FZMY50 PGUM 031806 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 406 AM ChST Fri Jul 4 2025 Marianas Waters out to 40 nautical miles PMZ150-041030- 406 AM ChST Fri Jul 4 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. $$ PMZ151>154-041030- MARIANAS COASTAL WATERS- 406 AM ChST Fri Jul 4 2025 .TODAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds. Isolated thunderstorms, mainly across the northern coastal waters of Saipan. .TONIGHT...Southeast wind 5 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 8 seconds. Scattered showers and isolated thunderstorms across the southern coastal waters of Guam and the northern coastal waters of Saipan. .SATURDAY...South wind 5 kt. Seas around 3 ft. Wave Detail: East 3 ft at 9 seconds. Scattered showers with isolated thunderstorms. .SATURDAY NIGHT...South wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft at 9 seconds and south 2 ft at 3 seconds. Scattered showers with isolated thunderstorms. .SUNDAY THROUGH TUESDAY...South wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail: East 3 ft at 9 seconds and south 3 ft at 4 seconds. A chance of showers with a slight chance of thunderstorms. $$