Marine Weather and Tide Forecast for Rollingwood, CA

UPDATE
Issued at 858 AM PDT Thu Jul 17 2025

Another cool start to the morning with most locations across the region in the 50s to 60s this morning. The 12Z OAK sounding shows the marine layer is still around 2000 feet with widespread stratus across the Bay Area and Central Coast. The marine layer will start to compress tonight with coastal drizzle chances becoming more limited Friday morning. Temperatures remain below normal today before a slight warming trend begins tomorrow. No major changes to the overall forecast, the warming trend will bring back more seasonal temperatures with high temperatures peaking on Sunday in the 80s to low 90s across the interior. Confidence continues to grow that below normal temperatures will return Monday as another upper

SHORT TERM
Issued at 240 AM PDT Thu Jul 17 2025 (Today and tonight)

We're more than halfway through the month and "No Sky July" remains locked in. Current overnight satellite fog product shows another robust marine layer blanketing the coastal waters and inland valleys. Fort Ord profiler indicates the depth of the marine layer actually increasing a little since Wednesday. The slight deepening is likely due to a weak/subtle upper level shortwave trough over NorCal coast. The deeper marine layer was just enough to hamper another "drizzle-fest" along the coast.
We've had one gage tip since midnight, which is less than 24 hours ago. That being said, will still carry some patchy drizzle in the forecast for the coast Thursday morning. Morning clouds will give way to inland sunshine. Despite some inland sunshine temperatures will still be seasonably cool for July with highs reaching the upper 50s to near 70 for the coast and 60s to lower 90s inland -- or about 5 to 10 degrees below normal for July.
Speaking of below normal - July 1 through July 16 has shown high temperatures on average are 1 to 3 degrees below normal. Who remembers July of 2024? If you do, it was so much warmer than 2025. Temperatures on average for the whole month of July were 2 to 4 degrees warmer than average with inland areas 6 to 8 degrees warmer.

Expect similar conditions again Thursday night into Friday - solid marine layer with some patchy coastal drizzle.

Previous discussion highlighted fire weather concerns above the marine layer and those concerns remain early Thursday morning.
Dry and mild conditions remain at 2000 feet and above with temperatures in the 60s to lower 70s with poor humidity less than 30%.

LONG TERM
Issued at 328 AM PDT Thu Jul 17 2025 (Friday through Wednesday)

While we're talking about seasonably cool July so far we will see some warming in the long term. Interesting longwave pattern over CA Friday and into the weekend. Two upper lows continue to spin with one retrograding off the NorCal coast and the other is move through N Baja/SoCal. In between is a squeezed upper level ridge.
This ridge will result in higher 500mb heights, warmer 850mb temps, and a slightly more compressed marine layer. As such, a slight uptick in temperatures can be expected Friday and over the weekend. Temperatures through this period will warm 3 to 5 degrees each day with far inland areas reaching the mid to upper 90s. Daytime temperatures will warm, but overnight will see some relief limiting HeatRisk impacts for the region.

The warm up comes to an end early next week as another upper level trough/low takes aim at NorCal. Expect the marine layer to deepen once again. One other fall out from the trough will be increasing northerly winds. Cool and winder conditions will linger through at least Wednesday.

AVIATION
(18Z TAFS)
Issued at 1042 AM PDT Thu Jul 17 2025

Generally MVFR where low clouds persist this morning while inland areas continue to clear out. The remainder of the TAF sites will clear out between 18Z-20Z, with the exception of HAF where low ceilings may persist through much of the day. Onshore winds increase this afternoon before easing after sunset. High confidence for IFR/MVFR ceilings to return either by late this evening across the Monterey Bay terminals and then early Friday morning for Bay Area terminals. Ceilings will begin to lift around 18Z-20Z Friday for inland areas with another increase in onshore winds by Friday afternoon.

Vicinity of SFO.. MVFR currently with conditions expected to return to VFR between 18Z-20Z. Westerly to northwesterly winds increase this afternoon before easing late in the night. High confidence for MVFR ceilings to return by early Friday morning and will persist through about 18Z-20Z Friday.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals.. MVFR currently with clearing conditions between 18Z-20Z. However, moderate confidence for clearing to occur with low high confidence for IFR/MVFR ceilings to return this evening. Onshore winds will increase this afternoon before easing after sunset. LIFR conditions will be possible across the terminals early Friday morning before lifting by late morning.

MARINE
(Today through Tuesday)
Issued at 1042 AM PDT Thu Jul 17 2025

Expect a light to moderate westerly or northwesterly breeze across the majority of the coastal waters through this weekend.
Gusty winds, potentially hazardous to small craft, develop each afternoon and evening through the Golden Gate and into the Delta as well as the favored coastal jets along Pigeon Point and Big Sur. Moderate seas also continue through the remainder of the forecast period.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 9 AM to 9 PM PDT Friday for SF Bay N of Bay Bridge.

Small Craft Advisory from 3 PM to 9 PM PDT Friday for Pigeon Pt to Pt Pinos 0-10 nm.

Small Craft Advisory from 3 PM Friday to 3 AM PDT Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.