Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
997 FZMY50 PGUM 081816 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 416 AM ChST Wed Jul 9 2025 Marianas Waters out to 40 nautical miles PMZ150-091000- 416 AM ChST Wed Jul 9 2025 .Synopsis for Marianas Waters...Light to moderate southerlies subside after today, shifting to a light to gentle southeasterly flow by late week and over the weekend. Combined seas of around 3 feet are expected, building a foot over the weekend due to a slight increase in trade swell and possible west-northwest swell emanating from a distant tropical disturbance to our northwest. $$ PMZ151-152-091000- Guam Coastal Waters-Rota Coastal Waters- 416 AM ChST Wed Jul 9 2025 .TODAY...South wind 5 to 15 kt with gusts to 25 kt near showers. Seas around 3 ft. Wave Detail: East 3 ft at 8 seconds and south 2 ft at 4 seconds. Scattered showers with isolated thunderstorms. Locally heavy showers possible. .TONIGHT...Southeast wind 5 to 10 kt. Seas around 3 ft. Wave Detail: East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated thunderstorms. Scattered showers in the evening. .THURSDAY...Southeast wind 10 kt. Seas around 3 ft. Wave Detail: Southeast 2 ft at 4 seconds and east 2 ft at 8 seconds. Isolated thunderstorms. .THURSDAY NIGHT...Southeast wind 10 kt. Seas around 3 ft. Wave Detail: East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated thunderstorms. .FRIDAY THROUGH SUNDAY...Southeast wind 5 to 10 kt. Seas around 4 ft. Wave Detail: East 4 ft at 8 seconds and south 2 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$ PMZ153-154-091000- Tinian Coastal Waters-Saipan Coastal Waters- 416 AM ChST Wed Jul 9 2025 .TODAY...South wind 10 to 15 kt with gusts to 25 kt near showers. Seas 3 to 4 ft. Wave Detail: East 3 ft at 8 seconds and south 3 ft at 4 seconds. Numerous showers becoming scattered in the afternoon. Isolated thunderstorms. Locally heavy showers possible. .TONIGHT...Southeast wind 5 to 10 kt. Seas around 3 ft. Wave Detail: East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated thunderstorms. Scattered showers in the evening. .THURSDAY...Southeast wind 10 kt. Seas around 3 ft. Wave Detail: Southeast 2 ft at 4 seconds and east 2 ft at 8 seconds. Isolated thunderstorms. .THURSDAY NIGHT...Southeast wind 10 kt. Seas around 3 ft. Wave Detail: East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated thunderstorms. .FRIDAY THROUGH SUNDAY...Southeast wind 5 to 10 kt. Seas around 4 ft. Wave Detail: East 4 ft at 8 seconds and south 2 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$