Point Grenville to Cape Shoalwater WA out 10 to 60 NM Marine Forecast
| Today...N Wind 15 To 25 Kt. Seas 7 To 9 Ft, Building To 8 To 11 Ft This Afternoon. Wave Detail: N 10 Ft At 7 Seconds And Nw 9 Ft At 10 Seconds. |
| Tonight...Nw Wind 20 To 25 Kt. Seas 8 To 11 Ft. Wave Detail: Nw 10 Ft At 8 Seconds And W 7 Ft At 10 Seconds. |
| Thu...Nw Wind 15 To 25 Kt, Easing To 10 To 15 Kt In The Afternoon. Seas 8 To 10 Ft, Subsiding To 6 To 8 Ft In The Afternoon. Wave Detail: Nw 7 Ft At 8 Seconds And W 7 Ft At 10 Seconds. |
| Thu Night...Nw Wind 5 To 10 Kt. Seas 5 To 7 Ft. Wave Detail: Nw 4 Ft At 6 Seconds And Nw 7 Ft At 12 Seconds. |
| Fri...Sw Wind 5 To 10 Kt. Seas 7 To 9 Ft. Wave Detail: W 9 Ft At 15 Seconds. A Chance Of Rain In The Afternoon. |
| Fri Night...S Wind 5 To 10 Kt. Seas 8 To 10 Ft. Wave Detail: Nw 2 Ft At 6 Seconds And W 9 Ft At 15 Seconds. A Chance Of Rain. |
| Sat...Sw Wind Around 5 Kt, Veering To W In The Afternoon. Seas 8 To 10 Ft, Building To 10 To 11 Ft In The Afternoon. Wave Detail: Nw 11 Ft At 14 Seconds. A Chance Of Rain. |
| Sat Night...Nw Wind Around 10 Kt. Seas 8 To 10 Ft. Wave Detail: W 10 Ft At 13 Seconds. A Chance Of Rain. |
| Sun...S Wind Around 10 Kt, Veering To W In The Afternoon. Seas 7 To 8 Ft. Wave Detail: S 4 Ft At 7 Seconds And W 8 Ft At 12 Seconds. A Chance Of Rain. |
| Sun Night...W Wind Around 10 Kt, Backing To Sw After Midnight. Seas 7 To 8 Ft. Wave Detail: S 4 Ft At 7 Seconds And W 6 Ft At 12 Seconds. Rain Likely. |
| Area Forecast Discussion National Weather Service Seattle WA 851am PDT Wednesday September 24 2025 Synopsis High pressure remains in place across western Washington for one more warm and dry day across the region. The ridge is replaced by zonal flow over the region Thursday, with onshore flow increasing and ushering in cooler conditions. Precipitation chances increase later in the week, but remain mostly limited to the northwestern portions of the area. A more significant weather system likely arrives late in the weekend. Short Term - Today through Friday The latest forecast remains on track with no updates this morning. High pressure remains in place over the region today. Expect to see a few pockets of patchy fog or low stratus in the sheltered valleys and the immediate coastline this morning, but otherwise predominantly cloud free conditions with light winds continuing this morning. Offshore flow across the eastern half of the area continues to ease today. Some spots in the Cascades may again see RH values dip to near critical thresholds, and temperatures across the interior will climb in the 70s. Onshore flow begins to pick up late today and will bring two primary changes: increasing RH values and helping to mix out some of the smoke and send it eastward. However, any additional smoke from the Bear Gulch fire may again spread across the Puget Sound region. Continue to monitor statements and forecast from air quality agencies for the latest updates. With a return of the deeper onshore flow, expect significantly cooler temperatures Thursday with few sites warming above the mid 60s and more widespread cloud cover expected. Continued zonal flow will maintain more typical fall-like conditions across the region into Friday. This could even leave the door open to some light rainfall, mostly across the Olympic Peninsula and San Juans, though chances remain around 20% at best for Friday and any amounts will be quite light. 12 Long Term - Saturday Through Tuesday Ensemble guidance is beginning to converge a bit better with respect to the evolution of the pattern. Expect a little more mild day on Saturday with southerly flow ahead of the an approaching frontal system. This will bring temperatures back into the lower 70s, but should maintain a generally dry day for much of the region. Rain chances remain greatest along the coast and into the northwest portions of western Washington through Saturday. Good agreement in the guidance that the next front will approach late Saturday through Sunday and could bring another round of more widespread rain. Another disturbance could follow into Monday with another round of rain sweeping through to close out the month. 12 Marine Onshore flow will increase today in response to an expanding surface ridge over the coastal and offshore waters. This will lead to increasing northwesterlies over the coastal waters. Small craft advisories have been posted for the outer coastal waters and southern inner coastal waters from later this morning into Thursday for a combination of wind and choppy seas. Advisories may need to be extended to other portions of the inner coastal waters as well as the central/east strait later this evening into Thursday. The overall pattern will begin to turn a little more active as we approach the weekend. A dissipating front will reach the area Friday night into Saturday with a more substantial early autumn front expected to reach the area Sunday night into Monday with additional potential impacts for area waters. 27 NOAA Seattle WA Office: Watches - Warnings - Advisories WA... Air Quality Alert until noon PDT today for Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-City of Seattle-Downtown Everett / Marysville Area-Eastside-Foothills and Valleys of Central King County-Foothills and Valleys of Pierce and Southern King Counties-Foothills and Valleys of Snohomish and Northern King Counties-Foothills and Valleys of the North Cascades- Lowlands of Pierce and Southern King Counties-Lowlands of Western Skagit and Northwestern Snohomish Counties- Shoreline / Lynnwood / South Everett Area. PZ...Small Craft Advisory until 11am PDT Thursday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. |
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