FZMY50 PGUM 271756

CWFGUM



Coastal Waters Forecast for the Mariana Islands

National Weather Service Tiyan GU

356 AM ChST Tue Oct 28 2025



Marianas Waters out to 40 nautical miles



PMZ150-280900-

356 AM ChST Tue Oct 28 2025



.Synopsis for Marianas Waters...

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

expected to persist through the week. Shower and thunderstorm

potential will start to increase Wednesday as an upper-level low

moves north of the Marianas and a surface trough approaches from 

the east-southeast.



$$



PMZ151>154-280900-

MARIANAS COASTAL WATERS-

356 AM ChST Tue Oct 28 2025



.TODAY...East wind 10 to 15 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. 

.TONIGHT...East wind 10 to 15 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...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. A slight chance of thunderstorms.

.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.  



$$