FZMY50 PGUM 021854 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 454 AM ChST Tue Feb 3 2026 Marianas Waters out to 40 nautical miles PMZ150-031015- 454 AM ChST Tue Feb 3 2026 .Synopsis for Marianas Waters...The shear line which brought gusty showers and hazardous marine conditions to the Marianas has shifted to the north. A broad trough extending from a tropical disturbance well to the southwest, along with the shear line to the north are expected to maintain an unsettled pattern across the region. Locally heavy showers with stronger gusts at times are expected over the next few days. Seas are expected to gradually subside in the second half of the week, decreasing to 5 to 7 feet by Thursday in response to a decrease in east to northeast winds and swell. $$ PMZ151-152-031015- Guam Coastal Waters-Rota Coastal Waters- 454 AM ChST Tue Feb 3 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... .TODAY...East wind 10 to 20 kt. Seas 7 to 9 ft. Wave Detail: East 7 ft at 8 seconds, north 4 ft at 11 seconds and east 4 ft at 5 seconds. Isolated thunderstorms. Scattered showers this morning, then numerous showers this afternoon. .TONIGHT...East wind 10 to 15 kt with occasional gusts to 25 kt. Seas 6 to 8 ft. Wave Detail: East 6 ft at 8 seconds, east 4 ft at 4 seconds and north 3 ft at 11 seconds. Numerous showers with isolated thunderstorms. Locally heavy showers possible. .WEDNESDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: East 5 ft at 8 seconds, east 3 ft at 4 seconds and north 3 ft at 11 seconds. Scattered showers with isolated thunderstorms. .WEDNESDAY NIGHT...East wind 10 to 15 kt. Seas around 6 ft. Wave Detail: East 4 ft at 8 seconds, north 4 ft at 11 seconds and east 3 ft at 5 seconds. Scattered showers with isolated thunderstorms. .THURSDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: East 5 ft at 8 seconds, north 4 ft at 10 seconds and east 3 ft at 4 seconds. Scattered showers with isolated thunderstorms. .FRIDAY...East wind 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: East 4 ft at 8 seconds, north 4 ft at 10 seconds and east 3 ft at 4 seconds. .SATURDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: East 4 ft at 8 seconds, north 4 ft at 14 seconds and east 3 ft at 4 seconds. A chance of showers. $$ PMZ153-154-031015- Tinian Coastal Waters-Saipan Coastal Waters- 454 AM ChST Tue Feb 3 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... .TODAY...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail: East 7 ft at 8 seconds, north 4 ft at 11 seconds and east 4 ft at 5 seconds. Isolated thunderstorms. Scattered showers this afternoon. .TONIGHT......East wind 10 to 15 kt with occasional gusts to 25 kt. Seas 6 to 8 ft. Wave Detail: East 6 ft at 8 seconds, east 4 ft at 5 seconds and north 3 ft at 11 seconds. Scattered showers with isolated thunderstorms. .WEDNESDAY...Northeast wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: Northeast 5 ft at 8 seconds, northeast 3 ft at 4 seconds and north 3 ft at 11 seconds. Scattered showers with isolated thunderstorms. .WEDNESDAY NIGHT...East wind 10 to 20 kt. Seas 6 to 8 ft. Wave Detail: Northeast 5 ft at 8 seconds, north 4 ft at 11 seconds and east 4 ft at 5 seconds. Scattered showers with isolated thunderstorms. .THURSDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: Northeast 5 ft at 8 seconds, north 4 ft at 10 seconds and east 3 ft at 4 seconds. Isolated thunderstorms. .FRIDAY...East wind 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: East 4 ft at 8 seconds, north 4 ft at 10 seconds and east 3 ft at 4 seconds. .SATURDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: East 4 ft at 8 seconds, north 4 ft at 14 seconds and east 3 ft at 4 seconds. A chance of showers. $$