578
FZMY50 PGUM 221851
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
451 AM ChST Sat Aug 23 2025

Marianas Waters out to 40 nautical miles

PMZ150-230915-
451 AM ChST Sat Aug 23 2025

.Synopsis for Marianas Waters...Trade winds converging into the
Marianas will bring scattered showers and isolated thunderstorms
through Wednesday, or the entire forecast period. 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>154-230915-
MARIANAS COASTAL WATERS-
451 AM ChST Sat Aug 23 2025

.TODAY...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.
.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.
.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
4 ft. Wave Detail: East 4 ft at 8 seconds and east 3 ft at
4 seconds. Scattered showers with a slight chance of
thunderstorms.

$$