Cape Mendocino to Point Arena CA out 10 NM Marine Forecast
| Tonight...Nw Wind 5 Kt, Becoming 5 To 10 Kt After Midnight. Seas 4 Ft. Wave Detail: Nw 2 Ft At 8 Seconds And W 3 Ft At 10 Seconds. Patchy Dense Fog This Evening. |
| Sat...Nw Wind 10 To 15 Kt. Seas 4 Ft. Wave Detail: Nw 3 Ft At 7 Seconds And W 2 Ft At 10 Seconds. |
| Sat Night...Nw Wind 15 To 20 Kt. Seas 5 Ft. Wave Detail: Nw 5 Ft At 6 Seconds And W 2 Ft At 9 Seconds. |
| Sun...Nw Wind 15 To 20 Kt With Gusts Up To 35 Kt. Seas 5 Ft. Wave Detail: Nw 5 Ft At 7 Seconds And W 1 Foot At 10 Seconds. |
| Sun Night...Nw Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: Nw 6 Ft At 7 Seconds And S 2 Ft At 16 Seconds. |
| Mon...Sw Wind 5 Kt. Seas 4 Ft. Wave Detail: Nw 4 Ft At 8 Seconds And S 2 Ft At 15 Seconds. |
| Mon Night...Nw Wind 5 Kt. Seas 4 Ft. Wave Detail: Nw 4 Ft At 8 Seconds And W 1 Foot At 9 Seconds. Patchy Fog. |
| Tue...Nw Wind 5 Kt. Seas 3 Ft. Wave Detail: Nw 3 Ft At 7 Seconds And W 1 Foot At 10 Seconds. |
| Tue Night...N Wind 10 To 15 Kt. Seas 3 Ft. Wave Detail: Nw 3 Ft At 6 Seconds And S 2 Ft At 15 Seconds. |
| Wed...Nw Wind 10 To 15 Kt. Seas 4 Ft. Wave Detail: Nw 4 Ft At 6 Seconds And W 2 Ft At 11 Seconds. |
| Wed Night...N Wind 10 To 15 Kt. Seas 6 Ft. Wave Detail: Nw 5 Ft At 7 Seconds And W 2 Ft At 11 Seconds. |
| Area Forecast Discussion National Weather Service Eureka CA 352pm PDT Fri August 21 2026 .KEY MESSAGES... * A deep marine layer and cooler temperatures aloft will combine to bring near to slightly below normal temperatures this weekend. Synopsis A deep marine layer and cooler temperatures aloft will combine to bring near to slightly below normal temperatures through the weekend. The coast may finally see more clearing over the weekend. Some warming is expected Sunday and Monday before another trough brings cooler temperatures next week. An upper level-open wave trough crowds into the PACNW coastline over the few days. This pacific low is a part of a larger pattern, Omega block, which has high pressure ridging set up in the interior with peak amplitude extending into Canada. The positive tilt of the pacific area trough has kept the potential for convection and consequently lightning probabilities low. That and the sourced tropical moisture being pulled into the area via elongated troughing motion has also paired with the deepening marine layer to quell high temperatures inland and rebound overnight recovery RH values, further suppressing fire weather behavior. Saturday the upper level low starts to move out of the area with high pressure filling in behind it. This will bring cooler temperatures aloft which will keep the inland areas mainly in the 80s with 70s closer to the coast. This may finally bring some clearing and breezy afternoon winds. The cooler temperatures aloft will weaken the marine inversion. Saturday night into Sunday morning there is some offshore flow and this may help clear skies out more quickly during the day. It doesn't look strong enough to keep skies clear overnight. Monday through the middle of the week a trough starts to approach the area bringing cooler temperatures and deeper marine layer again. This will come more from the west, thunderstorms look unlikely. Marine Calm seas and light to gentle breezes are expected through early Saturday. Moderate northerly winds return to the outer waters Saturday afternoon and increase through Sunday with localized gusts near Gale, south of Cape Mendocino and fanning out into the southern outer waters. A small craft advisory has been hoisted for the southern waters late Saturday night/early Sunday morning as well as the northern outer waters which start Sunday evening. Fire Weather Marine influence has will continue to increase through the end of the weekend. High clouds will aid in the warmest interior temperatures pulling back closer to 90 with RH closer to 25 percent. Mid and upper slope recoveries will also improve though remain poor on higher peaks. Warmer, near average conditions will return Sunday and into early next week. .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... None. For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png |
Eureka CA Radar
Pacific Southwest Radar