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FZMY50 PGUM 141328 AAA
CWFGUM

Coastal Waters Forecast for the Mariana Islands...UPDATED
National Weather Service Tiyan GU
1128 PM ChST Tue Oct 14 2025

Marianas Waters out to 40 nautical miles

PMZ150-142100-
1128 PM ChST Tue Oct 14 2025

.Synopsis for Marianas Waters...
Fresh to occasionally strong southeasterlies are expected in Guam
and Rota waters through late Wednesday night, while remaining
moderate to fresh at Tinian and Saipan during the passage of
Invest 96W. Combined seas of 6 to 8 feet near Guam and Rota, and 5
to 7 feet near Tinian and Saipan tonight, will taper down a few
feet by Thursday once wind waves decrease after Invest 96W`s
passage.

$$

PMZ151-152-142100-
Guam Coastal Waters-Rota Coastal Waters-
1128 PM ChST Tue Oct 14 2025

Updated to reduce the widespread heavy showers tonight.

...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY
MORNING...

.REST OF TONIGHT...Southeast wind 15 to 25 kt. Seas 6 to 8 ft.
Wave Detail: Southeast 5 ft at 5 seconds, east 4 ft at 8 seconds and
north 4 ft at 13 seconds. Numerous showers with isolated
thunderstorms.
.WEDNESDAY...Southeast wind 15 to 25 kt. Seas to 6 to 8 ft. Wave
Detail: Southeast 5 ft at 5 seconds, north 4 ft at 12 seconds and
east 3 ft at 8 seconds. Widespread heavy showers with isolated
thunderstorms.
.WEDNESDAY NIGHT...East wind 15 to 25 kt. Seas around 6 to 8 ft.
Wave Detail: East 5 ft at 7 seconds, north 3 ft at 12 seconds and
east 2 ft at 4 seconds. Numerous showers with isolated
thunderstorms.
.THURSDAY...East wind 10 to 20 kt. Seas around 5 to 7 ft. Wave
Detail: East 4 ft at 5 seconds, east 3 ft at 8 seconds and north
3 ft at 12 seconds. Scattered showers with isolated thunderstorms.
.THURSDAY NIGHT...East wind 10 to 15 kt. Seas around 5 to 7 ft.
Wave Detail: East 3 ft at 4 seconds, east 3 ft at 8 seconds and
north 3 ft at 12 seconds.
.FRIDAY...East wind 10 to 15 kt. Seas 5 to 6 ft. Wave Detail:
East 4 ft at 8 seconds, north 4 ft at 12 seconds and east 3 ft at
5 seconds.
.SATURDAY THROUGH SUNDAY...East wind 10 to 15 kt. Seas 5 to 6 ft.
Wave Detail: East 4 ft at 10 seconds, north 4 ft at 12 seconds
and east 3 ft at 4 seconds. A chance of showers.

$$

PMZ153-154-142100-
Tinian Coastal Waters-Saipan Coastal Waters-
1128 PM ChST Tue Oct 14 2025

.TONIGHT...Southeast wind 15 to 20 kt. Seas 5 to 7 ft. Wave Detail:
East 4 ft at 8 seconds, north 4 ft at 13 seconds and east 4 ft at
5 seconds. Scattered showers with isolated thunderstorms.
.WEDNESDAY...East wind 10 to 20 kt. Seas around 5 to 6 ft. Wave
Detail: East 4 ft at 8 seconds, north 4 ft at 12 seconds and east
4 ft at 5 seconds. Numerous showers with isolated thunderstorms.
.WEDNESDAY NIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: East 4 ft at 7 seconds, east 3 ft at 4 seconds and north
3 ft at 12 seconds. Numerous showers with isolated thunderstorms.
.THURSDAY...East wind 10 to 15 kt. Seas around 4 to 6 ft. Wave
Detail: East 3 ft at 5 seconds, east 3 ft at 7 seconds and north
3 ft at 12 seconds. Scattered showers with isolated thunderstorms.
.THURSDAY NIGHT...East wind 10 to 20 kt. Seas 4 to 6 ft. Wave
Detail: East 4 ft at 7 seconds, east 4 ft at 5 seconds and north
3 ft at 12 seconds.
.FRIDAY...East wind 15 to 20 kt. Seas 5 to 7 ft. Wave Detail:
East 4 ft at 10 seconds, north 4 ft at 12 seconds and east 3 ft
at 5 seconds.
.SATURDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: East
5 ft at 10 seconds, north 4 ft at 12 seconds and east 3 ft at
5 seconds. A chance of showers.
.SUNDAY...East wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail:
East 5 ft at 9 seconds, northeast 4 ft at 10 seconds and east 3 ft
at 5 seconds. A chance of showers.

$$