646
FZMY50 PGUM 081703
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
303 AM ChST Thu Oct 9 2025

Marianas Waters out to 40 nautical miles

PMZ150-090700-
303 AM ChST Thu Oct 9 2025

.Synopsis for Marianas Waters...Light to gentle winds the next few
days will become moderate by Sunday. Combined seas of 3 to 5 feet
will persist through Friday, building this weekend, becoming 5 to
7 feet, as a long-period north swell moves through the region.

$$

PMZ151>154-090700-
MARIANAS COASTAL WATERS-
303 AM ChST Thu Oct 9 2025

.TODAY...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. Isolated
thunderstorms.
.TONIGHT...Northeast wind 10 kt. Seas 3 to 5 ft. Wave Detail:
East 4 ft at 8 seconds and northeast 2 ft at 4 seconds. Scattered
showers with isolated thunderstorms.
.FRIDAY...East wind 5 to 10 kt. Seas around 3 to 5 ft. Wave
Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds.
Isolated thunderstorms.
.FRIDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave
Detail: Northeast 4 ft at 8 seconds and east 2 ft at 4 seconds.
Isolated thunderstorms.
.SATURDAY...East wind 5 to 10 kt. Seas 4 to 6 ft. Wave Detail:
Northeast 4 ft at 9 seconds, east 3 ft at 8 seconds and east 2 ft
at 4 seconds.
.SUNDAY THROUGH MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft.
Wave Detail: Northeast 5 ft at 10 seconds, east 3 ft at 4 seconds
and east 3 ft at 8 seconds.

$$