208
FZMY50 PGUM 031809
CWFGUM

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

Marianas Waters out to 40 nautical miles

PMZ150-041000-
409 AM ChST Mon Aug 4 2025

.Synopsis for Marianas Waters...Gentle to moderate southeasterlies
are expected to persist the next few days as a weak circulation
continues to move west away from the Marianas. Combined seas of 4
to 6 feet, comprised mainly of two swells, the trade-wind swell
and a secondary west-northwest swell. The west-northwest swell
will continue to decrease slowly as the week progresses.

$$

PMZ151>154-041000-
MARIANAS COASTAL WATERS-
409 AM ChST Mon Aug 4 2025

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

$$