574
FZMY50 PGUM 190626
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
426 PM ChST Tue Aug 19 2025

Marianas Waters out to 40 nautical miles

PMZ150-192200-
426 PM ChST Tue Aug 19 2025

.Synopsis for Marianas Waters...As a tropical disturbance moves
farther west away from the region, conditions will continue to
improve. Combined seas of 3 to 5 feet and light to gentle winds
are expected through the week and over the weekend.

$$

PMZ151>154-192200-
MARIANAS COASTAL WATERS-
426 PM ChST Tue Aug 19 2025

.TONIGHT...East wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail:
East 5 ft at 8 seconds. Scattered showers over Guam tonight and
for the CNMI starting around midnight. Isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East wind 5 to 10 kt. Seas 3 to
4 ft. Wave Detail: East 4 ft at 8 seconds. Isolated
thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East wind 10 kt. Seas 3 to 4 ft.
Wave Detail: East 3 ft at 8 seconds and east 2 ft at 4 seconds.
Isolated thunderstorms. Scattered showers for Guam and Rota.
.FRIDAY THROUGH SUNDAY...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. A
chance of showers through Saturday. A slight chance of
thunderstorms.

$$