238
FZMY50 PGUM 141802
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
402 AM ChST Tue Jul 15 2025

Marianas Waters out to 40 nautical miles

PMZ150-151215-
402 AM ChST Tue Jul 15 2025

.Synopsis for Marianas Waters...Gentle to moderate southeast to
east winds will continue across the region for most of the week,
with seas of 4 to 6 feet building to 5 to 7 feet by Thursday as
the west-southwest swell builds. A TUTT cell west of Wake Island
and a monsoon trough in western Micronesia are slowly moving
towards the Marianas and will be increasing the potential for
showers and thunderstorms over the next few days.

$$

PMZ151>154-151215-
MARIANAS COASTAL WATERS-
402 AM ChST Tue Jul 15 2025

.TODAY...Southeast wind 10 to 15 kt. Seas 4 to 5 ft. Wave
Detail: East 4 ft at 9 seconds, southeast 3 ft at 4 seconds and
west 2 ft at 7 seconds.
.TONIGHT...Southeast wind 10 to 15 kt. Seas 4 to 5 ft. Wave
Detail: East 4 ft at 9 seconds, southeast 3 ft at 4 seconds and
west 2 ft at 7 seconds. Scattered showers.
.WEDNESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:
East 4 ft at 9 seconds, east 3 ft at 5 seconds and west 2 ft at 7
seconds. Scattered showers with isolated thunderstorms.
.WEDNESDAY NIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: East 4 ft at 9 seconds, west 3 ft at 8 seconds and east 3
ft at 4 seconds. Scattered showers with isolated thunderstorms.
.THURSDAY THROUGH FRIDAY...East wind 10 to 15 kt. Seas 5 to 7 ft.
Wave Detail: West 4 ft at 8 seconds, east 4 ft at 8 seconds and
east 3 ft at 4 seconds. A chance of showers with a slight chance
of thunderstorms.
.SATURDAY...East wind 10 kt. Seas 4 to 6 ft. Wave Detail: West 4
ft at 9 seconds, east 3 ft at 8 seconds and east 2 ft at 4
seconds. A chance of showers with a slight chance of thunderstorms.

$$