566
FZMY50 PGUM 010625
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
425 PM ChST Tue Jul 1 2025

Marianas Waters out to 40 nautical miles

PMZ150-012030-
425 PM ChST Tue Jul 1 2025

.Synopsis for Marianas Waters...A developing monsoon disturbance
to the northeast of the islands will keep a wet southwesterly
pattern across the CNMI. Combined seas of 4 to 5 ft look to
increase a foot or two tonight as a southwest monsoon swell and
winds build into the region. Seas are expected to gradually fall
in the latter half of the week.

$$

PMZ151-012030-
Guam Coastal Waters-
425 PM ChST Tue Jul 1 2025

.TONIGHT...South wind 5 kt. Seas 4 ft. Wave Detail:
Southwest 3 ft at 6 seconds and southeast 3 ft at 8 seconds.
Isolated thunderstorms.
.WEDNESDAY...Southeast wind 5 to 10 kt. Seas 4 to 5 ft. Wave
Detail: Southwest 3 ft at 6 seconds and southeast 3 ft at
8 seconds. Isolated thunderstorms.
.WEDNESDAY NIGHT...Southeast wind 5 kt. Seas 4 to 5 ft. Wave
Detail: Southwest 3 ft at 6 seconds and southeast 3 ft at
8 seconds. Isolated thunderstorms.
.THURSDAY...South wind 5 kt. Seas 3 to 5 ft. Wave Detail: West
3 ft at 6 seconds and east 3 ft at 8 seconds. Isolated
thunderstorms.
.THURSDAY NIGHT...Southeast wind 5 to 10 kt. Seas around 4 ft.
Wave Detail: East 3 ft at 8 seconds and west 2 ft at 6 seconds.
Scattered showers with isolated thunderstorms.
.FRIDAY...South wind 5 kt. Seas around 4 ft. Wave Detail: East
4 ft at 8 seconds and west 2 ft at 6 seconds. Scattered showers
with a slight chance of thunderstorms.
.SATURDAY THROUGH SUNDAY...Southwest wind 5 kt. Seas 3 to 4 ft.
Wave Detail: East 4 ft at 9 seconds and west 2 ft at 6 seconds. A
slight chance of thunderstorms.

$$

PMZ152>154-012030-
Rota Coastal Waters-Tinian Coastal Waters-Saipan Coastal Waters-
425 PM ChST Tue Jul 1 2025

.TONIGHT...Southwest wind 5 to 10 kt. Seas around 4 ft. Wave
Detail: Southwest 3 ft at 5 seconds and east 4 ft at 8 seconds.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...South wind 5 to 10 kt. Seas around 5 ft. Wave
Detail: East 4 ft at 8 seconds and southwest 3 ft at 6 seconds.
Isolated thunderstorms.
.WEDNESDAY NIGHT...South wind 5 to 10 kt. Seas around 5 ft. Wave
Detail: Southeast 4 ft at 8 seconds and southwest 3 ft at
6 seconds. Isolated thunderstorms.
.THURSDAY...South wind 5 to 10 kt. Seas around 5 ft. Wave Detail:
Southwest 3 ft at 5 seconds and east 3 ft at 8 seconds. Isolated
thunderstorms.
.THURSDAY NIGHT...South wind 5 to 10 kt. Seas around 4 ft. Wave
Detail: East 3 ft at 8 seconds and southwest 2 ft at 5 seconds.
Isolated thunderstorms.
.FRIDAY...South wind 5 to 10 kt. Seas around 4 ft. Wave Detail:
East 4 ft at 8 seconds and southwest 2 ft at 5 seconds. Scattered
showers with a slight chance of thunderstorms.
.SATURDAY THROUGH SUNDAY...Southwest wind 5 to 10 kt. Seas 3 to
4 ft. Wave Detail: East 4 ft at 9 seconds and southwest 2 ft at
5 seconds. A slight chance of thunderstorms.

$$