158
FZMY50 PGUM 230541
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
341 PM ChST Sun Nov 23 2025

Marianas Waters out to 40 nautical miles

PMZ150-232245-
341 PM ChST Sun Nov 23 2025

.Synopsis for Marianas Waters...
Moderate to fresh trade winds will prevail across the region through
the next day or two, gradually diminishing to become gentle to
moderate through the latter half of the week. Combined seas of 7
to 9 feet will also gradually decrease by 1 to 2 feet by the end
of the week, as the elevated trade swell and wind waves become
more relaxed. Although combined seas and winds remain below
criteria hazardous to small craft, sea conditions will remain
choppy for the next few days, especially over eastern coastal waters.

$$

PMZ151>154-232245-
MARIANAS COASTAL WATERS-
341 PM ChST Sun Nov 23 2025

.TONIGHT...East wind 15 to 20 kt with occasional gusts to 25 kt.
Seas 7 to 9 ft. Wave Detail: East 8 ft at 9 seconds and east 4 ft
at 6 seconds.
.MONDAY...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail:
East 8 ft at 9 seconds and east 4 ft at 6 seconds.
.MONDAY NIGHT...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave
Detail: East 8 ft at 9 seconds and east 4 ft at 6 seconds.
.TUESDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East
7 ft at 9 seconds and east 3 ft at 5 seconds.
.TUESDAY NIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
East 7 ft at 9 seconds and east 3 ft at 5 seconds.
.WEDNESDAY...East wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail:
East 7 ft at 9 seconds and east 3 ft at 5 seconds.
.THURSDAY AND FRIDAY...East wind 10 to 15 kt. Seas 5 to 7 ft.
Wave Detail: East 6 ft at 9 seconds and east 3 ft at 4 seconds. A
slight chance of thunderstorms.

$$