Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Hazardous Weather Conditions

For More Weather Information:

Seattle, WA Local Forecast Office

20NM SSW Seattle WA

Marine Point Forecast

[NOTICE]

This Afternoon
SSW 17kt
< 1ft

Gale Warning
Tonight
SW 15kt⇓
< 1ft

Gale Warning
Wednesday
⇑SW 9kt
< 1ft
Wednesday Night
W 6kt⇓
< 1ft
Thursday
⇑SW 6kt
< 1ft
Thursday Night
SW 7kt⇓
< 1ft
Friday
Light Wind
< 1ft
Friday Night
Light Wind
< 1ft
Saturday
Light Wind
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:27 am PDT Apr 14, 2026
Forecast Valid: 1pm PDT Apr 14, 2026-6pm PDT Apr 20, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON...

This Afternoon

SSW wind around 17 kt, with gusts as high as 30 kt. Rain. Waves 1 ft or less.

Tonight

SW wind 10 to 15 kt becoming variable and less than 5 kt after midnight. Winds could gust as high as 28 kt. Rain, mainly before 1am. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming SW 5 to 9 kt in the morning. A chance of rain and thunderstorms, then showers and possibly a thunderstorm after noon. Waves 1 ft or less.

Wednesday Night

W wind around 6 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 SW around 6 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Thursday Night

SW wind 5 to 7 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. Mostly cloudy. 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.