Marine Weather Net

Cape Mendocino to Point Arena CA out 10 NM Marine Forecast


REST OF TODAY

N
WINDS
10 - 15
KNOTS

TONIGHT

NW
WINDS
10 - 15
KNOTS

WED

NW
WINDS
10 - 15
KNOTS

WED NIGHT

NW
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
PZZ455 Forecast Issued: 833 AM PDT Tue Oct 13 2026

Rest Of Today...N Wind 10 To 15 Kt. Seas 7 Ft. Wave Detail: Nw 6 Ft At 8 Seconds And Nw 4 Ft At 15 Seconds.
Tonight...Nw Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: Nw 5 Ft At 7 Seconds And Nw 4 Ft At 14 Seconds.
Wed...Nw Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: Nw 5 Ft At 6 Seconds And Nw 4 Ft At 14 Seconds.
Wed Night...Nw Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: Nw 4 Ft At 6 Seconds And Nw 3 Ft At 13 Seconds.
Thu...Nw Wind 5 Kt. Seas 5 Ft. Wave Detail: Nw 3 Ft At 7 Seconds And Nw 5 Ft At 13 Seconds.
Thu Night...N Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: Nw 5 Ft At 12 Seconds And S 3 Ft At 15 Seconds.
Fri...N Wind 5 To 10 Kt. Seas 4 Ft. Wave Detail: Nw 4 Ft At 12 Seconds And S 2 Ft At 15 Seconds.
Fri Night...N Wind 10 To 15 Kt. Seas 5 Ft. Wave Detail: Nw 4 Ft At 7 Seconds And W 4 Ft At 11 Seconds.
Sat...N Wind 15 To 20 Kt. Seas 6 Ft. Wave Detail: Nw 5 Ft At 6 Seconds And W 5 Ft At 13 Seconds.
Sat Night...N Wind 15 To 20 Kt. Seas 7 Ft. Wave Detail: Nw 6 Ft At 7 Seconds And W 6 Ft At 13 Seconds.
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Area Forecast Discussion
National Weather Service Eureka CA
1213pm PDT Tuesday Oct 13 2026

.KEY MESSAGES...

* Another cold morning is expected this morning with areas of frost and freezing potential.

* A warming and drying trend is expected to impact the area through the week into the weekend, peaking Thursday and Friday.

* Forecast confidence is increasing on a cold front arriving either late this weekend or early next week.

Synopsis
Clear skies and seasonable temperatures are expected today with another chilly morning expected for the inland valleys. A warming and drying trend is expected through the week. A frontal system is probable late this weekend or early next week.

An upper level ridge continues to build over the region as the upper level trough that ushered in the colder air this weekend continues to move eastward over the Grand Canyon today. This developing high pressure will cause a steady warm up inland from seasonable temperatures today to above normal temps by the end of the work week. Overnight calming will result in cold air flowing down the terrain and settling in the valleys. Freezing temperatures were recorded in Trinity County last night, and a slight warming is possible through tomorrow morning with frost potential for the coldest valleys.

A warming and drying trend will continue through the week peaking Thursday and Friday. Relative humidities are expected to be <20% for Trinity, Lake, and inland areas of Mendocino County. NBM data probabilities shows around a 30-40% of temperatures >90degF for Ukiah. Models are still holding strong on an incoming cold front arriving this weekend which could bring rain and strong winds to the area. Details on this system will become more clear as the week goes. DS

Marine
Moderate to fresh northerly breezes are expected in the outer waters today. WInds will remain much lighter for the inner waters with max gusts up to 15-20kts during the heat of the afternoon. Small craft conditions continue for the outer waters due to decaying short period seas mixing with a mid-period NW swell. Through the week, short period seas will continue to lower while this NW swell eases even slower. This weekend, a large NW swell is expected to impact the coastal waters as a cold front enter the area. DS

Fire Weather
Multiple days of cool but dry air has lowered ERC values. Much weaker, terrain-driven winds and an increasingly stable atmosphere in the coming days will help greatly reduce overall fire danger. However, dry conditions are expected through the week (around 20% RH each day) with worsening overnight recoveries through Thursday as midslope thermal belts develop. Smoke transport will also worsen through the week for any fires that do start. More moist air is expected to push across the area this weekend with a potential for very breezy conditions in Mendocino and Lake county late this weekend into early next week. DS

.EKA WATCHES/WARNINGS/ADVISORIES... CA... Frost Advisory from 1am to 8am PDT Wednesday for CAZ104- 106-108-110-111-114-116-117-120.

NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 3pm PDT Wednesday for PZZ475.

For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png.