


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
344 FZMY50 PGUM 021848 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 448 AM ChST Thu Jul 3 2025 Marianas Waters out to 40 nautical miles PMZ150-030845- 448 AM ChST Thu Jul 3 2025 .Synopsis for Marianas Waters...As Tropical Storm 04W continues to move away to the north of the Far Northern Marianas, a drier ridge of high pressure has built in. This ridge will bring drier conditions through Friday night. Combined seas of 3 to 4 ft will persist through the forecast period. $$ PMZ151>154-030845- MARIANAS COASTAL WATERS- 448 AM ChST Thu Jul 3 2025 .TODAY...Southeast wind 5 to 10 kt. Seas around 3 ft. Wave Detail: East 3 ft at 9 seconds. Scattered morning showers. .TONIGHT THROUGH FRIDAY NIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 to 4 ft at 9 seconds. .SATURDAY...South wind 5 kt. Seas 3 to 4 ft. Wave Detail: East 4 ft at 9 seconds. A chance of showers with a slight chance of thunderstorms. .SUNDAY THROUGH MONDAY...Southwest wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds and southwest 2 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$