777
FZMY50 PGUM 170714
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
514 PM ChST Fri Oct 17 2025

Marianas Waters out to 40 nautical miles

PMZ150-172000-
514 PM ChST Fri Oct 17 2025

.Synopsis for Marianas Waters...
Moderate to fresh trade winds are expected through Saturday,
tapering down thereafter as the pressure gradient between the
tropics and mid-latitudes decreases. Combined seas of 6 to 8 feet
will stay elevated and choppy through at least the weekend, as
northerly swells and trade swell continue to mix in, before
tapering down by the middle of next week.

$$

PMZ151>154-172000-
MARIANAS COASTAL WATERS-
514 PM ChST Fri Oct 17 2025

.TONIGHT...East wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail:
East 6 ft at 9 seconds, north 4 ft at 11 seconds and east 3 ft at
5 seconds. Scattered showers.
.SATURDAY...East wind 15 to 20 kt with occasional gusts to 25 kt.
Seas 6 to 8 ft. Wave Detail: East 6 ft at 9 seconds, east 4 ft at
5 seconds and north 4 ft at 12 seconds. Scattered showers.
.SATURDAY NIGHT...East wind 10 to 20 kt. Seas 6 to 8 ft. Wave
Detail: East 6 ft at 9 seconds, east 4 ft at 6 seconds and north 4
ft at 11 seconds.
.SUNDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 6 ft at 8 seconds, east 3 ft at 5 seconds and north 3 ft at
10 seconds.
.SUNDAY NIGHT...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: East 5 ft at 8 seconds, east 3 ft at 5 seconds and north
2 ft at 10 seconds. Scattered showers.
.MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 8 seconds, north 4 ft at 13 seconds and east 3 ft at
4 seconds. A chance of showers.
.TUESDAY...Southeast wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: East 5 ft at 9 seconds, north 4 ft at 13 seconds and
southeast 3 ft at 4 seconds. A chance of showers.
.WEDNESDAY...Southeast wind 10 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 9 seconds, north 3 ft at 12 seconds and southeast
2 ft at 4 seconds. A chance of showers.

$$