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

11NM N Seattle WA

Marine Point Forecast

[NOTICE]

Today
SE 6kt
< 1ft
Tonight
S 11kt
< 1ft
Tuesday
S 20kt
< 1ft
Tuesday Night
S 21kt⇓
< 1ft
Wednesday
S 6kt
< 1ft
Wednesday Night
NW 7kt⇓
< 1ft
Thursday
S 6kt⇓
< 1ft
Thursday Night
Light Wind
< 1ft
Friday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:27 pm PDT Apr 12, 2026
Forecast Valid: 7am PDT Apr 13, 2026-6pm PDT Apr 19, 2026

View Nearby Observations

Detailed Forecast

Today

SE wind around 6 kt becoming NNE in the afternoon. Rain likely, mainly between 8am and 9am. Waves 1 ft or less.

Tonight

ENE wind 5 to 11 kt becoming S after midnight. Rain likely, mainly after 4am. Waves 1 ft or less.

Tuesday

S wind 12 to 20 kt, with gusts as high as 28 kt. Rain. Waves 1 ft or less.

Tuesday Night

S wind 16 to 21 kt becoming ESE 7 to 12 kt after midnight. Winds could gust as high as 30 kt. Rain, mainly before 11pm. Waves 1 ft or less.

Wednesday

SSE wind around 6 kt becoming W in the afternoon. Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Wednesday Night

NW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A chance of rain before 11pm. Waves 1 ft or less.

Thursday

S wind around 6 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. 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.