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 SSW Seattle WA

Marine Point Forecast

[NOTICE]

Today
S 19kt
1ft

Small Craft Advisory
Tonight
SSW 19kt⇓
1ft

Small Craft Advisory
Wednesday
SW 10kt
< 1ft
Wednesday Night
W 9kt⇓
< 1ft
Thursday
Light Wind
< 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 pm PDT Apr 13, 2026
Forecast Valid: 7am 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

S wind 14 to 19 kt, with gusts as high as 25 kt. Rain, mainly after 10am. Waves around 1 ft.

Tonight

SSW wind 14 to 19 kt becoming S 6 to 11 kt after midnight. Rain, mainly before 2am. Waves around 1 ft.

Wednesday

SW wind 5 to 10 kt. 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 5 kt or less. Mostly sunny. Waves 1 ft or less.

Thursday Night

SW wind around 7 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.