Coastal Waters Forecast
Issued by NWS Tiyan, Guam

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996
FZMY50 PGUM 040644 CCA
CWFGUM

Coastal Waters Forecast for the Mariana Islands...CORRECTED
National Weather Service Tiyan GU
444 PM ChST Sat Oct 4 2025

Marianas Waters out to 40 nautical miles

PMZ150-042045-
444 PM ChST Sat Oct 4 2025

CORRECTED SUNDAY NIGHT TO HAVE SCATTERED SHOWERS

.Synopsis for Marianas Waters...Combined seas of 2 to 4 feet and
light to gentle winds are expected through at least Wednesday. An
approaching TUTT cell will increase the risk of thunderstorms over
the waters over the next couple of days.

$$

PMZ151>154-042045-
MARIANAS COASTAL WATERS-
444 PM ChST Sat Oct 4 2025

.TONIGHT...Southwest wind 5 kt. Seas around 3 ft. Wave Detail:
Northeast 3 ft at 8 seconds. Isolated thunderstorms.
.SUNDAY...Southwest wind 5 kt. Seas around 3 ft. Wave Detail:
Northeast 3 ft at 8 seconds. Isolated thunderstorms.
.SUNDAY NIGHT...Southeast wind 10 kt. Seas around 3 ft. Wave
Detail: East 3 ft at 8 seconds and southeast 2 ft at 4 seconds.
Scattered showers and isolated thunderstorms.
.MONDAY...Southeast wind 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Scattered
showers with isolated thunderstorms.
.MONDAY NIGHT...East wind 5 to 15 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 4 seconds and east 3 ft at 8 seconds.
Scattered showers with isolated thunderstorms.
.TUESDAY...Southeast wind 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: Southeast 3 ft at 4 seconds and east 3 ft at 8 seconds. A
chance of showers with a slight chance of thunderstorms.
.WEDNESDAY THROUGH THURSDAY...Northeast wind 5 to 10 kt. Seas
3 to 4 ft. Wave Detail: East 3 ft at 8 seconds and southeast 2 ft
at 4 seconds. A slight chance of thunderstorms.

$$