887
FZMY50 PGUM 032048 AAA
CWFGUM

Coastal Waters Forecast for the Mariana Islands...UPDATED
National Weather Service Tiyan GU
648 AM ChST Thu Sep 4 2025

Marianas Waters out to 40 nautical miles

PMZ150-040830-
648 AM ChST Thu Sep 4 2025

.Synopsis for Marianas Waters...Light to moderate winds will
persist through tonight, then becoming light to gentle. Seas of 3
to 4 feet could diminish slightly to between 2 and 3 feet Friday.
Passing trade-wind troughs will bring periods of scattered showers
and isolated thunderstorms today and into early this weekend.

$$

PMZ151-152-040830-
Guam Coastal Waters-Rota Coastal Waters-
648 AM ChST Thu Sep 4 2025

Updated to add isolated thunderstorms for today.

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

$$

PMZ153-154-040830-
Tinian Coastal Waters-Saipan Coastal Waters-
648 AM ChST Thu Sep 4 2025

Updated to add isolated thunderstorms for today.

.REST OF TODAY...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.
.TONIGHT...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
Northeast 3 ft at 9 seconds and east 2 ft at 4 seconds. Scattered
showers with isolated thunderstorms.
.FRIDAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
Northeast 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered
showers with isolated thunderstorms.
.FRIDAY NIGHT...East wind 10 kt. Seas around 3 ft. Wave Detail:
East 2 ft at 4 seconds and northeast 2 ft at 8 seconds. Scattered
showers with isolated thunderstorms.
.SATURDAY...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 a slight chance of thunderstorms.
.SUNDAY...East wind 5 kt. Seas around 3 ft. Wave Detail: East
2 ft at 8 seconds. A slight chance of thunderstorms.
.MONDAY...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.

$$