870
FZMY50 PGUM 020600
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Thu Oct 2 2025

Marianas Waters out to 40 nautical miles

PMZ150-022100-
400 PM ChST Thu Oct 2 2025

.Synopsis for Marianas Waters...Mainly light winds and combined
seas of 3 to 4 feet are expected through Saturday night. Winds will
become light to gentle Sunday as seas drop to around 3 feet. An
approaching TUTT cell is expected to increase the risk of
thunderstorms across the waters over the next couple of days.

$$

PMZ151>154-022100-
MARIANAS COASTAL WATERS-
400 PM ChST Thu Oct 2 2025

.TONIGHT...East wind 5 kt. Seas 3 to 4 ft. Wave Detail: Northeast 4
ft at 8 seconds and north 2 ft at 9 seconds. Isolated thunderstorms.
.FRIDAY...Southeast wind 5 kt. Seas 3 to 4 ft. Wave Detail: East
4 ft at 8 seconds and north 2 ft at 9 seconds. Isolated
thunderstorms.
.FRIDAY NIGHT...South wind 5 kt. Seas 3 to 4 ft. Wave Detail:
Northeast 4 ft at 8 seconds and north 2 ft at 9 seconds.
.SATURDAY...Southwest wind 5 kt. Seas 3 to 4 ft. Wave Detail:
Northeast 4 ft at 9 seconds and north 2 ft at 9 seconds. Isolated
thunderstorms.
.SATURDAY NIGHT...West wind 5 kt. Seas around 3 ft. Wave Detail:
Northeast 3 ft at 9 seconds and north 2 ft at 9 seconds. Isolated
thunderstorms.
.SUNDAY THROUGH TUESDAY...Variable wind 5 to 10 kt. Seas around 3
ft. Wave Detail: East 3 ft at 8 seconds and south 2 ft at 4 seconds.
A chance of showers with a slight chance of thunderstorms.

$$