234
FZMY50 PGUM 140610
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
410 PM ChST Mon Sep 14 2026

Marianas Waters out to 40 nautical miles

PMZ150-142115-
410 PM ChST Mon Sep 14 2026

.Synopsis for Marianas Waters...
Light to gentle northeasterlies will shift to the west around
midweek. Combined seas of 3 to 5 ft tonight will gradually build,
potentially peaking to 7 ft after midweek. Scattered showers and
isolated thunderstorms are forecast to continue through Tuesday
night.

$$

PMZ151-152-142115-
Guam Coastal Waters-Rota Coastal Waters-
410 PM ChST Mon Sep 14 2026

.TONIGHT...Northeast to north wind 5 kt. Seas 3 to 5 ft. Wave
Detail: Northeast 5 ft at 9 seconds and northeast 2 ft at 4
seconds. Scattered showers with isolated thunderstorms.
.TUESDAY...Northwest wind 5 to 10 kt. Seas 4 to 6 ft. Wave
Detail: Northeast 5 ft at 9 seconds, northwest 2 ft at 4 seconds
and southeast 3 ft at 8 seconds. Scattered showers with isolated
thunderstorms.
.TUESDAY NIGHT...Northwest wind 10 kt. Seas 4 to 6 ft. Wave
Detail: Northeast 5 ft at 9 seconds, south 3 ft at 8 seconds and
northwest 2 ft at 4 seconds. Scattered showers with isolated
thunderstorms.
.WEDNESDAY...West wind 10 kt. Seas 4 to 6 ft. Wave Detail:
Northeast 5 ft at 10 seconds, south 3 ft at 8 seconds and west 2
ft at 4 seconds.
.WEDNESDAY NIGHT...West wind 10 kt. Seas 4 to 6 ft. Wave Detail:
Northeast 5 ft at 10 seconds, southwest 3 ft at 8 seconds and
west 2 ft at 4 seconds. Isolated thunderstorms.
.THURSDAY THROUGH SATURDAY...Southwest wind 10 to 15 kt. Seas 5
to 7 ft. Wave Detail: Northeast to north 6 ft at 11 seconds,
southwest 3 ft at 8 seconds and southwest 3 ft at 4 seconds. A
chance of showers with a slight chance of thunderstorms.

$$

PMZ153-154-142115-
Tinian Coastal Waters-Saipan Coastal Waters-
410 PM ChST Mon Sep 14 2026

.TONIGHT...Northeast wind 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: Northeast 5 ft at 9 seconds and northeast 3 ft at 4
seconds. Scattered showers with isolated thunderstorms.
.TUESDAY...Northeast wind 5 to 10 kt. Seas 4 to 6 ft. Wave
Detail: Northeast 5 ft at 9 seconds, southeast 3 ft at 8 seconds
and northeast 2 ft at 4 seconds. Scattered showers with isolated
thunderstorms.
.TUESDAY NIGHT...North wind 5 to 10 kt. Seas 5 to 7 ft. Wave
Detail: Northeast 5 ft at 9 seconds, south 3 ft at 8 seconds and
north 2 ft at 4 seconds. Scattered showers with isolated
thunderstorms.
.WEDNESDAY...Northwest wind 10 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 6 ft at 10 seconds, south 3 ft at 8 seconds and
northwest 2 ft at 4 seconds.
.WEDNESDAY NIGHT...Northwest wind 10 kt. Seas 5 to 7 ft. Wave
Detail: Northeast 6 ft at 10 seconds, southwest 3 ft at 8 seconds
and northwest 2 ft at 4 seconds.
.THURSDAY THROUGH FRIDAY...Southwest wind 10 kt. Seas 5 to 7 ft.
Wave Detail: Northeast 6 ft at 11 seconds, southwest 3 ft at
8 seconds and west 2 ft at 4 seconds.
.SATURDAY...Southwest wind 5 to 10 kt. Seas 4 to 6 ft. Wave
Detail: North 5 ft at 10 seconds and southwest 3 ft at 8 seconds.
A chance of showers with a slight chance of thunderstorms.

$$