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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

      This Afternoon:SSW wind 17 to 19 kt, with gusts as high as 30 kt. Rain. Waves around 1 ft.

      SSW 19kt
      1ft

      Gale Warning
      Gale Warning

    • Tonight

      Tonight:SSW wind 14 to 19 kt becoming SSE 6 to 11 kt after midnight. Winds could gust as high as 29 kt. Rain, mainly before 8pm. Waves 1 ft or less.

      SSW 19kt⇓
      < 1ft

      Gale Warning
      Gale Warning

    • Wednesday

      Wednesday:SSW wind 5 to 11 kt. Rain and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Waves 1 ft or less.

      SSW 11kt
      < 1ft

    • Wednesday Night

      Wednesday Night:WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Showers likely and possibly a thunderstorm before 8pm, then rain likely between 8pm and 11pm. Waves 1 ft or less.

      WSW 7kt⇓
      < 1ft

    • Thursday

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

      ⇑SSW 6kt
      < 1ft

    • Thursday Night

      Thursday Night:SW wind 5 to 8 kt. Partly cloudy. Waves 1 ft or less.

      SW 8kt
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. Partly sunny. Waves 1 ft or less.

      Light Wind
      < 1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

      Light Wind
      < 1ft


Associated Zone Forecast which includes this point

Last Update: 11:27 am PDT Apr 14, 2026
Forecast Valid: 12pm 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 17 to 19 kt, with gusts as high as 30 kt. Rain. Waves around 1 ft.
Tonight
SSW wind 14 to 19 kt becoming SSE 6 to 11 kt after midnight. Winds could gust as high as 29 kt. Rain, mainly before 8pm. Waves 1 ft or less.
Wednesday
SSW wind 5 to 11 kt. Rain and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Waves 1 ft or less.
Wednesday Night
WSW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Showers likely and possibly a thunderstorm before 8pm, then rain likely between 8pm and 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. Mostly cloudy. Waves 1 ft or less.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 47.29°N 122.45°W
Last Update: 11:27 am PDT Apr 14, 2026
Forecast Valid: 12pm PDT Apr 14, 2026-6pm PDT Apr 20, 2026
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