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

6NM WSW Seattle WA

Marine Point Forecast

[NOTICE]

Today
SSW 12kt
1ft
Tonight
SSW 17kt
1-2ft
Tuesday
S 25kt
2ft
Tuesday Night
SSE 26kt⇓
1-3ft
Wednesday
SSW 9kt
1ft
Wednesday Night
NW 9kt⇓
< 1ft
Thursday
SSW 8kt
< 1ft
Thursday Night
SSW 6kt⇓
< 1ft
Friday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:27 pm PDT Apr 12, 2026
Forecast Valid: 5am PDT Apr 13, 2026-6pm PDT Apr 19, 2026

View Nearby Observations

Detailed Forecast

Today

SSW wind around 12 kt. A chance of rain, mainly before 2pm. Waves around 1 ft.

Tonight

SSW wind 12 to 17 kt. A chance of rain, mainly after 4am. Waves 1 to 2 ft.

Tuesday

S wind 18 to 25 kt. Rain. Waves around 2 ft.

Tuesday Night

SSE wind 21 to 26 kt decreasing to 11 to 16 kt after midnight. Rain, mainly before 11pm. Waves 1 to 3 ft.

Wednesday

S wind 7 to 9 kt becoming SW in the afternoon. Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Waves around 1 ft.

Wednesday Night

NW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. A chance of rain before 11pm. Waves 1 ft or less.

Thursday

SSW wind 5 to 8 kt. Mostly sunny. Waves 1 ft or less.

Thursday Night

SSW wind around 6 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.

*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.