Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
096 FZMY50 PGUM 311822 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 422 AM ChST Fri Aug 1 2025 Marianas Waters out to 40 nautical miles PMZ150-010800- 422 AM ChST Fri Aug 1 2025 .Synopsis for Marianas Waters...Light to gentle northeasterlies will prevail across the region, as a tropical disturbance brings higher shower and thunderstorm coverage the next few days. Combined seas of 4 to 6 feet, comprised mainly of a lingering west- northwest swell, will continue through the weekend, then decrease next week as said swell slowly subsides. $$ PMZ151>154-010800- MARIANAS COASTAL WATERS- 422 AM ChST Fri Aug 1 2025 .TODAY...Northeast wind 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: West 5 ft at 10 seconds, east 2 ft at 8 seconds and northeast 2 ft at 4 seconds. Numerous showers and isolated thunderstorms. .TONIGHT...Northeast wind 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: West 5 ft at 10 seconds, east 2 ft at 8 seconds and northeast 2 ft at 4 seconds. Scattered showers with isolated thunderstorms. .SATURDAY...North to northeast wind 10 kt. Seas 4 to 6 ft. Wave Detail: West 5 ft at 10 seconds, east 3 ft at 8 seconds and north 2 ft at 4 seconds. Scattered showers with isolated thunderstorms. .SATURDAY NIGHT...North to northeast wind 10 kt. Seas 4 to 6 ft. Wave Detail: West 6 ft at 11 seconds, east 3 ft at 8 seconds and northeast 2 ft at 4 seconds. Scattered showers with isolated thunderstorms. .SUNDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: West 5 ft at 11 seconds, east 3 ft at 8 seconds and east 3 ft at 4 seconds. Scattered showers with isolated thunderstorms. .MONDAY THROUGH TUESDAY...Southeast wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail: West 4 ft at 9 seconds, east 3 ft at 8 seconds and southeast 3 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$