706
FZMY50 PGUM 051821
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
421 AM ChST Mon Oct 6 2025

Marianas Waters out to 40 nautical miles

PMZ150-060830-
421 AM ChST Mon Oct 6 2025

.Synopsis for Marianas Waters...Combined seas of 3 to 4 feet and
light to gentle winds are expected to build Monday night and
Tuesday as a tropical disturbance (Invest 95W) approaches the
region. Though Invest 95W is expected to remain disorganized, low
visibility due to heavy rain, gusty winds and choppy seas up to 8
feet are possible Tuesday. Seas and winds will then decrease
Wednesday as Invest 95W moves northwest and away from the region.
An approaching TUTT cell will keep isolated thunderstorms in the
forecast for the next several days.

$$

PMZ151>154-060830-
MARIANAS COASTAL WATERS-
421 AM ChST Mon Oct 6 2025

.TODAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 8 seconds. Isolated thunderstorms.
.TONIGHT...East wind 5 to 10 kt, becoming 10 to 20 kt after
midnight. Seas 3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and
east 4 ft at 6 seconds. Scattered showers with isolated
thunderstorms.
.TUESDAY...Southeast wind 10 to 20 kt with gusts to 30 kt. Seas
5 to 8 ft. Wave Detail: Southeast 6 ft at 6 seconds and east 5 ft
at 8 seconds. Numerous showers with isolated thunderstorms.
Locally heavy showers possible.
.TUESDAY NIGHT...South wind 10 to 20 kt. Seas 5 to 7 ft. Wave
Detail: East 5 ft at 8 seconds and south 5 ft at 5 seconds.
Scattered showers with isolated thunderstorms.
.WEDNESDAY...Southeast wind 5 to 15 kt. Seas 3 to 5 ft. Wave
Detail: Southeast 4 ft at 8 seconds and southeast 3 ft at 4
seconds. Isolated thunderstorms.
.THURSDAY...Northeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds and northeast 2 ft at 4 seconds. A
chance of showers with a slight chance of thunderstorms.
.FRIDAY...Northeast wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail:
East 4 ft at 8 seconds and northeast 2 ft at 4 seconds. A chance
of showers.

$$