Marine Weather and Tide Forecast for Foster City, CA

SHORT TERM
Issued at 1216 AM PDT Tue Apr 14 2026 (Today and tonight)

The upper level low that brought beneficial rainfall the past few days has exited east with lingering low clouds overnight from the SF Peninsula south into Monterey and the Salinas Valley, and farther inland over the interior mountains of San Benito County. Low clouds will linger across the Bay Area and Central Coast through mid- morning today as a drier mid-level airmass filters in across our area under shortwave ridging aloft, with mostly sunny skies in the afternoon into the evening hours. High temperatures will begin their gradual increase through midweek today, with only slight increases from Mondays highs. Tonight into Wednesday morning will still be on the chilly side of normal with mostly clear skies, relatively light winds, and more efficient radiational cooling.

LONG TERM
Issued at 1216 AM PDT Tue Apr 14 2026 (Wednesday through Monday)

Temperatures on Wednesday will be similar or slightly higher on the backside of the progressive shortwave ridging. By Wednesday afternoon, onshore flow will increase out ahead of a sharpening trough that will bring gusty winds and a slight chance of rain across northern portions of the North Bay. The better fetch of onshore flow out ahead of the upper trough and associated surface boundary will be short lived but will produce more widespread cloud cover during the day and evening hours. Onshore flow will quickly transition to north/northeast offshore flow overnight into Thursday in the wake of the progressive upper trough. The gusty winds during the day Thursday, especially above 1000ft are not expected to exceed 40 MPH with little impacts. Winds ease Friday, while a still progressive but high amplitude ridge moves onshore producing a more notable jump in temperatures Friday and Saturday to slightly above normal for most locations. The active, progressive longwave pattern continues by the end of the weekend into the beginning of next week with an increasing signal for another round of widespread beneficial rainfall.

AVIATION
(18Z TAFS)
Issued at 1144 AM PDT Tue Apr 14 2026

Low level lift and ample moisture led to a strato-cu kinda day.
Onshore flow and persistent cloud feed from the Pacific will keep a mix of MVFR (2000-3000 FT CIGS) to VFR through the 19-20Z time period. It will take some time, but do expect mostly VFR this afternoon with a few lingering CU. Tonight will be lower conf given lingering low moisture increasing high level clouds. For STS/APC did not include dense fog like this AM....thinking increasing high clouds will limit radiational cooling (10-20% chc). For the Wed AM rush do have some MVFR CIGS returning 1500-2500 FT. Winds are forecast to increase throughout the day into the evening before tapering down through the night. HAF is an exception as it will maintain moderate winds with some embedded gusts through the TAF period due to its close proximity to the coastline.

Vicinity of SFO...Strato-cu is slow to mix out. Trending later in the 19-20Z block for the Bay. Do expect an uptick with onshore winds this afternoon with better clearing. Gusts 20-25 kt.

SFO Bridge Approach...Solid deck of strato-cu. May clear a little later than SFO terminal.

Monterey Bay Terminals...Gradual thinning of strato-cu with similar clearing in the 19-20Z. Onshore flow will bring some MVFR cigs back again tonight.

MARINE
(Today through Sunday)
Issued at 1059 AM PDT Tue Apr 14 2026

High pressure off the California coast will maintain moderate to fresh northerly breezes over the coastal waters today. Locally stronger gusts will occur near Point Reyes and Point Sur regions.
A cold front will increase winds to near gale force late Wednesday or early Thursday, building rough seas. Winds and seas ease into the weekend, but build again into the next work week with some chances for rain.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this evening for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm.

Small Craft Advisory from 9 PM Wednesday to 3 AM PDT Thursday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

Small Craft Advisory until 3 AM PDT Wednesday for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Wednesday for Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory from 3 PM Wednesday to 3 AM PDT Thursday for Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Thursday for Pt Pinos to Pt Piedras Blancas 0-10 nm.