423
FZMY50 PGUM 271800
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Thu Aug 28 2025

Marianas Waters out to 40 nautical miles

PMZ150-280900-
400 AM ChST Thu Aug 28 2025

.Synopsis for Marianas Waters...Convergent southeast winds will
maintain a wet pattern today before some drying by Friday.
Moisture is set to return over the weekend as a surface trough
approaches and passes by. Moderate southeast winds will briefly
turn east Friday before the surface trough shifts winds back to
south or southeast. Combined seas of 3 to 5 feet will continue
this week.

$$

PMZ151>154-280900-
MARIANAS COASTAL WATERS-
400 AM ChST Thu Aug 28 2025

.TODAY...Southeast wind 10 to 15 kt. Seas around 4 ft. Wave
Detail: East 4 ft at 8 seconds and southeast 2 ft at 4 seconds.
Scattered showers with isolated thunderstorms.
.TONIGHT...East wind 5 to 15 kt. Seas 3 to 5 ft. Wave Detail:
East 3 ft at 8 seconds and east 3 ft at 4 seconds. Isolated
thunderstorms.
.FRIDAY...East wind 10 to 15 kt. Seas 3 to 5 ft. Wave Detail:
East 3 ft at 8 seconds and east 3 ft at 4 seconds. Scattered
showers with isolated thunderstorms.
.FRIDAY NIGHT...East wind 10 to 15 kt. Seas around 5 ft. Wave
Detail: East 4 ft at 8 seconds and east 3 ft at 4 seconds.
Scattered showers with isolated thunderstorms.
.SATURDAY...Southeast wind 5 to 15 kt. Seas 3 to 5 ft. Wave
Detail: East 4 ft at 8 seconds and southeast 3 ft at 4 seconds.
A chance of showers with a slight chance of thunderstorms.
.SUNDAY THROUGH MONDAY...Southeast wind 5 to 15 kt. Seas 3 to
5 ft. Wave Detail: East 4 ft at 8 seconds and south 3 ft at
5 seconds. A chance of showers with a slight chance of
thunderstorms.

$$