Marine Weather and Tide Forecast for El Granada, CA

SHORT TERM
Issued at 209 PM PDT Tue Jul 15 2025 (This evening through Wednesday)

Widespread stratus to return again tonight as the marine layer holds steady around 2000 ft in part thanks to persistent upper level troughing over the West Coast. Quite a few coastal sites (Half Moon Bay, Laguna Seca, Bodega Bay, Point Reyes) reported at least a hundredth of an inch of drizzle this morning. Coastal areas can expect to see patchy drizzle (similar to today) and fog again tomorrow morning as low level clouds move in overnight.

In terms of temperatures, today marked the beginning of a slight cooling trend with seasonal to below normal temperatures to continue through the end of this week. Temperatures across the interior are forecast to be between 5 to 10 degrees below normal tomorrow with highs largely in the 70s to 80s across the interior. Far interior East Bay (Byron area) and far interior Central Coast (Fort Hunter Liggett, Bradley)continue to be the two hot spot regions with highs peaking in the upper 80s to possibly low 90s. Generally the below normal temperatures and deeper marine layer are helping to mitigate fire weather concerns for the lower elevations, but for areas above the marine layer (~2000+ ft in elevation) dry conditions continue with only minor improvements in overnight humidity recoveries/daytime humidity retention. Winds remain light and onshore through the period with the exception of mountain ridgetops, mountain gaps/passes, and areas where terrain funneling is able to occur (valleys). Diurnally breezy conditions are expected across these areas with gusts to around 25 mph anticipated. The breeziest conditions will be in the vicinity of the Altamont Pass where gusts will peak closer to 30 to 35 mph.

LONG TERM
Issued at 209 PM PDT Tue Jul 15 2025 (Wednesday night through next Monday)

Not too many changes in the Long Term forecast, weak upper level troughing will generally keep temperatures below normal through Thursday with highs in the upper 70s to mid 80s. A slight warming trend begins Friday into the weekend as our persistent upper level trough weakens and is forced northward towards the PNW by redeveloping high pressure over the Pacific Ocean. As the trough is pushed northward, high pressure located over the Four Corners region will expand and push into the Bay Area and Central Coast. This will result in our marine layer compressing (limiting the inward extent of stratus overnight) and allow temperatures to warm more across the interior. This will bring temperatures closer to normal across the interior with highs in the upper 70s to 80s. For far interior locations and locations above the marine layer (~2000 ft), temperatures will be seasonal to slightly above normal in the mid to upper 90s. HeatRisk concerns are minor through the end of the forecast period with good overnight cooling into the mid 50s to low 60s expected. Fire weather concerns remain minimal across the lower elevations but remain locally elevated across the higher elevations above the marine layer. Conditions dry out above 2000-2500 ft Friday through the weekend with overnight humidity recoveries between 20- 35% and daytime humidity retention between 15-25%. Winds remain onshore but are expected to be diurnally breezy through mountain gaps/passes, along ridgetops, and across areas where terrain funneling is likely (valleys). Anyone visiting the mountains should keep in mind the saying, one less spark, one less wildfire.

Temperatures start to cool again Monday, returning to seasonal to slightly below normal temperatures, as upper level high pressure weakens and a cut-off low in the Pacific Ocean tries to strengthen and push towards the West Coast. Hopefully Bay Area/Central Coast residents are not fully opposed to the relatively mild summer that we have had so far as the CPC indicates temperatures will lean below normal through the end of July.

AVIATION
(00Z TAFS)
Issued at 423 PM PDT Tue Jul 15 2025

Satellite imagery shows MVFR-IFR stratus at the immediate coast, beginning to flow into the Monterey Bay region. Breezy and gusty onshore winds will continue into the evening hours, when winds become light and the stratus will move inland with generally MVFR- IFR ceilings expected. Stratus retreat to the immediate coast Wednesday morning, with breezy onshore winds resuming in the afternoon.

Vicinity of SFO... VFR conditions with breezy west-southwest winds gusting to 25 knots continue through the evening hours. Winds will abate overnight as MVFR-IFR stratus comes over the terminal. Stratus mixes out through Wednesday morning, followed by a resumption of the breezy west-southwest winds in the afternoon and evening hours. Low to moderate confidence of stratus returning to the terminal towards the end of the TAF period, but there is greater confidence in stratus impacts shortly afterwards.

SFO Bridge Approach... Similar to SFO.

Monterey Bay Terminals... MVFR ceilings have developed at SNS as coastal stratus flows into the region. Expect MRY to see similar ceilings over the next couple of hours, descending to IFR-LIFR through the course of the night. Stratus will mix out through Wednesday morning. Breezy onshore flow continues through the evening hours, resuming on Wednesday afternoon.

MARINE
(Tonight through next Sunday)
Issued at 423 PM PDT Tue Jul 15 2025

A gentle to moderate northwesterly breeze will prevail through Saturday. Seas will abate to become moderate by Wednesday with some rebuilding to become rough in the outer waters by Saturday.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...None.