618
FZMY50 PGUM 220600
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Fri Aug 22 2025

Marianas Waters out to 40 nautical miles

PMZ150-222030-
400 PM ChST Fri Aug 22 2025

.Synopsis for Marianas Waters...A trade-wind trough is moving
through the Marianas, bringing scattered showers and isolated
thunderstorms through tonight. Combined seas of 3 to 4 feet and
light to gentle winds are expected over the next few days. Seas
may increase to 3 to 5 feet and winds may increase to gentle to
moderate for next week.

$$

PMZ151>154-222030-
MARIANAS COASTAL WATERS-
400 PM ChST Fri Aug 22 2025

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

$$