605
FZMY50 PGUM 291843
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
443 AM ChST Sun Nov 30 2025

Marianas Waters out to 40 nautical miles

PMZ150-300815-
443 AM ChST Sun Nov 30 2025

.Synopsis for Marianas Waters...
Moderate to fresh trades will prevail across the region through
Tuesday, 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
for an extra day. Combined seas of 6 to 8 feet are expected to
build to 7 to 9 feet by Wednesday as northerly swell arrives,
generated by a distant low pressure system.

$$

PMZ151-152-300815-
Guam Coastal Waters-Rota Coastal Waters-
443 AM ChST Sun Nov 30 2025

.TODAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail: East
6 ft at 9 seconds, east 4 ft at 6 seconds and north 4 ft at
12 seconds. Scattered showers with isolated thunderstorms.
.TONIGHT...East wind 15 kt with gusts to 25 kt. Seas 6 to 8 ft.
Wave Detail: East 5 ft at 10 seconds, north 5 ft at 15 seconds
and east 3 ft at 5 seconds. Scattered 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 4 ft at
10 seconds and southeast 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: North 5 ft at 13 seconds, east 4 ft at 6 seconds and east
4 ft at 11 seconds. Scattered showers with isolated
thunderstorms.
.TUESDAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 10 seconds, northeast 4 ft at 13 seconds and east 3
ft at 5 seconds. A chance of showers.
.WEDNESDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail: East
7 ft at 10 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.

$$

PMZ153-154-300815-
Tinian Coastal Waters-Saipan Coastal Waters-
443 AM ChST Sun Nov 30 2025

.TODAY...East wind 10 to 15 kt. Seas 7 to 9 ft. Wave Detail: East
7 ft at 10 seconds, north 4 ft at 12 seconds and east 3 ft at
5 seconds. Scattered showers with isolated thunderstorms.
.TONIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East
6 ft at 10 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 11 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 11 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 10 seconds, northeast 4 ft at 14 seconds and
southeast 3 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.

$$