


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
217 FZMY50 PGUM 030539 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 339 PM ChST Thu Jul 3 2025 Marianas Waters out to 40 nautical miles PMZ150-032000- 339 PM ChST Thu Jul 3 2025 .Synopsis for Marianas Waters...Gentle southeasterlies will prevail across the region the next few days. Combined seas of 3 to 4 feet are expected through much of the weekend, before picking up another foot early next week. $$ PMZ151>154-032000- MARIANAS COASTAL WATERS- 339 PM ChST Thu Jul 3 2025 .TONIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds and southeast 2 ft at 4 seconds. .FRIDAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds and southeast 2 ft at 4 seconds. .FRIDAY NIGHT...Southeast wind 5 kt. Seas around 3 ft. Wave Detail: East 3 ft at 9 seconds. Scattered showers. .SATURDAY...South wind 5 kt. Seas around 3 ft. Wave Detail: East 3 ft at 9 seconds. Scattered showers with isolated thunderstorms. .SATURDAY NIGHT...South wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds and south 2 ft at 3 seconds. Scattered showers with isolated thunderstorms. .SUNDAY THROUGH TUESDAY...South wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail: East 3 ft at 9 seconds and south 3 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$