Puget Sound and Hood Canal Marine Forecast
| Today...S Wind 5 To 10 Kt, Rising To 15 To 20 Kt This Afternoon. Waves Around 2 Ft Or Less. Showers Likely This Morning, Then A Chance Of Showers Early This Afternoon. A Slight Chance Of Showers Late. |
| Tonight...Sw Wind 15 To 20 Kt, Becoming S 10 To 15 Kt After Midnight. Waves Around 2 Ft Or Less. |
| Thu...S Wind 5 To 10 Kt, Becoming Sw 10 To 15 Kt In The Afternoon. Waves Around 2 Ft Or Less. |
| Thu Night...Sw Wind 10 To 15 Kt, Easing To 5 To 10 Kt After Midnight. Waves Around 2 Ft Or Less. A Chance Of Rain In The Evening, Then A Chance Of Showers After Midnight. |
| Fri...S Wind 5 To 10 Kt, Becoming Sw 10 To 15 Kt In The Afternoon. Waves Around 2 Ft Or Less. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon. |
| Fri Night...Sw Wind 10 To 15 Kt, Easing To 5 To 10 Kt After Midnight. Waves Around 2 Ft Or Less. Showers Likely, Mainly In The Evening. |
| Sat...Sw Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. Showers Likely In The Afternoon. |
| Sat Night...Nw Wind 5 To 10 Kt, Becoming Sw After Midnight. Waves Around 2 Ft Or Less. A Chance Of Showers In The Evening. |
| Sun...Sw Wind Around 5 Kt, Backing To Ne In The Afternoon. Waves Around 1 Ft Or Less. |
| Sun Night...N Wind Around 5 Kt, Backing To Sw After Midnight. Waves Around 1 Ft Or Less. |
| Area Forecast Discussion National Weather Service Seattle WA 335am PDT Wednesday May 13 2026 Synopsis Upper level low moving inland south of the area this morning. Air mass behind the low remaining unstable enough to keep showers in the forecast into Thursday morning. Weakening front moving through Thursday night with an upper level trough following the front Friday. Unsettled weather continuing into Saturday. Upper level ridge centered offshore Sunday through Tuesday with a weak system trying to move over the top of the ridge Monday. Short Term - Today through Friday Satellite imagery shows cloudy skies over Western Washington early this morning with an upper level low near Coos Bay/North Bend Oregon. Doppler radar indicating precipitation from the Puget Sound eastward and along the central coast. There was some lightning earlier but there hasn't been a lightning strike over the area in the last two hours. Mild early morning with the rain and cloud cover keeping temperatures in the 50s. Seattle-Tacoma airport did get 0.01 inches of rain Tuesday breaking a 13 day dry streak. It was only the 12th day with measurable rain in Seattle since the first full day of spring ( March 21st ). The normal number of rain days during this time frame is 25. Upper level low will weaken and move east today leaving an upper level trough over Western Washington. Showers continuing this morning decreasing this afternoon. The rain, cooling of the air mass and weakening of the upper level trough has and will continue to decrease the instablilty over the area. Enough to keep thunderstorms out of the forecast. The clouds and rain will also not allow for much daytime heating with highs a couple of degrees either side of 60. Upper level trough east of the area tonight with showers becoming isolated overnight. Convergence zone over Snohomish county in the evening will move into the Cascades before midnight. Lows in the mid 40s to lower 50s. Thursday morning looks dry with the trough well to the east and the next approaching system still offshore. Front approaching the coast and weakening by the end of the afternoon. Rain chances spreading inland in the afternoon. Westerly flow aloft will rain shadow the Central Puget Sound. Another cool day with highs in the mid 50s to lower 60s. Front falling apart as it moves through Western Washington Thursday night. Rain along the coast and over the Northwest Interior with just a chance for rain elsewhere. Not much in the way of cold air behind the front early Friday morning leading to just a chance of post frontal showers in the lowlands and showers likely in the Cascades. Lows in the 40s. Fast moving upper level trough moving into Western Washington Friday for another round of showers. Trough becoming negatively tilted Friday afternoon as it moves inland. Instablilty indexes not too impressive but enough to have a slight chance of thunderstorms in the afternoon for most of the area. Friday looks to be the coolest day in the next week with highs only in Long Term - Friday Night Through Tuesday Upper level trough remaining over Western Washington Friday night into Saturday keeping at least a chance of showers in the forecast. Could see a convergence zone move through the Puget Sound area late Saturday afternoon into Saturday evening as the trough drifts east. Upper level ridge building offshore extending into Southern British Columbia Sunday with the ridge remaining in place through Tuesday. A weak system will try and move over the top of the ridge into Western Washington Monday or Monday night. Slow warming trend with highs in the mid 50s to lower 60s Saturday, upper 50s to mid 60s Sunday and in the 60s Monday and Tuesday. Marine Persistent onshore flow may allow for a brief ebb in wind speeds in the Strait this morning, another push later today should ramp wind speeds back up into SCA (Small Craft Advisory) criteria. As such, have extended the inherited headline through tonight. At the tail end of this headline, looks like there might be some spillover into the Northern Inland Waters, and as such they will be included in this headline late this afternoon to its conclusion tonight. Otherwise, seas building over the coastal waters with a mix of a longer period and shorter period wave groups will bring confused seas that may be more hazardous than the wave heigheights (5-7 ft) would otherwise suggest. Latest model runs, while still supporting this prospect, still do not lend much in the way of confidence or of a widespread occurrence. As such, will keep coastal waters without headline with the morning forecast issuance. Otherwise, onshore flow continues through the Strait of Juan de Fuca later this week with northerly winds over the coastal waters. Another round of building seas to 8-9 ft over the coastal waters around Saturday from a distant disturbance. 14/18 Hydrology The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated during this time as needed. NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory until 11pm PDT this evening for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory from 5pm this afternoon to 11pm PDT this evening for Northern Inland Waters Including The San Juan Islands. |
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