Marine Weather and Tide Forecast for Moss Beach, CA

UPDATE
Issued at 907 AM PDT Thu Oct 8 2026

Fog has begun to lift across coastal locations of the North Bay, San Francisco, and the San Francisco Peninsula this morning.
However, areas of dense fog persist around the Monterey Bay and adjacent inland zones. Thus, have extended the Dense Fog Advisory through 10 AM in these areas with the anticipation of daytime heating to take over and improve visibilities. Otherwise, the Heat Advisory remains in effect for the interior through 10 PM this evening for all areas away from the immediate coastline.

RGass

SHORT TERM
Issued at 1155 PM PDT Wed Oct 7 2026 (Tonight through Sunday)

Strong 500 mb high pressure ridging bringing inland areas hot and dry weather will continue into Thursday. Well above early October normal temperatures occurred again today, though none of the long term stations set any new record highs today. The Heat Advisory (WMO header WWUS76) for inland areas continues through 10 pm PDT Thursday. And a reminder there is a Coastal Flood Advisory (WHUS36) for anomalous high tides with up to 1.2 feet of inundation above ground level in low-lying areas.

As mentioned it'll be hot again inland Thursday while cooler temperatures will prevail along the immediate coastline within a compressed marine layer. NBM forecast highs were nudged downward slightly for much of the immediate coastline for Thursday. Global models continue to indicate a major pattern shift will take place over the western states beginning later tomorrow through Friday.
A weak 500 mb low ~ 900 miles to our west will progress toward our forecast area allowing part of the aforementioned 500 mb high pressure ridge to slip westward (retrogressing) far to our west.
Separate strengthening 500 mb troughing will take place over the Pacific Northwest; long wave troughing will begin to replace long wave ridging over the west. Mid-latitude amplification and winds will move the 500 mb trough southward, decidedly shifting the pattern south and east including the near term weak 500 mb low just out ahead of it and the rest of the 500 mb ridge. This pattern shift will bring in much cooler air from the surface up through 500 mb across the forecast area through the weekend.

Winds will become gusty over the coastal waters and gap winds will increase as well during the weekend, both Saturday and perhaps Sunday with gusts possibly nearing wind advisory level in the usual wind favored gaps across the San Francisco Peninsula and the East Bay.

LONG TERM
Issued at 1155 PM PDT Wed Oct 7 2026 (Sunday night through next Wednesday)

Winds over land diminish later Sunday. There may be some residual moisture the cold core low will tap producing a few showers over the southern forecast area later Sunday and Monday. Otherwise dry and much cooler weather is forecast later Monday, Tuesday and Wednesday. Daytime highs and lows will shift to below normal.
Daytime highs will generally be in the 60s coast to the 70s inland. Night-time and morning lows will mostly be in the 40s except around 50 at the coast and as cold as the 30s far inland valleys.

AVIATION
(18Z TAFS)
Issued at 1037 AM PDT Thu Oct 8 2026

Patchy fog and LIFR stratus lingers at the immediate coast with the rest of the region remaining VFR through the daytime. A gentle to moderate onshore pattern wind develops in the afternoon and evening hours. This evening and tonight, the marine layer is expected to rebuild and thicken as large scale ridging moves eastwards, allowing for some improved inland expansion of the stratus deck. Forecast confidence is moderate for stratus extent and ceiling heights, but expect some inland development into the North bay valleys, SF Bay, and Salinas Valley overnight. Stratus begins to retreat back to the coastal regions Friday morning.

Vicinity of SFO... Moderate confidence for VFR conditions through the TAF period with some scattered clouds possible late tonight.
Higher confidence in stratus impacts at OAK. Moderate west-northwest winds will develop in the afternoon and evening hours, with light winds overnight into the morning.

SFO Bridge Approach... Similar to SFO

Monterey Bay Terminals... Lingering fog and LIFR stratus is expected to lift imminently at MRY but potentially persist through the afternoon along the immediate coast. Otherwise VFR conditions remain prevalent through the day with gentle to moderate northwest winds in the afternoon hours. IFR-LIFR stratus develops this evening with moderate confidence for fog, not expected to clear out until the TAF period ends on Friday morning, or shortly thereafter.

MARINE
(Today through Tuesday)
Issued at 907 AM PDT Thu Oct 8 2026

Moderate to fresh northwesterly breezes and moderate seas will prevail today. Conditions deteriorate Friday and into the weekend as northerly breezes increase to become strong to near gale across the coastal waters, Monterey Bay, and through the Golden Gate Gap. Gale force gusts are expected across the northern outer waters and the coastal jet region of Point Reyes. These winds will build rough to very rough seas. Long period southerly swell arrives Friday, with long period northwesterly swell arriving Sunday, creating a confused sea state.

FIRE WEATHER
Issued at 428 AM PDT Thu Oct 8 2026

Hot and dry conditions will lead to elevated fire weather conditions across the interior and higher terrain Thursday. Temperatures 10 to 20 degrees above normal and poor minimum relative humidity will continue away from the compressed marine layer at the coast Thursday. The higher terrain will experience active thermal belting, little-to-no recovery with nocturnal drying across the highest peaks, and thus prolonged burn periods. Winds remain the limiting factor, with diurnal winds prevailing except for light northerly/offshore flow overnight across the higher terrain. Even though conditions become cooler and more humid Friday, windier conditions will keep elevated fire weather conditions across the interior and higher terrain through Friday.

Sarment

MTR WATCHES/WARNINGS/ADVISORIES
CA...Coastal Flood Advisory from 9 AM Friday to 3 PM PDT Tuesday for CAZ006-508-529-530.

Heat Advisory until 10 PM PDT this evening for CAZ503-504-506- 508-510-512>518.

Coastal Flood Advisory until 4 PM PDT Wednesday for CAZ506.

PZ...Small Craft Advisory from 3 AM to 3 PM PDT Friday for Pt Arena to Pt Reyes 10-60 NM.