469
FZMY50 PGUM 241842
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
442 AM ChST Mon Aug 25 2025

Marianas Waters out to 40 nautical miles

PMZ150-250900-
442 AM ChST Mon Aug 25 2025

.Synopsis for Marianas Waters...Trade winds converging into the
Marianas will bring more scattered showers and isolated thunderstorms
through at least Thursday with a lull through tonight. Combined
seas of 3 to 5 feet will continue this week throughout the
Marianas Waters. Light to gentle winds today are expected to build
to Monday. Seas should increase to 3 to 5 feet and winds should
increase to gentle to moderate from Monday night on.

$$

PMZ151>154-250900-
MARIANAS COASTAL WATERS-
442 AM ChST Mon Aug 25 2025

.TODAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds. Isolated thunderstorms.
.TONIGHT...East wind 10 to 20 kt with gusts to 30 kt. Seas 3 to
4 ft. Wave Detail: East 3 ft at 4 seconds and east 2 ft at
8 seconds. Isolated thunderstorms.
.TUESDAY...East wind 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 4 seconds and east 3 ft at 8 seconds. Scattered
showers with isolated thunderstorms.
.TUESDAY NIGHT...Southeast wind 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: Southeast 3 ft at 5 seconds and east 3 ft at 8 seconds.
Scattered showers with isolated thunderstorms.
.WEDNESDAY THROUGH THURSDAY...East wind 5 to 15 kt. Seas 3 to
5 ft. Wave Detail: Southeast 3 ft at 4 seconds and east 3 ft at
8 seconds. Scattered showers with a slight chance of
thunderstorms.
.FRIDAY...East wind 10 kt. Seas 3 to 5 ft. Wave Detail: East 4 ft
at 8 seconds and east 2 ft at 4 seconds. A slight chance of
thunderstorms.

$$