624
FZMY50 PGUM 130657
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
457 PM ChST Thu Nov 13 2025

Marianas Waters out to 40 nautical miles

PMZ150-132000-
457 PM ChST Thu Nov 13 2025

.Synopsis for Marianas Waters...
Gentle to moderate trade winds will prevail through Friday night,
to then become moderate to fresh for the weekend as trade winds
strengthen. Combined seas of 4 to 5 feet are expected to persist
through Friday night, before slowly increasing thereafter as trade
swell and winds pick up.

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PMZ151>154-132000-
MARIANAS COASTAL WATERS-
457 PM ChST Thu Nov 13 2025

.TONIGHT...East wind 10 kt. Seas 4 to 5 ft. Wave Detail: East 4 ft
at 8 seconds, east 2 ft at 4 seconds and north 2 ft at 11 seconds.
Scattered showers near Guam.
.FRIDAY...East wind 10 kt. Seas 4 to 5 ft. Wave Detail: East 4 ft
at 8 seconds, east 2 ft at 4 seconds and north 2 ft at 11 seconds.
.FRIDAY NIGHT...East wind 10 to 15 kt. Seas 4 to 5 ft. Wave Detail:
East 4 ft at 8 seconds and east 3 ft at 4 seconds.
.SATURDAY...East wind 15 to 20 kt. Seas 5 to 6 ft. Wave Detail:
East 5 ft at 9 seconds and east 4 ft at 5 seconds.
.SATURDAY NIGHT...East wind 15 to 20 kt. Seas 5 to 6 ft. Wave Detail:
East 5 ft at 8 seconds and east 4 ft at 6 seconds. Scattered showers.
.SUNDAY THROUGH TUESDAY...East wind 15 to 20 kt. Seas 5 to 7 ft.
Wave Detail: East 6 ft at 7 seconds and east 4 ft at 6 seconds.

$$