FZMY50 PGUM 240656

CWFGUM



Coastal Waters Forecast for the Mariana Islands

National Weather Service Tiyan GU

456 PM ChST Fri Oct 24 2025



Marianas Waters out to 40 nautical miles



PMZ150-242030-

456 PM ChST Fri Oct 24 2025



.Synopsis for Marianas Waters...

Gentle to moderate easterlies will prevail across the region the 

next several days. Combined seas of 4 to 6 feet, comprised of a 

dominant trade swell and pulses of northerly swell and wind waves,

are expected to persist through at least the first half of next

week. A few thunderstorms are possible through Saturday night.



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PMZ151>154-242030-

MARIANAS COASTAL WATERS-

456 PM ChST Fri Oct 24 2025



.TONIGHT...East wind 10 kt. Seas 4 to 5 ft. Wave Detail: 

East 4 ft at 9 seconds, east 2 ft at 4 seconds and north 2 ft at 

10 seconds. Isolated thunderstorms.

.SATURDAY AND SATURDAY NIGHT...East wind 10 kt. Seas 4 to 5 ft. 

Wave Detail: East 4 ft at 9 seconds, east 2 ft at 4 seconds and 

north 2 ft at 10 seconds. Isolated thunderstorms.

.SUNDAY AND SUNDAY NIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft.

Wave Detail: East 4 ft at 9 seconds, north 3 ft at 10 seconds and

east 2 ft at 4 seconds.

.MONDAY THROUGH TUESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft.

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

north 3 ft at 10 seconds.

.WEDNESDAY...East wind 10 kt. Seas 3 to 5 ft. Wave Detail: East

3 ft at 8 seconds, northeast 3 ft at 8 seconds and east 2 ft at

4 seconds.



$$