


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
143 FZMY50 PGUM 140600 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 400 PM ChST Wed May 14 2025 Marianas Waters out to 40 nautical miles PMZ150-142100- 400 PM ChST Wed May 14 2025 .Synopsis for Marianas Waters...Gentle to moderate trade winds and combined seas of 4 to 6 feet will persist through the weekend. $$ PMZ151>154-142100- MARIANAS COASTAL WATERS- 400 PM ChST Wed May 14 2025 .TONIGHT...East wind 15 kt. Seas 5 to 6 ft. Wave Detail: East 4 ft at 8 seconds, east 3 ft at 5 seconds and northeast 3 ft at 11 seconds. .THURSDAY THROUGH FRIDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: East 5 ft at 8 seconds and east 3 ft at 4 seconds. .FRIDAY NIGHT THROUGH MONDAY...East wind 15 kt. Seas 4 to 6 ft. Wave Detail: East 5 ft at 8 seconds and east 3 ft at 5 seconds. $$