East Entrance U.S. waters Strait of Juan de Fuca Marine Forecast
| Tonight...W Wind 10 To 15 Kt. Waves 3 To 4 Ft. A Chance Of Rain Late. |
| Wed...W Wind 5 To 10 Kt, Veering To N In The Afternoon. Waves Around 3 Ft In The Morning, Then Around 2 Ft Or Less. A Chance Of Rain. |
| Wed Night...N Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. A Chance Of Rain. |
| Thu...N Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. A Chance Of Rain. |
| Thu Night...Nw Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. A Chance Of Rain. |
| Fri...W Wind 5 To 10 Kt, Backing To S In The Afternoon. Waves Around 2 Ft Or Less. Rain Likely, Mainly In The Morning. |
| Fri Night...Sw Wind 10 To 15 Kt, Rising To 15 To 20 Kt After Midnight. Waves 3 To 5 Ft. A Chance Of Rain In The Evening, Then Rain Likely After Midnight. |
| Sat...Sw Wind 15 To 20 Kt. Waves 5 To 7 Ft. Rain. |
| Sat Night...W Wind 15 To 20 Kt. Waves 6 To 9 Ft, Subsiding To 5 To 7 Ft After Midnight. Rain Likely, Mainly In The Evening. |
| Sun...Sw Wind 10 To 15 Kt, Becoming Ne 5 To 10 Kt In The Afternoon. Waves 3 To 5 Ft. A Chance Of Rain. |
| Sun Night...N Wind 5 To 10 Kt, Becoming Nw 10 To 15 Kt After Midnight. Waves Around 2 Ft Or Less. A Chance Of Rain. |
| Area Forecast Discussion National Weather Service Seattle WA 902am PDT Tuesday Oct 7 2025 Satellite imagery shows just some high clouds over the northwest corner of the state this morning with clear skies elsewhere. Temperatures are recovering quickly from some cool overnight lows with 40s and lower 50s at 9 am. Offshore flow giving the area one more warm day. Transition to onshore flow tonight with cooler temps Wednesday. Current forecast on track. /issued 400am PDT Tuesday Oct 7 2025/ Synopsis Dry and warmer conditions will continue across western Washington for one more day today ahead of a pattern change. Troughing will resume over the Pacific Northwest through the remainder of the week and into the weekend, bringing much cooler temperatures, cloudy skies, and periods of light showers. Chances for more widespread precipitation increase into the weekend, with the Cascades likely seeing accumulating snowfall over higher elevations. Short Term - Today through Thursday Western Washington will see one more day of mostly clear skies and above normal temperatures today as an upper level ridge shifts eastward. Offshore flow through the Cascade gaps will gradually weaken throughout the morning as onshore flow increases along the coast. While areas along the coast will see a few degrees of cooling today, areas across the interior lowlands will see another day of highs mostly in the 70s. As an upper level trough drops southward along the Pacific Northwest Coast later tonight, a frontal system will split apart as it reaches western Washington to bring little more than cooler temperatures and cloudy skies. Areas along the Canadian border may see light shower activity develop this evening into Wednesday, but any accumulations would be minimal. Elsewhere, increased moisture from a return to onshore flow will bring in cloudy skies Wednesday for more typical fall-like conditions. A cutoff low will develop offshore through the remainder of the week, with potential for wrap around moisture to be advected northward as the low pressure system slowly creeps southward along the coast. Rainfall accumulations from any showers that develop will be light, generally less than a tenth of an inch across western Washington. Temperatures Wednesday and Thursday will cool considerably as the trough strengthens offshore and onshore flow increases, with highs mostly in the upper 50s to low 60s. Long Term - Friday Through Monday Ensemble guidance remains in good agreement over a more active pattern emerging into the weekend as the offshore low moves inland and another trough drops down from British Columbia. Temperatures over the weekend will continue on a cooling trend, with highs peaking below 60 degrees for most areas by Saturday and Sunday. As more widespread precipitation enters the region, snow levels will drop to roughly 4000 feet, bringing in the first mountain snow of the season. Ensembles maintain a moderate (35% to 45%) chance of accumulating snow through Stevens Pass over the holiday weekend, though Snoqualmie Pass might be low enough in elevation for limited impacts. The latest model guidance has increased snow totals for the Cascades over the weekend, showing potential for 3 to 6 inches or more of snow accumulation above 5000 feet. Given the first snow of the season will fall over a holiday weekend, recreationists should remain weather aware and use extra caution in the higher elevations of the Cascades Friday through Monday. At lower elevations, rainfall amounts are on track to reach up to half an inch of accumulation over the weekend. 15 Marine Broad high pressure over the coastal waters will continue to weaken this morning and the thermal trough will push inland. A weakening frontal system is expected to push across the waters Tuesday evening, restoring onshore flow over the waters. In addition, this system will lead to an increase in winds and wave heigheights over the coastal waters. As the wave heigheights increase over the coastal waters, seas will become steep with wave heigheights of 7-12 ft with a dominant period of 7-8 seconds. Northwesterly winds will increase over the coastal waters as well, with sustained winds of 20- 30 kt possible. The highest wave heigheights and strongest winds will be over the outer coastal waters. Seas will begin to subside starting Wednesday morning below 10 ft and continue throughout the week. Additional systems are likely to move over the waters, with guidance suggesting that a strong system will move over the waters on Saturday, bringing increased winds and seas. Latest guidance suggests seas may build up to 15 to 16 ft on Saturday and a chance (30-45%) of gale gusts are possible through the Strait of Juan de Fuca. 29 Fire Weather Offshore flow will continue throughout the morning today as an upper level ridge shifts eastward over the region, with occasionally gusty easterly winds through the Cascade gaps. This will cause poor overnight relative humidity recoveries across western Washington, particularly along the western Cascade slopes where RH values will bottom out around 20% to 30%. While recent rains have kept fuel conditions below critical thresholds, dry conditions and breezy easterly winds have caused elevated fire weather concerns through the remainder of the morning today. Offshore flow today will weaken through the morning, shifting back to onshore flow in the afternoon. This will bring in more moist air with much higher humidities and good overnight humidity recoveries for the remainder of the week. Relative humidities will continue to improve into the weekend alongside much cooler temperatures as chances for precipitation increase. 15 NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory from 4pm this afternoon to 2pm PDT Wednesday for Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. Small Craft Advisory until 2pm PDT Wednesday 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. |
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