James Island to Point Grenville WA out 10 NM Marine Forecast
| Tonight...W Wind Around 5 Kt, Backing To Sw Around 5 Kt Late. Seas 3 To 4 Ft. Wave Detail: Nw 3 Ft At 8 Seconds, W 3 Ft At 12 Seconds And Sw 2 Ft At 17 Seconds. A Chance Of Rain Late. |
| Sat...S Wind Around 5 Kt. Seas 3 To 4 Ft. Wave Detail: Nw 2 Ft At 6 Seconds, W 3 Ft At 11 Seconds And Sw 2 Ft At 17 Seconds. Rain Likely, Mainly In The Morning. |
| Sat Night...Nw Wind Around 5 Kt. Seas 3 To 4 Ft. Wave Detail: Nw 4 Ft At 9 Seconds And Sw 2 Ft At 16 Seconds. |
| Sun...Nw Wind 5 To 10 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 5 Ft At 9 Seconds, W 4 Ft At 13 Seconds And Sw 2 Ft At 15 Seconds. |
| Sun Night...Nw Wind Around 10 Kt. Seas 4 To 6 Ft. Wave Detail: W 6 Ft At 8 Seconds. |
| Mon...W Wind 5 To 10 Kt. Seas 5 To 6 Ft. Wave Detail: W 6 Ft At 8 Seconds. A Chance Of Rain In The Morning. |
| Mon Night...W Wind 5 To 10 Kt. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 8 Seconds. A Chance Of Rain After Midnight. |
| Tue...Sw Wind 10 To 15 Kt, Rising To 15 To 20 Kt In The Afternoon. Seas 4 To 5 Ft, Building To 5 To 7 Ft In The Afternoon. Wave Detail: Sw 6 Ft At 6 Seconds, W 5 Ft At 9 Seconds And W 2 Ft At 12 Seconds. Rain. |
| Tue Night...W Wind 15 To 20 Kt. Seas 7 To 9 Ft. Wave Detail: Sw 7 Ft At 7 Seconds And W 9 Ft At 10 Seconds. Rain. |
| Wed...Nw Wind 15 To 20 Kt, Easing To 10 To 15 Kt In The Afternoon. Seas 6 To 9 Ft. Wave Detail: S 3 Ft At 7 Seconds And W 8 Ft At 10 Seconds. Rain Likely, Mainly In The Morning. |
| Wed Night...Nw Wind 10 To 15 Kt. Seas 6 To 8 Ft. Wave Detail: S 2 Ft At 7 Seconds And W 8 Ft At 10 Seconds. |
| Area Forecast Discussion National Weather Service Seattle WA 953pm PDT Fri April 10 2026 Synopsis Dry conditions this evening and early tonight before wet and cooler conditions move in for late tonight and into the weekend. A weak ridge will build over the region on Monday. A stronger frontal system midweek will bring lowland rain, mountain snow, and breezy winds. Temperatures will cool further in the wake of this system before slowly warming back up for the second half of next week. Short Term - Tonight Through Sunday Night Latest radar trends showing thunderstorm activity diminishing over northern OR this evening. While latest model data has these cells holding together as they move northward into the CWA, by that point any thunder risk should be played out. That said, the majority of W WA finds itself between two banks of clouds, a northern bank stretching from the Snohomish/Skagit county line and the other creeping up from the south, mainly along the Chehalis river valley getting as far north as Olympia at the time of this writing. Skies will fill in as the night progresses as this band continues to move northward. Inherited forecast remains on track, although will continue to monitor dwindling activity in OR to ensure that current trends hold. For additional forecast details, please refer to the Previous Discussion section below. 18 From Previous Discussion...High clouds prevail over western Washington today as waves move up northward from a large upper level low over northern California. While temperatures will continue to be warm, the clouds will help to limit insolation and keep the high temperature down from what it otherwise could be. Similar conditions to yesterday are expected, with highs in the mid 60s to near 70, except closer to 60 along the immediate coastlines. Showers will begin to move in from the south tonight into early Saturday. There may be some showers as early as this evening across portions of southwest Washington, but the bulk of the precipitation is not expected to arrive until early Saturday morning. Rain will move across the area throughout Saturday morning and early afternoon, devolving into more scattered showers by Saturday evening. Scattered shower chances will continue into Sunday as well but many may be mostly dry for much of the day. Temperatures this weekend will also be much cooler compared to today, with highs returning into the mid to upper 50s and lows in the 40s. Long Term - Monday Through Friday A weak upper level ridge looks to develop on Monday over British Columbia, creating split flow over the area before a large upper level low digs into the area Tuesday into Wednesday. There is starting to be more model consensus in the arrival of precipitation Tuesday night and continuing into Wednesday. This system looks to bring some decent moisture, with the potential for an inch or two of rain across the mountains, with slightly lesser amounts across the lowlands. With snow levels lowering to around 3000 ft, this will allow for several inches of accumulating snow across the mountains, including the passes. Finally, this system also looks to bring windy conditions across the area, particularly on Tuesday. Drier conditions look to prevail Thursday and beyond. Temperatures will be quite cool, with highs in the upper 40s to low 50s and lows in the 30s. Widespread freezing conditions may be possible in the morning outside of urban areas by Thursday morning. Temperatures then slowly start to warm up through the end of the week but remain below normal. 62 Marine An area of low pressure will swing south of area waters tonight into Saturday morning. No impacts are expected with this disturbance as it tracks into northern California and weaken. Westerly winds through the strait will pick up during this time allowing a brief spell in the potential for SCA (Small Craft Advisory) gusts but the window is small enough to not warrant the need for an advisory at this time. The pattern will remain active into next week with a better chance for headlines. A strong frontal system looks to arrive on Tuesday with the potential for widespread wind related headlines as SCAs (Small Craft Advisories) look to be a sure bet currently. Seas will remain below 10 ft through the weekend and into early next week, hovering between 4-7 ft. Seas will build on Wednesday towards 9-10 ft. DM Hydrology No river flooding is expected in the next seven days. NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...None. |
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