


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
064 FZMY50 PGUM 011852 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 452 AM ChST Tue Sep 2 2025 Marianas Waters out to 40 nautical miles PMZ150-021000- 452 AM ChST Tue Sep 2 2025 .Synopsis for Marianas Waters...Expect light to moderate winds over the next few days. Then near the weekend winds are anticipated to fall back to light to gentle. Combined seas of 3 to 5 feet are expected to gradually fall over the week to near 3 feet by the weekend. $$ PMZ151>154-021000- MARIANAS COASTAL WATERS- 452 AM ChST Tue Sep 2 2025 .TODAY...East wind 10 to 15 kt with occasional gusts to 25 kt. Seas 3 to 5 ft. Wave Detail: East 3 ft at 4 seconds and east 3 ft at 8 seconds. Scattered showers with isolated thunderstorms. .TONIGHT...Southeast wind 5 to 15 kt with occasional gusts to 25 kt. Seas 3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and southeast 3 ft at 4 seconds. Scattered showers with isolated thunderstorms. .WEDNESDAY AND WEDNESDAY NIGHT...Southeast wind 5 to 10 kt. Seas around 4 ft. Wave Detail: East 4 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated thunderstorms. .THURSDAY THROUGH SATURDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: Northeast 4 ft at 8 seconds and east 2 ft at 4 seconds. A slight chance of thunderstorms. $$