes. As a result, very rough seas will build in the outer waters. Conditions will slightly improve beginning Wednesday afternoon, but rough seas and fresh to strong northerly breezes will keep hazardous conditions around through the week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay.

Gale Warning until 3 PM PDT Tuesday for Pt Arena to Pt Reyes 0- 10 nm.

Small Craft Advisory until 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.

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