106
FZMY50 PGUM 031806
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
406 AM ChST Tue Nov 4 2025

Marianas Waters out to 40 nautical miles

PMZ150-041015-
406 AM ChST Tue Nov 4 2025

.Synopsis for Marianas Waters...
Moderate to fresh trades will prevail to become fresh to strong
Wednesday. Combined seas of 5 to 8 feet are expected to increase
slowly over the next several days, before picking up suddenly
during 90W`s passage, potentially producing sea conditions
hazardous to small craft by late Wednesday.

$$

PMZ151-152-041015-
Guam Coastal Waters-Rota Coastal Waters-
406 AM ChST Tue Nov 4 2025

.TODAY...East wind 15 to 20 kt. Seas 5 to 7 ft. Wave Detail: East
5 ft at 9 seconds and east 4 ft at 6 seconds. Scattered showers
with isolated thunderstorms.
.TONIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 9 seconds and east 5 ft at 5 seconds. Scattered
showers with isolated thunderstorms.
.WEDNESDAY...East wind 15 to 25 kt. Seas 7 to 9 ft. Wave Detail:
East 6 ft at 9 seconds and east 6 ft at 6 seconds. Scattered
showers with isolated thunderstorms.
.WEDNESDAY NIGHT...East wind 20 to 30 kt. Seas 8 to 10 ft. Wave
Detail: East 7 ft at 9 seconds and east 7 ft at 6 seconds.
Numerous locally heavy showers with scattered thunderstorms.
.THURSDAY...Southeast wind 20 to 30 kt. Seas 8 to 10 ft. Wave
Detail: Southeast 7 ft at 9 seconds and east 7 ft at 6 seconds.
Widespread locally heavy showers with scattered thunderstorms.
.FRIDAY...South wind 20 to 25 kt. Seas 9 to 11 ft. Wave Detail:
Southeast 8 ft at 10 seconds and south 7 ft at 6 seconds.
Numerous showers with a slight chance of thunderstorms.
.SATURDAY...Southeast wind 15 to 20 kt. Seas 9 to 11 ft. Wave
Detail: South 8 ft at 10 seconds, southeast 7 ft at 6 seconds and
east 4 ft at 9 seconds. A chance of showers with a slight chance
of thunderstorms.

$$

PMZ153-154-041015-
Tinian Coastal Waters-Saipan Coastal Waters-
406 AM ChST Tue Nov 4 2025

.TODAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail: East
6 ft at 9 seconds and east 5 ft at 5 seconds. Scattered showers
with isolated thunderstorms.
.TONIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 9 seconds and east 3 ft at 5 seconds. Scattered
showers with isolated thunderstorms.
.WEDNESDAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 7 ft at 9 seconds and east 5 ft at 5 seconds. Scattered
showers with isolated thunderstorms.
.WEDNESDAY NIGHT...East wind 15 to 25 kt. Seas 7 to 9 ft. Wave
Detail: East 7 ft at 9 seconds and east 6 ft at 6 seconds.
Scattered showers with isolated thunderstorms.
.THURSDAY...Southeast wind 20 to 25 kt. Seas 8 to 10 ft. Wave
Detail: Southeast 7 ft at 8 seconds, east 4 ft at 9 seconds and
southeast 6 ft at 6 seconds. Numerous showers with scattered
thunderstorms.
.FRIDAY...Southeast wind 20 to 25 kt. Seas 9 to 11 ft. Wave
Detail: East 7 ft at 9 seconds, southeast 5 ft at 8 seconds, and
southeast 6 ft at 6 seconds. Numerous showers with a slight chance
of thunderstorms.
.SATURDAY...Southeast wind 15 to 20 kt. Seas 9 to 11 ft. Wave
Detail: East 7 ft at 9 seconds, southeast 5 ft at 8 seconds, and
southeast 6 ft at 6 seconds. Numerous showers with a slight chance
of thunderstorms.

$$