Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

For More Weather Information:

Seattle, WA Local Forecast Office

35NM SW Seattle WA

Marine Point Forecast

[NOTICE]

Wednesday
⇑WSW 10kt
< 1ft
Wednesday Night
W 6kt⇓
< 1ft
Thursday
⇑SW 7kt
< 1ft
Thursday Night
WSW 10kt⇓
< 1ft
Friday
Light Wind
< 1ft
Friday Night
Light Wind
< 1ft
Saturday
Light Wind
< 1ft
Saturday Night
Light Wind
< 1ft
Sunday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 1:16 am PDT Apr 15, 2026
Forecast Valid: 2am PDT Apr 15, 2026-6pm PDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

...GALE WARNING IN EFFECT UNTIL 11 PM PDT THIS EVENING...

Wednesday

Variable winds less than 5 kt becoming WSW 5 to 10 kt in the morning. Rain and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then a chance of rain and thunderstorms after 5pm. Waves 1 ft or less.

Wednesday Night

W wind around 6 kt becoming variable and less than 5 kt in the evening. Rain likely, mainly before 9pm. Waves 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Thursday Night

WSW wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Partly sunny. Waves 1 ft or less.

Friday Night

Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

Saturday

Variable winds 5 kt or less. A slight chance of rain after 11am. Waves 1 ft or less.

Saturday Night

Variable winds 5 kt or less. A chance of rain. Waves 1 ft or less.

Sunday

Variable winds 5 kt or less. A chance of rain. Waves 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.