882
FZMY50 PGUM 100701
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
501 PM ChST Wed Dec 10 2025

Marianas Waters out to 40 nautical miles

PMZ150-102100-
501 PM ChST Wed Dec 10 2025

.Synopsis for Marianas Waters...
Moderate to fresh trade winds with occasional strong gusts are
expected through next the few days. Winds near Guam and Rota are
expected to remain moderate to fresh through the beginning of next
week, meanwhile, a shearline is moving through the Far Northern
CNMI and is expected to move into Saipan and Tinian over the next
day or so. Overall combined seas of 6 to 7 feet are expected to
increase by a foot or two for Guam and Rota and seas near Tinian
and Saipan could rise to near 11 feet over the weekend.

$$

PMZ151-152-102100-
Guam Coastal Waters-Rota Coastal Waters-
501 PM ChST Wed Dec 10 2025

.TONIGHT...East wind 15 kt with occasional gusts to 25 kt. Seas 6
to 7 ft. Wave Detail: East 5 ft at 9 seconds, north 4 ft at 10
seconds and east 3 ft at 5 seconds.
.THURSDAY...East wind 15 kt with occasional gusts to 25 kt. Seas
6 to 8 ft. Wave Detail: East 6 ft at 9 seconds, northeast 4 ft at
10 seconds and east 3 ft at 5 seconds.
.THURSDAY NIGHT...East wind 10 to 15 kt. Seas 6 to 7 ft. Wave
Detail: Northeast 6 ft at 9 seconds and east 3 ft at 5 seconds.
.FRIDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: Northeast
6 ft at 8 seconds and east 3 ft at 5 seconds.
.FRIDAY NIGHT...Northeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: Northeast 7 ft at 9 seconds and east 3 ft at 6 seconds.
.SATURDAY...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 8 ft at 9 seconds and east 4 ft at 6 seconds.
.SUNDAY...East wind 15 to 20 kt. Seas 8 to 10 ft. Wave Detail:
Northeast 9 ft at 9 seconds and east 4 ft at 6 seconds.
.MONDAY...East wind 10 to 15 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 8 ft at 10 seconds and east 3 ft at 4 seconds.

$$

PMZ153-154-102100-
Tinian Coastal Waters-Saipan Coastal Waters-
501 PM ChST Wed Dec 10 2025

...SOUTHWARD PROPAGATING SHEARLINE TO BRING INTERMITTENT PERIODS OF
LIGHT RAIN AND BREEZY CONDITIONS AROUND THURSDAY NIGHT...

.TONIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East
6 ft at 9 seconds, north 4 ft at 10 seconds and east 3 ft at
5 seconds.
.THURSDAY...East wind 15 to 20 kt with gusts to 25 kt. Seas 6 to
8 ft. Wave Detail: East 6 ft at 9 seconds, northeast 4 ft at 10
seconds and east 4 ft at 5 seconds. Intermittent light showers.
.THURSDAY NIGHT...East wind 15 to 25 kt with occasional ssgusts
to 30 kt. Seas 6 to 8 ft. Wave Detail: Northeast 6 ft at 8
seconds and east 5 ft at 5 seconds. Intermittent light showers.
.FRIDAY...East wind 15 to 20 kt. Seas 6 to 7 ft. Wave Detail:
Northeast 6 ft at 8 seconds and east 4 ft at 5 seconds.
.FRIDAY NIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: Northeast 7 ft at 9 seconds and east 4 ft at 6 seconds.
.SATURDAY THROUGH SUNDAY...East wind 15 to 20 kt. Seas 8 to
11 ft. Wave Detail: Northeast 10 ft at 8 seconds and east 4 ft at
6 seconds.
.MONDAY...East wind 10 to 15 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 9 ft at 10 seconds and east 3 ft at 4 seconds.

$$