938
FZMY50 PGUM 101857
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
457 AM ChST Sat Oct 11 2025

Marianas Waters out to 40 nautical miles

PMZ150-110830-
457 AM ChST Sat Oct 11 2025

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

$$

PMZ151>154-110830-
MARIANAS COASTAL WATERS-
457 AM ChST Sat Oct 11 2025

.TODAY...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail:
Northeast 4 ft at 8 seconds and east 3 ft at 8 seconds.
.TONIGHT...Northeast wind 5 to 10 kt. Seas 4 to 5 ft. Wave
Detail: North 4 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:
East 3 ft at 8 seconds, north 3 ft at 12 seconds and northeast 2
ft at 4 seconds.
.SUNDAY NIGHT...East wind 10 kt. Seas 4 to 6 ft. Wave Detail:
East 3 ft at 8 seconds, northeast 3 ft at 12 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 3 to 5 ft.
Wave Detail: Northeast 5 ft at 9 seconds and east 3 ft at 5
seconds. A chance of showers. A slight chance of thunderstorms.

$$