538
FZMY50 PGUM 250611
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
411 PM ChST Tue Nov 25 2025

Marianas Waters out to 40 nautical miles

PMZ150-252200-
411 PM ChST Tue Nov 25 2025

.Synopsis for Marianas Waters...
Moderate to fresh trade winds will prevail across the region
through Wednesday, becoming gentle to moderate by the weekend.
Combined seas of 6 to 8 feet will gradually decrease by 1 to 2
feet toward the end of the week, as the elevated trade swell and
wind waves continue to become more relaxed. Although sea
conditions remain below levels hazardous to small craft, seas will
remain choppy for the next few days, especially over eastern
coastal waters.

$$

PMZ151>154-252200-
MARIANAS COASTAL WATERS-
411 PM ChST Tue Nov 25 2025

.TONIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 7 ft at 9 seconds and east 4 ft at 6 seconds.
.WEDNESDAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
East 7 ft at 9 seconds and east 4 ft at 6 seconds. Scattered
showers.
.WEDNESDAY 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. Scattered
showers.
.THURSDAY...East wind 15 kt. Seas 6 to 7 ft. Wave Detail: East 6
ft at 9 seconds and east 3 ft at 5 seconds. Scattered showers.
.THURSDAY NIGHT...East wind 15 kt. Seas 5 to 7 ft. Wave Detail:
East 6 ft at 8 seconds and east 3 ft at 5 seconds.
.FRIDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: East 6 ft
at 8 seconds and east 3 ft at 5 seconds.
.SATURDAY AND SUNDAY...East wind 10 to 15 kt. Seas 5 to 7 ft.
Wave Detail: Northeast 6 ft at 9 seconds and east 3 ft at 4
seconds. A chance of showers with a slight chance of
thunderstorms.

$$