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FZMY50 PGUM 290706
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
506 PM ChST Sat Nov 29 2025

Marianas Waters out to 40 nautical miles

PMZ150-292200-
506 PM ChST Sat Nov 29 2025

.Synopsis for Marianas Waters...
Moderate to fresh trades will prevail across the region through
next Wednesday, as a tropical disturbance is expected to bring an
increase in showers and gusts over the next few days. Trade
convergence following this disturbance may prolong showers near
Guam and Rota through the middle of this upcoming week. Combined
seas of 5 to 7 feet are expected to build to 7 to 9 feet Sunday
as northerly swell arrives, generated by a distant low pressure
system.

$$

PMZ151-152-292200-
Guam Coastal Waters-Rota Coastal Waters-
506 PM ChST Sat Nov 29 2025

.TONIGHT...East wind 15 kt. Gusts to 25 kt near showers. Seas 5
to 7 ft. Wave Detail: East 6 ft at 9 seconds, east 3 ft at 5
seconds and north 2 ft at 12 seconds. Scattered showers becoming
numerous late evening. Isolated thunderstorms.
.SUNDAY...East wind 15 to 20 kt. Gusts to 30 kt near showers.
Seas 7 to 9 ft. Wave Detail: East 6 ft at 9 seconds, east 5 ft at
6 seconds and north 4 ft at 12 seconds. Numerous showers with
isolated thunderstorms. Locally heavy showers possible.
.SUNDAY NIGHT...East wind 15 kt with gusts to 25 kt. Seas 6 to
8 ft. Wave Detail: East 5 ft at 9 seconds, north 5 ft at 15
seconds and east 4 ft at 5 seconds. Numerous showers with
isolated thunderstorms.
.MONDAY...Southeast wind 15 kt with gusts to 25 kt. Seas 6 to
8 ft. Wave Detail: North 5 ft at 14 seconds, east 5 ft at
9 seconds and southeast 4 ft at 5 seconds. Numerous showers with
isolated thunderstorms.
.MONDAY NIGHT...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave
Detail: North 5 ft at 13 seconds, east 4 ft at 6 seconds and east
5 ft at 9 seconds. Scattered showers with isolated thunderstorms.
.TUESDAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 9 seconds, northeast 4 ft at 13 seconds and east 3
ft at 5 seconds. Scattered showers with isolated thunderstorms.
.WEDNESDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail: East
7 ft at 9 seconds, east 3 ft at 5 seconds and northeast 3 ft at
13 seconds. A chance of showers.
.THURSDAY...Southeast wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: East 6 ft at 9 seconds, southeast 3 ft at 5 seconds and
northeast 3 ft at 13 seconds. A chance of showers with a slight
chance of thunderstorms.

$$

PMZ153-154-292200-
Tinian Coastal Waters-Saipan Coastal Waters-
506 PM ChST Sat Nov 29 2025

.TONIGHT...East wind 10 to 20 kt. Seas 5 to 8 ft. Wave Detail:
East 6 ft at 9 seconds, east 4 ft at 5 seconds and north 2 ft at
11 seconds. Scattered showers in the evening, then numerous
showers with isolated thunderstorms after midnight.
.SUNDAY...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail:
East 6 ft at 9 seconds, north 4 ft at 12 seconds and east 4 ft at
5 seconds. Numerous showers in the morning, then scattered
showers in the afternoon. Isolated thunderstorms.
.SUNDAY NIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 9 seconds, north 5 ft at 15 seconds and east 3 ft at
5 seconds. Scattered showers with isolated thunderstorms.
.MONDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East 5 ft
at 9 seconds, north 5 ft at 14 seconds and east 3 ft at 5
seconds. Scattered showers with isolated thunderstorms.
.MONDAY NIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 5 ft at 9 seconds, north 5 ft at 14 seconds and east
4 ft at 6 seconds.
.TUESDAY...Southeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 6 ft at 9 seconds, northeast 4 ft at 14 seconds and
southeast 4 ft at 6 seconds.
.WEDNESDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail: East
7 ft at 9 seconds, east 3 ft at 5 seconds and northeast 3 ft at
13 seconds.
.THURSDAY...Southeast wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: East 6 ft at 9 seconds, southeast 3 ft at 5 seconds and
northeast 3 ft at 13 seconds. A chance of showers.

$$