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

Super 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

Small Craft Advisory in effect from April 14, 06:00 AM PDT until April 15, 02:00 AM PDT

For More Weather Information:

Seattle, WA Local Forecast Office

20NM SW Seattle WA

Marine Point Forecast

[NOTICE]

Today
SSW 20kt
< 1ft

Small Craft Advisory
Tonight
SSW 20kt⇓
< 1ft

Small Craft Advisory
Wednesday
SSW 10kt
< 1ft
Wednesday Night
WNW 9kt⇓
< 1ft
Thursday
⇑SSW 6kt
< 1ft
Thursday Night
SW 8kt
< 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 pm PDT Apr 13, 2026
Forecast Valid: 5am PDT Apr 14, 2026-6pm PDT Apr 20, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM PDT THIS MORNING

Today

SSW wind 15 to 20 kt. Rain, mainly after 8am. Waves 1 ft or less.

Tonight

SSW wind 15 to 20 kt becoming SE 6 to 11 kt after midnight. Rain, mainly before 1am. Waves 1 ft or less.

Wednesday

SSW wind 5 to 10 kt. A chance of rain, then showers and possibly a thunderstorm after 11am. Waves 1 ft or less.

Wednesday Night

WNW 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

Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Thursday Night

SW wind 5 to 8 kt. 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. 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.