Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

For More Weather Information:

Seattle, WA Local Forecast Office

35NM SW Seattle WA

Marine Point Forecast

[NOTICE]

Today
WSW 12kt
< 1ft
Tonight
SSW 11kt
< 1ft
Tuesday
S 14kt
< 1ft
Tuesday Night
SW 15kt
< 1ft
Wednesday
⇑WSW 9kt
< 1ft
Wednesday Night
W 9kt⇓
< 1ft
Thursday
⇑WSW 7kt
< 1ft
Thursday Night
WSW 9kt⇓
< 1ft
Friday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:27 pm PDT Apr 12, 2026
Forecast Valid: 8am PDT Apr 13, 2026-6pm PDT Apr 19, 2026

View Nearby Observations

Detailed Forecast

Today

WSW wind 9 to 12 kt. A chance of rain, mainly after 5pm. Waves 1 ft or less.

Tonight

SSW wind 7 to 11 kt. A chance of rain, mainly after 4am. Waves 1 ft or less.

Tuesday

S wind 7 to 14 kt, with gusts as high as 22 kt. Rain. Waves 1 ft or less.

Tuesday Night

SW wind 6 to 15 kt, with gusts as high as 21 kt. Rain, mainly before 11pm. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming WSW 5 to 9 kt in the afternoon. A chance of rain, then showers and possibly a thunderstorm after 11am. Waves 1 ft or less.

Wednesday Night

W wind 5 to 9 kt becoming variable and less than 5 kt in the evening. Rain likely before 11pm. Waves 1 ft or less.

Thursday

Variable winds less than 5 kt becoming WSW 5 to 7 kt in the afternoon. A slight chance of rain after 11am. Waves 1 ft or less.

Thursday Night

WSW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Partly sunny. 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.