Marine Weather and Tide Forecast for Livermore, CA

UPDATE
Issued at 824 PM PDT Mon Jun 8 2026

The band of showers that currently extends from the Santa Cruz Mountains over to the East Bay has been overperforming so far this evening, with public reports of drizzle across the Bay Area, centered mainly on favored locations in the foothills. As a result, have added a chance for drizzle along the coastal and higher elevation locations across the Bay Area into Santa Cruz County through the night, but note that accumulations are still very light with rain totals generally a few hundredths of an inch outside the move favored locations.

DialH

SHORT TERM
Issued at 320 PM PDT Mon Jun 8 2026 (This evening through Tuesday)

A disturbance will continue to track through the PacNW through tomorrow morning. So far, this has spread high clouds across the region with radar showing light returns over the North Bay. Looking at sounding data, profiles have moistened some, but favor a drier air mass. As the system progresses and a front approaches, we could see this interact with the marine layer later this evening and into Tuesday morning. This would result in coastal drizzle and perhaps even some light rain/coastal drizzle for the northwestern portion of Sonoma County. The front is expected to pass across the region Tuesday morning, with drier air working in behind it. Skies will begin will clear behind the front, which will kick off the warming trend for the week. Highs for Tuesday will be in the mid 70s to mid 80s for interior valley locations and for the interior mountains.
Along the coast, temperatures will range from the upper 50s to low 70s.

LONG TERM
Issued at 320 PM PDT Mon Jun 8 2026 (Tuesday night through next Sunday)

The upper level pattern begins to change on Friday as high pressure builds over the Eastern Pacific, while troughing sets up over the west. This will lead to a stretch of warmer and drier weather through the rest of the forecast period. Some uncertainty remains in a few areas, such as where does the upper low go? The latest guidance continues to favor a inside slider type upper level trough, leading to offshore flow for our neck of the woods Wednesday through Thursday morning. The strongest winds look to occur over the interior North Bay region and along the East Bay and the Santa Clara Hills, where gusts up to 35-55mph are expected over favored ridges, gaps, and passes.

On Thursday, ridging builds in ever so slightly leading to the warmest day of the week. Widespread moderate HeatRisk is expected, with temperatures rising in to the 90s for many interior valleys, with some areas even cracking 100. Along the coast, temperatures will be warm as well, ranging from the mid 60s along the immediate coast to to mid 80s inland. Warmer weather lasts into the weekend, as the ridge holds over the EPac; however, temperatures will falter a few degrees each day. There is a sign we could see the marine layer start to return Saturday or Sunday, but confidence is low on when that occurs. If there is no major synoptic change, temperatures could also trend warmer for Friday and Saturday.

AVIATION
(18Z TAFS)
Issued at 1155 AM PDT Mon Jun 8 2026

VFR through the afternoon as high level clouds begin to move across the region as the low pressure system to our northwest moves onshore. MVFR ceilings begin to fill in at terminals beginning as early as 5pm PDT today and will be widespread by sunset. Moderate westerly winds (10+ kts) prevail through the afternoon and early evening with embedded gusts in excess of 20kts. Medium to high confidence that most terminals will develop IFR ceilings overnight, except for LVK and SJC where it will remain MVFR through Tuesday morning. Winds ease overnight and may become variable at times at some sites, but will predominantly come from the west unless otherwise stated in TAF. North Bay and coastal terminals have a 20- 30% chance of experiencing some drizzle (up to 0.01 inches) this evening through the overnight hours from the approaching upper-level trough, though confidence is currently too low to include in the TAF.

Vicinity of SFO...VFR and strong gusts prevail through the day into the evening. MVFR ceilings will settle over the Bay around 5pm as westerly winds begin to ease. Ceilings will become borderline IFR- MVFR around sunset time and eventually get pushed to IFR through the overnight hours. Conditions improve back to VFR by late Tuesday morning due to mixing. High confidence in forecast.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the afternoon as westerly winds increase to moderate breezes (10-15kts). Winds diminish slightly early evening (~5pm PDT) with developing MVFR ceilings that eventually become IFR through the overnight hours. Expecting conditions to transition back to VFR by Tuesday morning.

AVIATION
(06Z TAFS)
Issued at 940 PM PDT Mon Jun 8 2026

Mid and low level clouds continue to move into the area from the northwest to the southeast. MVFR and IFR CIGs have built along the coast with the rest of the TAF sites filling into the night as winds reduce. Drizzle and light rain linger overnight in the far northern portions of the North Bay, as well as along the coast, affecting visibilities. Cloud cover begins to erode in the mid morning with widespread VFR expected Tuesday afternoon with moderate to breezy winds. Drier air moving into the area will prevent much in the way of cloud cover formation for Tuesday night, leading to continued VFR even as winds reduce that evening.

Vicinity of SFO...Moderate west winds and IFR CIGs last into the late morning. CIGs erode into the the late morning with breezy to gusty winds arriving into the afternoon as skies continue to clear. These winds reduce again into Tuesday night, but stay moderate through that night.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Winds are becoming light as IFR CIGs build around the Monterey Bay. Cloud cover begins to lift and erode in the mid morning, with VFR expected by the late morning.
Expect breezy west and northwest winds to arrive into Tuesday afternoon before becoming light again that night.



MARINE
(Tonight through next Sunday)
Issued at 940 PM PDT Mon Jun 8 2026

Breezy conditions linger in the inner waters south of Point Sur.
Expect winds to ease across the waters overnight, but northwesterly winds and seas will begin to build again Tuesday morning. This will lead to hazardous conditions for small craft to develop across the waters. Gale force gusts are expected by Tuesday night over the northern outer waters. Winds and seas begin to ease again into Thursday, and stay light through the weekend.

FIRE WEATHER
Issued at 545 PM PDT Mon Jun 8 2026

Hot temperatures, gusty north winds, and low humidities across the North Bay interior mountains will raise the fire weather threats late on Wednesday into Thursday, with a particular emphasis on the interior mountains of Napa County. Although the strongest winds will remain within the Sacramento Valley, gusts of 25 to 35 mph are expected to spread into Napa County, with stronger gusts of 40-50 mph possible along the Vaca Mountains along the county's eastern edge. Meanwhile, daytime humidity retention will be very poor with relative humidity values as low as 10-15%, while overnight recoveries are likewise poor as RH values top out at 20-30%. Thus, fuels are expected to dry rapidly, leading to the elevated fire weather concerns. It's a little too early to put out fire weather products at this stage, but this will be re-evaluated today and Tuesday as the dry conditions approach. Elsewhere across the district, conditions remain hot and dry, but we're not expecting winds to be as strong as they are across the interior North Bay.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 9 AM to 9 PM PDT Tuesday for Mry Bay- Pt Arena to Pt Reyes 10-60 NM.

Small Craft Advisory from 9 AM to 9 PM PDT Wednesday for Mry Bay.

Small Craft Advisory from 9 AM Tuesday to 9 PM PDT Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.

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

Gale Warning from 9 PM Tuesday to 9 PM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM.