004
FZMY50 PGUM 160746 CCA
CWFGUM

Coastal Waters Forecast for the Mariana Islands...CORRECTED
National Weather Service Tiyan GU
546 PM ChST Thu Oct 16 2025

Marianas Waters out to 40 nautical miles

PMZ150-162115-
546 PM ChST Thu Oct 16 2025

Corrected formatting error.

.Synopsis for Marianas Waters...
Moderate east winds will continue into next week, increasing briefly
to moderate to fresh Saturday night as a trough passes near or just
south of the Marianas. Seas have briefly dropped to 4 to 6 feet, but
will rebuild to 5 to 7 feet as the east swell builds about a foot.
Lingering scattered showers and isolated thunderstorm are expected to
decrease overnight as drier air continues to move in. Showers and
thunderstorm chances will increase again this weekend as a couple of
weak surface troughs pass near the Marianas.

$$

PMZ151>154-162115-
MARIANAS COASTAL WATERS-
546 PM ChST Thu Oct 16 2025

.TONIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:
North 4 ft at 12 seconds, east 3 ft at 4 seconds and east 3 ft at
8 seconds. Scattered showers and isolated thunderstorms this
evening. Isolated thunderstorms.
.FRIDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: North
4 ft at 12 seconds, east 3 ft at 5 seconds and east 3 ft at
9 seconds.
.FRIDAY NIGHT...East wind 15 kt. Seas 5 to 7 ft. Wave Detail:
East 4 ft at 9 seconds, north 4 ft at 11 seconds and east 3 ft at
5 seconds.
.SATURDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: East
5 ft at 9 seconds, east 3 ft at 5 seconds and north 3 ft at
12 seconds. Isolated thunderstorms.
.SATURDAY NIGHT...East wind 15 to 20 kt. Seas 5 to 7 ft. Wave
Detail: East 5 ft at 9 seconds, east 4 ft at 5 seconds and north
3 ft at 11 seconds. Scattered showers with isolated thunderstorms.
.SUNDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 8 seconds, east 3 ft at 5 seconds and north 3 ft at
10 seconds. A slight chance of thunderstorms.
.MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 8 seconds, north 4 ft at 13 seconds and east 3 ft at
4 seconds. A chance of showers with a slight chance of
thunderstorms.
.TUESDAY...Southeast wind 10 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 9 seconds, north 4 ft at 13 seconds and southeast
2 ft at 4 seconds. A chance of showers with a slight chance of
thunderstorms.

$$