016
FZMY50 PGUM 150646
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
446 PM ChST Mon Dec 15 2025

Marianas Waters out to 40 nautical miles

PMZ150-152000-
446 PM ChST Mon Dec 15 2025

.Synopsis for Marianas Waters...
Moderate to fresh trade winds will prevail across the region the
rest of today. Combined seas of 6 to 8 feet are likely to persist
through Tuesday night, before increasing briefly around midweek
and then increase once again by the weekend as a significant
northerly pulse and strengthening trade swell make their way
across the region.

$$

PMZ151>154-152000-
MARIANAS COASTAL WATERS-
446 PM ChST Mon Dec 15 2025

...SMALL CRAFT ADVISORY IS ALLOWED TO EXPIRE LATE THIS
AFTERNOON...

.TONIGHT...Northeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 7 ft at 9 seconds, northeast 3 ft at 5 seconds and
north 3 ft at 11 seconds.
.TUESDAY...Northeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 7 ft at 9 seconds, northeast 4 ft at 6 seconds and
north 3 ft at 11 seconds.
.TUESDAY NIGHT...Northeast wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 6 ft at 9 seconds, northeast 4 ft at 6 seconds and
north 3 ft at 11 seconds. Scattered showers.
.WEDNESDAY...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail:
East 6 ft at 9 seconds, east 4 ft at 6 seconds and north 4 ft at
11 seconds. Scattered showers.
.WEDNESDAY NIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 6 ft at 9 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds. Scattered showers.
.THURSDAY THROUGH FRIDAY...East wind 15 to 20 kt. Seas 6 to 8 ft.
Wave Detail: East 6 ft at 9 seconds, east 4 ft at 6 seconds and
north 3 ft at 11 seconds.
.SATURDAY...East wind 15 to 25 kt. Seas 7 to 10 ft. Wave Detail:
Northeast 9 ft at 9 seconds, east 4 ft at 6 seconds and north
2 ft at 9 seconds. A chance of showers.

$$