Last Update: 459 AM ChST Mon Sep 22 2025

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Tiyan, GU Local Forecast Office

18NM SE Andersen AFB GU

Marine Zone Forecast


Today
East wind 5 to 15 kt with occasional gusts to 25 kt. seas 5 to 6 ft. Wave detail: west 4 ft at 10 seconds, east 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered showers with isolated thunderstorms.
Tonight
East wind 5 to 15 kt. Seas 4 to 6 ft. Wave detail: east 3 ft at 8 seconds, northeast 3 ft at 10 seconds and east 2 ft at 4 seconds. Scattered showers with isolated thunderstorms.
Tuesday
East wind 10 kt. Seas around 5 ft. Wave detail: north 4 ft at 10 seconds, east 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered showers.
Tuesday Night
East wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: north 4 ft at 11 seconds, east 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered showers.
Wednesday
East wind 10 kt. Seas 4 to 6 ft. Wave detail: north 4 ft at 10 seconds, east 3 ft at 8 seconds and east 2 ft at 4 seconds.
Thursday
Southeast wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: northeast 5 ft at 11 seconds, east 3 ft at 8 seconds and east 2 ft at 4 seconds.
Friday
Southeast wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: northeast 5 ft at 12 seconds and southeast 2 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms.



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459 AM ChST Mon Sep 22 2025
 
 

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