316
FZMY50 PGUM 280545
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
345 PM ChST Sat Jun 28 2025

Marianas Waters out to 40 nautical miles

PMZ150-282000-
345 PM ChST Sat Jun 28 2025

.Synopsis for Marianas Waters...A developing monsoon disturbance
to the north of the region will keep a wet southwesterly pattern
across the Marianas. Combined seas of 4 to 5 feet look to increase
a foot or two by Tuesday, as a southwest monsoon swell and winds
build into the region.

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PMZ151>154-282000-
MARIANAS COASTAL WATERS-
345 PM ChST Sat Jun 28 2025

.TONIGHT...Southwest wind 5 to 10 kt. Seas around 4 ft. Wave
Detail: East 4 ft at 8 seconds and southwest 2 ft at 4 seconds.
Scattered showers with isolated thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Southwest wind 5 to 15 kt with gusts
to 25 kt near heavier showers. Seas 3 to 4 ft. Wave Detail: East 4
ft at 8 seconds and southwest 3 ft at 4 seconds. Numerous
showers, heavy at times, and isolated thunderstorms.
.MONDAY AND MONDAY NIGHT...Southwest wind 10 to 15 kt. Seas
around 5 ft. Wave Detail: Southwest 3 ft at 4 seconds, southwest 3
ft at 8 seconds and east 3 ft at 8 seconds. Scattered showers
with isolated thunderstorms.
.TUESDAY...Southwest wind 10 to 15 kt. Seas around 5 ft. Wave
Detail: West 4 ft at 8 seconds, east 3 ft at 8 seconds and
southwest 3 ft at 4 seconds. A chance of showers with a slight
chance of thunderstorms.
.WEDNESDAY THROUGH THURSDAY...South wind 10 kt. Seas 4 to 5 ft.
Wave Detail: East 3 ft at 7 seconds, west 3 ft at 8 seconds and
south 2 ft at 4 seconds. A chance of showers.

$$