Cape Mendocino to Point Arena CA out 10 NM Marine Forecast
| Today...Se Wind 15 To 20 Kt, Rising To 20 To 25 Kt With Gusts Up To 40 Kt This Afternoon. Seas 8 Ft. Wave Detail: S 6 Ft At 6 Seconds And S 3 Ft At 12 Seconds. Rain. |
| Tonight...Se Wind 20 To 25 Kt With Gusts Up To 35 Kt. Seas Around 8 Ft. Wave Detail: S 6 Ft At 6 Seconds And S 2 Ft At 11 Seconds. Showers. |
| Wed...S Wind 5 To 10 Kt. Seas 10 Ft. Wave Detail: S 4 Ft At 5 Seconds And S 2 Ft At 10 Seconds. A Chance Of Showers. |
| Wed Night...E Wind 5 Kt. Seas 11 Ft. Wave Detail: Nw 11 Ft At 13 Seconds. Patchy Fog. |
| Thu...N Wind 5 To 10 Kt. Seas 10 Ft. Wave Detail: Nw 10 Ft At 13 Seconds. |
| Thu Night...N Wind 15 To 20 Kt. Seas 8 Ft. Wave Detail: Nw 8 Ft At 12 Seconds. |
| Fri...N Wind 20 To 25 Kt. Seas 8 Ft. Wave Detail: Nw 6 Ft At 6 Seconds And Nw 8 Ft At 11 Seconds. |
| Fri Night...N Wind 20 To 25 Kt. Seas 8 Ft. Wave Detail: Nw 7 Ft At 7 Seconds And Nw 5 Ft At 10 Seconds. |
| Sat...N Wind 20 To 25 Kt. Seas 7 Ft. Wave Detail: N 7 Ft At 7 Seconds And W 2 Ft At 15 Seconds. |
| Sat Night...N Wind 25 To 30 Kt. Seas 8 Ft. Wave Detail: N 8 Ft At 8 Seconds And W 2 Ft At 13 Seconds. |
| Area Forecast Discussion National Weather Service Eureka CA 1208am PDT Tuesday September 30 2025 Synopsis Another front will bring additional rain and strong gusty southerly winds Tuesday afternoon through Tuesday night. Lingering showers on Wednesday will diminish on Thursday. Dry weather is expected Friday through the weekend. An upper level low low is sitting well off the Washington coast and has several shortwaves and associated frontal systems moving around it. The first front moved through on Monday bringing rain to much of the area. This has left the low levels moist with fog developing in some areas. Today the next front is expected to move through the area. This second one generally looks to have less rain and more wind with it in Humboldt and Del Norte counties. This is showing up well on water vapor this morning. Most of the current models are showing the tenth to a quarter of an inch of rain as this moves onshore. With the stronger winds terrain effects are expected to more pronounced limiting the rain in the Humboldt bay region and enhancing it on the south slopes, especially in southern Humboldt and Del Norte counties. Local amounts in the King Range and the mountains of Del Norte county will likely exceed an inch. There are still some model solutions that show a more widespread half inch or so of rain, but these may not be capturing all of the terrain effects so they look like a lower probability scenario. The models are showing winds at 850MB of 30 to 40 kt over Humboldt and Del Norte counties. The soundings are showing an unstable layer near the surface that would allow this to mix down to the surface at least over some of the higher terrain. This may bring gusts of 40 to 50 mph over the higher terrain of Humboldt county and along the coast near Crescent City. The wind advisory looks to remain on track. Winds may not quite reach the 45 mph for a wind advisory, but this is the first stronger southerly winds of the fall and that may increase impacts. Tuesday night and Wednesday the upper level low continues to spin and push some showers across the area. The NBM is showing the potential for some thunderstorms, but the soundings show some poor lapse rates aloft that will likely prevent this. Thursday there may be a few lingering showers, but these should be fairly limited. Friday through the weekend and into early next week dry weather is expected to return. Strong high pressure builds over the eastern Pacific. The uncertainty lies in exactly how far east this makes it. It also looks like there will be some weather systems moving down the east side of the ridge in an inside slider pattern. This may create offshore flow bringing clear skies and dry conditions. These clear and dry conditions will also bring the potential for frost or freezing temperatures in the valleys. This will be highly dependent on how much drying there is, but it is starting to look like we will see frost at least in the colder areas. MKK Marine An exiting storm system has left moderately steep waves up to around 7 feet across all waters Monday night. A much windier storm system will sweep across the waters Tuesday morning. Southerly wind gusts will be strongest in the northern waters with some gusts most likely in excess of 40 kts by mid Tuesday morning. Winds will be greatest in the northern waters with consistent gale conditions through the afternoon. The southern waters will see near gale force conditions around Cape Mendocino but weaker gusts only around 24 kts further south. Short period seas will build as much as 8 feet but will not have time to grow further as southerly wind quickly fall off by Tuesday night, replaced by more gentle southerly breezes at least through Thursday. Despite calming winds and short period seas, a mid period swell will build up to 12 feet at 14 seconds by early Wednesday, maintaining generally steep seas in all waters through at least early Thursday morning. Wind will turn northerly late in the week and begin to increase mostly south of Cape Mendocino. A resurgence of near gale conditions are possible lee of the Cape by Saturday. /JHW .BEACH HAZARDS...A steep, mid period northwest swell may bring some hazardous conditions to area beaches during the day Wednesday and Thursday. While the swell will only be around 14 feet at 14 seconds (producing a beach run up no more than about 18 feet), this will be one of the first swells of the season. This means most areas beaches have a shallower grade that has formed over the summer, which may make waves especially dangerous and unexpected. Take extra care if on local beaches this week. /JHW .EKA WATCHES/WARNINGS/ADVISORIES... CA... Wind Advisory from 11am Tuesday to 1am PDT Wednesday for CAZ101-102-104>106. NORTHWEST CALIFORNIA COASTAL WATERS... Gale Warning from 11am to 11pm PDT Tuesday for PZZ450. Small Craft Advisory from 11am to 11pm PDT Tuesday for PZZ455. Gale Warning from 8am to 11pm PDT Tuesday for PZZ470. Small Craft Advisory from 8am to 11pm PDT Tuesday for PZZ475. For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png |
Eureka CA Radar
Pacific Southwest Radar