FZMY50 PGUM 270600

CWFGUM



Coastal Waters Forecast for the Mariana Islands

National Weather Service Tiyan GU

400 PM ChST Mon Oct 27 2025



Marianas Waters out to 40 nautical miles



PMZ150-272100-

400 PM ChST Mon Oct 27 2025



.Synopsis for Marianas Waters...

Gentle to moderate winds and combined seas of 4 to 6 feet are 

expected to persist through the week. There is a slight chance of 

thunderstorms Wednesday into Thursday.



$$



PMZ151>154-272100-

MARIANAS COASTAL WATERS-

400 PM ChST Mon Oct 27 2025



.TONIGHT...East wind 10 to 15 kt. Seas around 4 to 6 ft. Wave 

Detail: East 5 ft at 9 seconds, east 3 ft at 4 seconds and north 

2 ft at 9 seconds. 

.TUESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:

East 5 ft at 9 seconds, east 3 ft at 4 seconds and northeast 2 ft

at 9 seconds. 

.TUESDAY NIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave 

Detail: East 5 ft at 10 seconds, east 3 ft at 4 seconds and 

northeast 2 ft at 9 seconds. 

.WEDNESDAY...East wind 10 kt. Seas 4 to 6 ft. Wave Detail: East

5 ft at 9 seconds, east 2 ft at 4 seconds and northeast 2 ft at

9 seconds. 

.WEDNESDAY NIGHT...East wind 10 kt. Seas 4 to 6 ft. Wave Detail:

East 5 ft at 9 seconds, east 2 ft at 4 seconds and northeast 2 ft

at 9 seconds. Isolated thunderstorms. 

.THURSDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:

East 5 ft at 9 seconds, east 3 ft at 4 seconds and northeast 2 ft

at 9 seconds. A chance of showers with isolated thunderstorms. 

.FRIDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:

East 5 ft at 9 seconds and east 3 ft at 4 seconds. A chance of

showers. 

.SATURDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:

East 5 ft at 9 seconds and east 3 ft at 4 seconds. A slight 

chance of thunderstorms. 



$$