923
FZMY50 PGUM 040625
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
425 PM ChST Mon Aug 4 2025

Marianas Waters out to 40 nautical miles

PMZ150-042100-
425 PM ChST Mon Aug 4 2025

.Synopsis for Marianas Waters...Gentle to moderate east to
southeast winds are expected to persist the next few days as a
weak circulation continues to move west away from the Marianas.
Combined seas of 3 to 4 feet will continue into the weekend.

$$

PMZ151-042100-
Guam Coastal Waters-
425 PM ChST Mon Aug 4 2025

.TONIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds, southeast 2 ft at 4 seconds and
west 2 ft at 9 seconds. Isolated thunderstorms. Scattered showers
developing during the evening.
.TUESDAY...East wind 5 kt. Seas 3 to 4 ft. Wave Detail: East 3 ft
at 8 seconds and west 2 ft at 8 seconds. Scattered showers with
isolated thunderstorms.
.TUESDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds, east 2 ft at 4 seconds and west 2
ft at 8 seconds. Scattered showers with isolated thunderstorms.
.WEDNESDAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds, southeast 2 ft at 4 seconds and
west 2 ft at 8 seconds. Scattered showers with isolated
thunderstorms.
.WEDNESDAY NIGHT...South wind 5 to 10 kt. Seas around 3 ft. Wave
Detail: South 2 ft at 4 seconds, west 2 ft at 8 seconds and east
2 ft at 8 seconds. Scattered showers with isolated thunderstorms.
.THURSDAY...South wind 5 kt. Seas around 3 ft. Wave Detail: East
3 ft at 8 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY AND SATURDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds and east 2 ft at 4 seconds.

$$

PMZ152>154-042100-
Rota Coastal Waters-Tinian Coastal Waters-Saipan Coastal Waters-
425 PM ChST Mon Aug 4 2025

.TONIGHT...East wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail:
East 4 ft at 8 seconds, east 3 ft at 4 seconds and west 2 ft at
9 seconds. Scattered showers with isolated thunderstorms.
.TUESDAY...East wind 5 to 10 kt. Seas around 4 ft. Wave Detail:
East 4 ft at 8 seconds, east 2 ft at 4 seconds and west 2 ft at
8 seconds. Scattered showers with isolated thunderstorms.
.TUESDAY NIGHT...East wind 5 to 10 kt. Seas around 4 ft. Wave
Detail: East 3 ft at 8 seconds, east 2 ft at 4 seconds and west
2 ft at 8 seconds. Scattered showers with isolated thunderstorms.
.WEDNESDAY...Southeast wind 5 to 10 kt. Seas around 4 ft. Wave
Detail: East 3 ft at 8 seconds, southeast 2 ft at 4 seconds and
west 2 ft at 8 seconds. Scattered showers with isolated
thunderstorms.
.WEDNESDAY NIGHT...South wind 5 to 10 kt. Seas around 3 ft. Wave
Detail: West 2 ft at 8 seconds, east 2 ft at 8 seconds and south 2
ft at 4 seconds. Scattered showers with isolated thunderstorms.
.THURSDAY...South wind 5 kt. Seas around 3 ft. Wave Detail: East
3 ft at 8 seconds. A chance of showers with a slight chance of
thunderstorms.
.FRIDAY...Southeast wind 5 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds. A slight chance of thunderstorms.
.SATURDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 4 ft at 8 seconds and east 2 ft at 4 seconds.

$$