867
FZMY50 PGUM 061812
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
412 AM ChST Thu Aug 7 2025

Marianas Waters out to 40 nautical miles

PMZ150-071000-
412 AM ChST Thu Aug 7 2025

.Synopsis for Marianas Waters...Light to gentle southeast to
south winds are expected to persist for the next day or two, with
more variable winds near Tinian and Saipan as a col and then a
weak circulation pass nearby. By the end of the week, winds should
increase to gentle to moderate out of the east to southeast.
Combined seas of around 3 feet will continue into the weekend with
a dominant trade swell and light wind waves. A very slight
increase in trade swell may bump seas up around a foot by early
next week.

$$

PMZ151-152-071000-
Guam Coastal Waters-Rota Coastal Waters-
412 AM ChST Thu Aug 7 2025

.TODAY...Southeast wind 5 kt. Seas around 3 ft. Wave Detail: East
3 ft at 8 seconds. Scattered showers with isolated thunderstorms.
.TONIGHT...East wind 5 kt. Seas around 3 ft. Wave Detail: East
3 ft at 8 seconds. Isolated thunderstorms.
.FRIDAY...East to southeast wind 5 to 10 kt. Seas around 3 ft.
Wave Detail: East 3 ft at 8 seconds and east 2 ft at 4 seconds.
.FRIDAY NIGHT...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.
.SATURDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds.
.SUNDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East
3 ft at 8 seconds and east 2 ft at 4 seconds. A chance of showers
with a slight chance of thunderstorms.
.MONDAY...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 4 ft at 8 seconds and southeast 2 ft at 4 seconds. A slight
chance of thunderstorms.

$$

PMZ153-154-071000-
Tinian Coastal Waters-Saipan Coastal Waters-
412 AM ChST Thu Aug 7 2025

.TODAY...Variable wind 5 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds. Scattered showers with isolated
thunderstorms.
.TONIGHT...Variable wind 5 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds. Scattered showers with isolated
thunderstorms.
.FRIDAY...East to southeast wind 5 kt. Seas around 3 ft. Wave
Detail: East 3 ft at 8 seconds.
.FRIDAY NIGHT AND SATURDAY...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.
.SUNDAY THROUGH MONDAY...East to southeast wind 5 to 10 kt. Seas
3 to 4 ft. Wave Detail: East 4 ft at 8 seconds and east 2 ft at 4
seconds. A slight chance of thunderstorms.

$$