Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
418 FZMY50 PGUM 081814 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 414 AM ChST Sun Nov 9 2025 Marianas Waters out to 40 nautical miles PMZ150-090815- 414 AM ChST Sun Nov 9 2025 .Synopsis for Marianas Waters... Gentle to moderate southeasterlies will prevail across the Marianas through the end of the week. Combined seas of 5 to 7 feet, comprised of lingering southerly swell, background easterly swells and localized wind waves, are expected to persist for several days, before relaxing 1 to 2 feet by the middle of next week. $$ PMZ151>154-090815- MARIANAS COASTAL WATERS- 414 AM ChST Sun Nov 9 2025 .TODAY...East to southeast wind 10 kt. Seas 5 to 7 ft. Wave Detail: East 5 ft at 9 seconds, west 3 ft at 9 seconds and southeast 3 ft at 4 seconds. Scattered showers. .TONIGHT...East wind 10 kt. Seas 6 to 7 ft. Wave Detail: East 5 ft at 10 seconds, west 3 ft at 9 seconds, north 3 ft at 11 seconds and east 2 ft at 4 seconds. .MONDAY...East wind 10 kt. Seas 6 to 7 ft. Wave Detail: East 4 ft at 10 seconds, west 4 ft at 11 seconds, north 3 ft at 11 seconds and east 2 ft at 4 seconds. Scattered showers. .MONDAY NIGHT...East wind 10 kt. Seas 5 to 7 ft. Wave Detail: West 4 ft at 10 seconds, north 4 ft at 10 seconds, east 3 ft at 11 seconds and east 2 ft at 4 seconds. .TUESDAY THROUGH THURSDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: North 4 ft at 11 seconds, east 3 ft at 4 seconds and west 3 ft at 11 seconds. $$