Coastal Waters Forecast
Issued by NWS Tiyan, Guam

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021
FZMY50 PGUM 091804
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
404 AM ChST Sun Aug 10 2025

Marianas Waters out to 40 nautical miles

PMZ150-101000-
404 AM ChST Sun Aug 10 2025

.Synopsis for Marianas Waters...Light to gentle winds and combined
seas of 3 to 4 feet are expected through next week. An upper-level
low may produce isolated thunderstorms through tonight.

$$

PMZ151>154-101000-
MARIANAS COASTAL WATERS-
404 AM ChST Sun Aug 10 2025

.TODAY...East wind 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: East
3 ft at 8 seconds and east 3 ft at 4 seconds. Isolated
thunderstorms.
.TONIGHT...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds. Isolated
thunderstorms.
.MONDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East
4 ft at 8 seconds and east 2 ft at 4 seconds.
.MONDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds.
.TUESDAY THROUGH THURSDAY...East wind 5 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds.

$$