FZMY50 PGUM 041735

CWFGUM



Coastal Waters Forecast for the Mariana Islands

National Weather Service Tiyan GU

335 AM ChST Wed Aug 5 2026



Marianas Waters out to 40 nautical miles



PMZ150-050800-

335 AM ChST Wed Aug 5 2026



.Synopsis for Marianas Waters...

Fresh to strong westerlies will prevail across the Marianas today,

as a westerly monsoon surge continues. Combined seas of 8 to 11 

feet are expected today, to then drop a foot and persist as such 

for several more days, remaining hazardous to small craft.



$$



PMZ151>154-050800-

MARIANAS COASTAL WATERS-

335 AM ChST Wed Aug 5 2026



...SMALL CRAFT ADVISORY REMAINS IN EFFECT THROUGH EARLY FRIDAY 

MORNING...



.TODAY...Southwest wind 15 to 25 kt. Seas 8 to 11 ft. Wave Detail:

West 7 ft at 9 seconds, north 6 ft at 14 seconds and west 5 ft at

5 seconds. Scattered showers with isolated thunderstorms.

.TONIGHT...West wind 15 to 20 kt. Seas 8 to 10 ft. Wave Detail:

West 7 ft at 11 seconds, north 6 ft at 14 seconds and west 4 ft 

at 5 seconds. Scattered showers with isolated thunderstorms.

.THURSDAY...West wind 10 to 20 kt. Seas 8 to 10 ft. Wave Detail:

West 7 ft at 13 seconds, northwest 6 ft at 14 seconds and west 4 

ft at 4 seconds. Scattered showers with isolated thunderstorms.

.THURSDAY NIGHT...West wind 15 to 20 kt. Seas 8 to 10 ft. Wave 

Detail: West 7 ft at 13 seconds, northwest 6 ft at 14 seconds and

west 4 ft at 5 seconds. Scattered showers with isolated 

thunderstorms.

.FRIDAY...West wind 15 kt. Seas 7 to 9 ft. Wave Detail: Northwest

6 ft at 14 seconds, west 6 ft at 10 seconds and west 3 ft at 5 

seconds. A chance of showers with a slight chance of 

thunderstorms. 

.SATURDAY THROUGH SUNDAY...West wind 15 to 25 kt. Seas 9 to 11 

ft. Wave Detail: West 9 ft at 10 seconds, southwest 6 ft at 7 

seconds and northwest 5 ft at 14 seconds. A chance of showers with

a slight chance of thunderstorms. 



$$