Marine Weather Net

Point St. George to Cape Mendocino CA out 10 NM Marine Forecast


REST OF TODAY

S
WINDS
10 - 15
KNOTS

TONIGHT

N
WINDS
10 - 15
KNOTS

TUE

N
WINDS
15 - 20
KNOTS

TUE NIGHT

N
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ450 Forecast Issued: 849 AM PDT Mon May 12 2025

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
Rest Of Today...S Wind 10 To 15 Kt. Seas 8 Ft. Wave Detail: Sw 4 Ft At 5 Seconds And W 8 Ft At 10 Seconds. A Chance Of Rain With A Slight Chance Of Tstms.
Tonight...N Wind 10 To 15 Kt. Seas 9 Ft. Wave Detail: W 9 Ft At 11 Seconds. Patchy Fog.
Tue...N Wind 15 To 20 Kt. Seas 8 Ft. Wave Detail: Nw 4 Ft At 5 Seconds And Nw 8 Ft At 11 Seconds.
Tue Night...N Wind 10 To 15 Kt. Seas 8 Ft. Wave Detail: Nw 5 Ft At 6 Seconds And Nw 7 Ft At 10 Seconds.
Wed...N Wind 20 To 25 Kt. Seas 7 Ft. Wave Detail: Nw 7 Ft At 10 Seconds.
Wed Night...N Wind 15 To 20 Kt. Seas 7 Ft. Wave Detail: N 7 Ft At 7 Seconds And Nw 4 Ft At 12 Seconds.
Thu...N Wind 15 To 20 Kt. Seas 7 Ft. Wave Detail: N 7 Ft At 7 Seconds And Nw 3 Ft At 13 Seconds.
Thu Night...N Wind 15 To 20 Kt. Seas 7 Ft. Wave Detail: N 7 Ft At 7 Seconds And Nw 3 Ft At 12 Seconds.
Fri...N Wind 10 To 15 Kt. Seas 5 Ft. Wave Detail: N 5 Ft At 6 Seconds And Nw 3 Ft At 11 Seconds.
Fri Night...N Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: N 4 Ft At 5 Seconds And Nw 4 Ft At 12 Seconds.
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Area Forecast Discussion
National Weather Service Eureka CA
425am PDT Monday May 12 2025

Synopsis
Light to moderate showers along with gusty winds over the higher terrain. Showers will tapper off late this afternoon, with lingering showers through tonight. Followed by drier and warmer conditions by mid week.

Northwest California is currently under the influence of a weak late season storm system involving cyclogenesis and an associated occluded front pushing onshore. This is bringing rain showers, mountain snow and gusty west-southwest winds. Radar doppler depicts light to moderate showers moving northeastward across the area, with periods of steady rain observed in Del Norte and Humboldt counties overnight. The low pressure will moves over the area today and keep driving southeastward through Tuesday. This will continue to support unsettled weather and cold temperatures through today/tonight. Isolated thunderstorms are possible (15-25% chance) this afternoon over the higher terrain north of Cape Mendocino, especially in Trinity County. Showers activity are anticipated to tapper off late this afternoon, with lingering showers through tonight.

On Tuesday, a shortwave ridge will begin to builds in the wake of the trough filtering a slightly drier airmass. However, some isolated light showers are possible to developed inland Tuesday afternoon due to a lingering low level moisture and diurnal heating. A warming trend is expected to start on Tuesday, with inland highs warm up into the mid 60's to mid 70's. Enhancing onshore flow will remain the coastal areas in the mid to upper 50's. Areas of valley fog are expected to develop Tuesday night into Wednesday.

All ensembles continue showing a high confidence for a weak ridging persisting across the area through late in the week. Expect warmer and drier weather conditions across Northwest California for the remainder of the work week. /ZVS

Marine
Northern waters are in Small Craft Advisory this morning, with the southern waters reaching SC.Y by this afternoon. Combined 6 to 9 foot seas will set in today and build to 10- 12 feet by late tonight into Tuesday early morning. Steep waves will keep small craft conditions going through at least Wednesday evening for southern waters. A short break from small craft conditions is forecast for northern waters by early Tuesday morning as steep waves return, with fresh to strong northerlies and steep seas begin to build again tonight into Tuesday, peaking in the afternoon. NBM has around a 30% chance of Gale Force gusts in the lee of Cape Mendocino Tuesday afternoon. /MH

.EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 3am PDT Tuesday for PZZ450-470.

Small Craft Advisory from 3pm this afternoon to 9pm PDT Wednesday for PZZ455.

Small Craft Advisory from 9am this morning to 9pm PDT Wednesday for PZZ475.