Coastal Waters Forecast
Issued by NWS Tiyan, Guam

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064
FZMY50 PGUM 011852
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
452 AM ChST Tue Sep 2 2025

Marianas Waters out to 40 nautical miles

PMZ150-021000-
452 AM ChST Tue Sep 2 2025

.Synopsis for Marianas Waters...Expect light to moderate winds
over the next few days. Then near the weekend winds are
anticipated to fall back to light to gentle. Combined seas of 3
to 5 feet are expected to gradually fall over the week to near 3
feet by the weekend.

$$

PMZ151>154-021000-
MARIANAS COASTAL WATERS-
452 AM ChST Tue Sep 2 2025

.TODAY...East wind 10 to 15 kt with occasional gusts to 25 kt.
Seas 3 to 5 ft. Wave Detail: East 3 ft at 4 seconds and east 3 ft
at 8 seconds. Scattered showers with isolated thunderstorms.
.TONIGHT...Southeast wind 5 to 15 kt with occasional gusts to 25
kt. Seas 3 to 5 ft. Wave Detail: East 4 ft at 8 seconds and
southeast 3 ft at 4 seconds. Scattered showers with isolated
thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...Southeast wind 5 to 10 kt. Seas
around 4 ft. Wave Detail: East 4 ft at 8 seconds and southeast 2
ft at 4 seconds. Isolated thunderstorms.
.THURSDAY THROUGH SATURDAY...East wind 5 to 10 kt. Seas 3 to
4 ft. Wave Detail: Northeast 4 ft at 8 seconds and east 2 ft at
4 seconds. A slight chance of thunderstorms.

$$