


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
204 FZMY50 PGUM 100541 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU Issued by National Weather Service Honolulu HI 341 PM ChST Thu Jul 10 2025 Marianas Waters out to 40 nautical miles PMZ150-102015- 341 PM ChST Thu Jul 10 2025 .Synopsis for Marianas Waters...Nearby monsoon and trade wind patterns will maintain light to gentle southeasterlies and periods of scattered showers and isolated thunderstorms through early next week. Combined seas of around 3 feet build to 3 to 5 feet by the weekend due to a slight increase in trade swell and the arrival of southwest swell. $$ PMZ151-152-102015- Guam Coastal Waters-Rota Coastal Waters- 341 PM ChST Thu Jul 10 2025 .TONIGHT...Southeast wind 5 to 10 kt. Seas around 3 ft. .FRIDAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. .FRIDAY NIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Scattered showers with isolated thunderstorms. .SATURDAY...Southeast wind 10 kt. Seas 3 to 5 ft. Scattered showers with isolated thunderstorms. .SATURDAY NIGHT...Southeast wind 5 to 10 kt. Seas 3 to 5 ft. Scattered showers with isolated thunderstorms. .SUNDAY THROUGH TUESDAY...Southeast wind 5 to 10 kt. Seas 3 to 5 ft. A chance of showers with a slight chance of thunderstorms. $$ PMZ153-154-102015- Tinian Coastal Waters-Saipan Coastal Waters- 341 PM ChST Thu Jul 10 2025 .TONIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Isolated thunderstorms. .FRIDAY...Southeast wind 5 to 10 kt. Seas around 4 ft. Isolated thunderstorms. .FRIDAY NIGHT...Southeast wind 5 to 10 kt. Seas 3 to 5 ft. Scattered showers with isolated thunderstorms. .SATURDAY...Southeast wind 10 kt. Seas 4 to 5 ft. Scattered showers with isolated thunderstorms. .SATURDAY NIGHT...Southeast wind 10 kt. Seas 4 to 5 ft. Scattered showers with isolated thunderstorms. .SUNDAY THROUGH TUESDAY...Southeast wind 5 to 15 kt. Seas 4 to 5 ft. A chance of showers with a slight chance of thunderstorms. $$