


Coastal Waters Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
439 FZMY50 PGUM 221837 CWFGUM Coastal Waters Forecast for the Mariana Islands National Weather Service Tiyan GU 437 AM ChST Fri May 23 2025 Marianas Waters out to 40 nautical miles PMZ150-231115- 437 AM ChST Fri May 23 2025 .Synopsis for Marianas Waters...Gentle trades continue across the region. Combined seas of 3 to 5 feet will prevail through the weekend. Combined seas may drop by a foot for the beginning of next week. $$ PMZ151>154-231115- MARIANAS COASTAL WATERS- 437 AM ChST Fri May 23 2025 .TODAY...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: Northeast 4 ft at 9 seconds and east 2 ft at 4 seconds. .TONIGHT...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: Northeast 4 ft at 9 seconds and east 2 ft at 4 seconds. .SATURDAY...East wind 5 to 10 kt. Seas around 4 ft. Wave Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds. .SATURDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds. .SUNDAY...East wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and east 3 ft at 4 seconds. .MONDAY THROUGH TUESDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds. A chance of showers. $$