562
FZMY50 PGUM 300739
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
539 PM ChST Sat Aug 30 2025

Marianas Waters out to 40 nautical miles

PMZ150-302000-
539 PM ChST Sat Aug 30 2025

.Synopsis for Marianas Waters...Gentle to fresh southerlies are
expected through Sunday, with occasionally near-gale gusts
possible near heavier showers tonight. Combined seas of 5 to 7
feet are expected to taper down a foot over the weekend, to then
diminish another 2 feet by the middle of next week as trade swell
and wind waves diminish.

$$

PMZ151>154-302000-
MARIANAS COASTAL WATERS-
539 PM ChST Sat Aug 30 2025

.TONIGHT...South wind 10 to 20 kt with occasional gusts to 30 kt
possible near heavier showers. Seas 6 to 7 ft. Wave Detail: East
6 ft at 8 seconds and south 4 ft at 4 seconds. Numerous heavy
showers with isolated thunderstorms.
.SUNDAY...South wind 5 to 15 kt with gusts to 25 kt. Seas around
6 ft. Wave Detail: Southeast 6 ft at 8 seconds and south 3 ft at
4 seconds. Scattered showers with isolated thunderstorms.
.SUNDAY NIGHT...East wind 5 to 10 kt. Seas around 5 ft. Wave
Detail: East 5 ft at 8 seconds and east 2 ft at 4 seconds.
.MONDAY...Northeast wind 10 to 15 kt. Seas around 5 ft. Wave
Detail: East 4 ft at 8 seconds and northeast 3 ft at 4 seconds.
Scattered showers.
.MONDAY NIGHT...Northeast wind 10 to 15 kt. Seas 3 to 5 ft. Wave
Detail: East 4 ft at 8 seconds and northeast 3 ft at 5 seconds.
Scattered showers with isolated thunderstorms.
.TUESDAY THROUGH WEDNESDAY...Southeast wind 10 to 15 kt. Seas
3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and southeast 3 ft
at 4 seconds. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds. A chance of
showers.

$$