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18NM NW Seattle WA

[NOTICE]

Last Update: 1:20 am PDT Apr 16, 2026
Forecast Valid: 1am PDT Apr 16, 2026-6pm PDT Apr 22, 2026

Thursday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. 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.

Saturday Night

Variable winds 5 kt or less. A chance of rain, mainly after 11pm. Waves 1 ft or less.

Sunday

Variable winds 5 kt or less. A chance of rain. Waves 1 ft or less.

Sunday Night

Variable winds 5 kt or less. A slight chance of rain. Waves 1 ft or less.

Monday

Variable winds less than 5 kt becoming N around 6 kt in the afternoon. A slight chance of rain. Waves 1 ft or less.

Winds and waves higher in and near tstms.

*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.