FZMY50 PGUM 220913 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 713 PM ChST Sat Aug 22 2026 Marianas Waters out to 40 nautical miles PMZ150-222015- 713 PM ChST Sat Aug 22 2026 .Synopsis for Marianas Waters... Typhoon Saudel will continue to pass through the far northern Marianas this evening as a Invest 97W develops northwest of Yap. Fresh to locally strong southwest winds will continue to develop across the coastal waters with seas of 7 to 10 feet expected. Scattered showers and isolated thunderstorms expected through midweek, with locally heavy showers possible. $$ PMZ151>154-222015- MARIANAS COASTAL WATERS- 713 PM ChST Sat Aug 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TONIGHT...Southwest wind 10 to 20 kt. Seas 7 to 10 ft. Wave Detail: North 7 ft at 9 seconds, southwest 6 ft at 9 seconds, southwest 3 ft at 5 seconds and southeast 3 ft at 8 seconds. Scattered locally heavy showers with isolated thunderstorms. .SUNDAY...Southwest wind 10 to 20 kt. Seas 9 to 10 ft. Wave Detail: North 6 ft at 9 seconds, southwest 6 ft at 9 seconds, southwest 3 ft at 5 seconds and southeast 3 ft at 8 seconds. Scattered heavy showers with isolated thunderstorms. .SUNDAY NIGHT...Southwest wind 10 to 15 kt. Seas 8 to 10 ft. Wave Detail: Southwest 6 ft at 9 seconds, north 5 ft at 10 seconds, southwest 3 ft at 4 seconds and southeast 3 ft at 8 seconds. Scattered heavy showers with isolated thunderstorms. .MONDAY...Southwest wind 10 to 15 kt. Seas 8 to 9 ft. Wave Detail: Southwest 7 ft at 9 seconds, north 4 ft at 10 seconds, southwest 3 ft at 4 seconds and southeast 3 ft at 8 seconds. Scattered heavy showers with isolated thunderstorms. .MONDAY NIGHT...Southwest wind 5 to 15 kt. Seas 7 to 8 ft. Wave Detail: Southwest 6 ft at 9 seconds, north 4 ft at 10 seconds, southwest 2 ft at 4 seconds and east 2 ft at 11 seconds. Scattered heavy showers with isolated thunderstorms. .TUESDAY...South wind 5 to 10 kt. Seas 5 to 7 ft. Wave Detail: Southwest 6 ft at 9 seconds, northwest 3 ft at 10 seconds, south 2 ft at 4 seconds and east 2 ft at 11 seconds. A chance of heavy showers with a slight chance of thunderstorms. .WEDNESDAY...Southwest wind 5 to 15 kt. Seas 4 to 6 ft. Wave Detail: Southwest 5 ft at 10 seconds, southwest 3 ft at 4 seconds, northwest 2 ft at 10 seconds and east 2 ft at 11 seconds. A chance of showers with a slight chance of thunderstorms. .THURSDAY...Southwest wind 10 to 20 kt. Seas 5 to 7 ft. Wave Detail: West 5 ft at 9 seconds, southwest 4 ft at 5 seconds and east 2 ft at 12 seconds. Showers likely with a slight chance of thunderstorms. $$