896
FZMY50 PGUM 301739
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
339 AM ChST Sun Aug 31 2025

Marianas Waters out to 40 nautical miles

PMZ150-310915-
339 AM ChST Sun Aug 31 2025

.Synopsis for Marianas Waters...Light to moderate southerlies are
expected today, with occasionally strong gusts possible near
heavier showers tonight. Combined seas of 4 to 6 feet are expected
to taper down a foot by Monday, then perhaps another foot around
Thursday as trade swell and wind waves diminish.

$$

PMZ151>154-310915-
MARIANAS COASTAL WATERS-
339 AM ChST Sun Aug 31 2025

.TODAY...South wind 5 to 15 kt with gusts to 25 kt. Seas around
6 ft. Wave Detail: Southeast 6 ft at 8 seconds and south 2 ft at
4 seconds. Scattered showers with isolated thunderstorms.
.TONIGHT...East wind 5 to 10 kt. Seas around 5 ft. Wave Detail:
South 5 ft at 8 seconds and east 2 ft at 4 seconds.
.MONDAY...Northeast wind 10 to 15 kt. Seas around 4 ft. Wave
Detail: South 4 ft at 8 seconds. Scattered showers.
.MONDAY NIGHT...Northeast wind 10 to 20 kt. Seas 3 to 5 ft. Wave
Detail: South 4 ft at 8 seconds and northeast 2 ft at 5 seconds.
Scattered showers with isolated thunderstorms.
.TUESDAY THROUGH WEDNESDAY...Southeast wind 10 to 15 kt. Seas
3 to 5 ft. Wave Detail: South 4 ft at 8 seconds and east 2 ft at
4 seconds. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds. A chance of
showers.

$$