964
FZMY50 PGUM 100616
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
416 PM ChST Fri Oct 10 2025

Marianas Waters out to 40 nautical miles

PMZ150-102200-
416 PM ChST Fri Oct 10 2025

.Synopsis for Marianas Waters...Winds are expected to be light to
gentle for the next day or so, and will build to moderate by
Sunday. Combined seas of 3 to 5 feet will persist through
Saturday, to then build to 5 to 7 feet thereafter, as a long-
period north swell moves through the region from the distant
Typhoon Halong. Seas may start to fall around the middle of next
week.

$$

PMZ151>154-102200-
MARIANAS COASTAL WATERS-
416 PM ChST Fri Oct 10 2025

.TONIGHT...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail:
Northeast 4 ft at 8 seconds and east 2 ft at 4 seconds. Isolated
thunderstorms.
.SATURDAY...East wind 5 to 10 kt. Seas around 3 to 5 ft. Wave
Detail: Northeast 5 ft at 8 seconds, east 3 ft at 8 seconds and
east 2 ft at 4 seconds. Isolated thunderstorms.
.SATURDAY NIGHT...Northeast wind 5 to 10 kt. Seas 4 to 6 ft. Wave
Detail: North 5 ft at 11 seconds, east 3 ft at 8 seconds and
northeast 2 ft at 4 seconds.
.SUNDAY...Northeast wind 5 to 15 kt. Seas 4 to 6 ft. Wave Detail:
North 4 ft at 12 seconds, east 3 ft at 8 seconds and northeast
3 ft at 4 seconds.
.SUNDAY NIGHT...East wind 10 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 5 ft at 12 seconds, east 3 ft at 8 seconds and east
2 ft at 4 seconds.
.MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 5 ft at 11 seconds, east 3 ft at 4 seconds and east
3 ft at 8 seconds.
.TUESDAY AND WEDNESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft.
Wave Detail: Northeast 5 ft at 9 seconds, east 3 ft at 5 seconds
and east 2 ft at 8 seconds. A chance of showers with a slight
chance of thunderstorms.

$$