627
FZMY50 PGUM 301834
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
434 AM ChST Thu Jul 31 2025

Marianas Waters out to 40 nautical miles

PMZ150-311000-
434 AM ChST Thu Jul 31 2025

.Synopsis for Marianas Waters...Generally light winds are expected
for the next few days, as a ridging pattern settles across the
area. Combined seas of 4 to 6 feet comprised mainly of a west-
northwest swell, will continue to decrease as said swell continues
to diminish.

$$

PMZ151>154-311000-
MARIANAS COASTAL WATERS-
434 AM ChST Thu Jul 31 2025

.TODAY...Variable wind 5 kt. Seas 4 to 6 ft. Wave Detail: West 6
ft at 9 seconds and east 2 ft at 8 seconds. Scattered showers and
isolated thunderstorms in the afternoon.
.TONIGHT...Variable wind 5 kt. Seas 4 to 6 ft. Wave Detail: West
6 ft at 9 seconds and east 2 ft at 8 seconds.
.FRIDAY...South wind 5 kt. Seas 4 to 6 ft. Wave Detail: West 5 ft
at 9 seconds and east 2 ft at 8 seconds. Isolated thunderstorms.
.FRIDAY NIGHT...East wind 5 kt. Seas 4 to 6 ft. Wave Detail: West
5 ft at 9 seconds and east 2 ft at 8 seconds. Isolated
thunderstorms.
.SATURDAY THROUGH SUNDAY...Northeast wind 10 kt. Seas 4 to 6 ft.
Wave Detail: Northwest 5 ft at 11 seconds, east 3 ft at 9
seconds, and northeast 2 ft at 4 seconds. A slight chance of
thunderstorms.
.MONDAY...East wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail:
Northwest 4 ft at 9 seconds, east 3 ft at 9 seconds, and east 2
ft at 4 seconds. A chance of showers with a slight chance of
thunderstorms.

$$