Coastal Waters Forecast for Guam Coastal Waters (PMZ151) (Text-Only)
NWS Forecast for: Guam Coastal Waters (PMZ151)
Issued by: National Weather Service Tiyan, GU
Last Update: 522 PM ChST Sat Oct 3 2026




Tonight: Southwest wind to 25 to 30 kt with occasional gusts to 40 kt. Seas 13 to 15 ft. Scattered showers with isolated thunderstorms. Locally heavy showers possible.

Sunday: Southwest wind 20 to 30 kt with occasional gusts to 40 kt. Seas 12 to 14 ft. Scattered showers.

Sunday Night: Southwest wind 20 to 25 kt. Seas 10 to 12 ft. wave detail: southwest 9 ft at 8 seconds, southwest 7 ft at 6 seconds and northwest 4 ft at 13 seconds. Scattered showers.

Monday: Southwest wind 20 to 25 kt. Seas 9 to 11 ft. Wave detail: southwest 8 ft at 8 seconds, southwest 7 ft at 8 seconds and northwest 4 ft at 13 seconds. Scattered showers.

Monday Night: Southwest wind 15 to 25 kt. Seas 8 to 10 ft. Wave detail: southwest 7 ft at 8 seconds, southwest 6 ft at 8 seconds and northwest 4 ft at 13 seconds. Scattered showers with isolated thunderstorms.

Tuesday: Southwest wind 15 to 20 kt. Seas 7 to 9 ft. Wave detail: southwest 7 ft at 9 seconds, southwest 5 ft at 7 seconds and northwest 4 ft at 13 seconds. Showers likely with a slight chance of thunderstorms.

Wednesday: Southwest wind 10 to 20 kt. Seas 5 to 8 ft. Wave detail: northwest 5 ft at 11 seconds, southwest 4 ft at 13 seconds and southwest 4 ft at 5 seconds. Showers likely with a slight chance of thunderstorms.

Thursday: Southwest wind 10 to 15 kt. Seas around 5 to 6 ft. wave detail: northwest 4 ft at 10 seconds, southwest 3 ft at 4 seconds and southwest 3 ft at 13 seconds. A chance of showers with a slight chance of thunderstorms.







Zone Forecast: Guam Coastal Waters (PMZ151)

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