Last Update: 221 AM PDT Thu Sep 18 2025

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Seattle, WA Local Forecast Office

30NM WSW TTI WA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

Today
NW wind 15 to 20 kt. Seas 7 to 10 ft, subsiding to 6 to 8 ft this afternoon. Wave detail: NW 9 ft at 11 seconds and S 2 ft at 16 seconds.
Tonight
NW wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Seas 5 to 7 ft. Wave detail: NW 7 ft at 10 seconds.
Fri
NW wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Seas 5 to 6 ft. Wave detail: W 5 ft at 9 seconds.
Fri Night
NW wind 5 to 10 kt. Seas 5 to 6 ft. Wave detail: W 6 ft at 12 seconds.
Sat
S wind 5 to 10 kt, rising to 15 to 20 kt in the afternoon. Seas 6 to 7 ft. Wave detail: W 7 ft at 12 seconds. A chance of rain in the morning, then rain in the afternoon.
Sat Night
SW wind 15 to 20 kt, veering to W after midnight. Seas 8 to 9 ft. Wave detail: SW 9 ft at 11 seconds. Rain.
Sun
W wind around 10 kt. Seas around 9 ft. Wave detail: W 9 ft at 11 seconds. A chance of rain.
Sun Night
W wind 5 to 10 kt, backing to S after midnight. Seas 8 to 9 ft. Wave detail: W 9 ft at 11 seconds. A chance of rain after midnight.
Mon
S wind 10 to 15 kt. Seas 7 to 8 ft. Wave detail: W 8 ft at 11 seconds. A chance of rain.
Mon Night
S wind 5 to 10 kt. Seas 7 to 8 ft. Wave detail: W 8 ft at 11 seconds. A chance of rain.



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221 AM PDT Thu Sep 18 2025
 
 

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