669
FZMY50 PGUM 171747
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
347 AM ChST Fri Apr 18 2025

Marianas Waters out to 40 nautical miles

PMZ150-181115-
347 AM ChST Fri Apr 18 2025

.Synopsis for Marianas Waters...Combined seas of 5 to 7 feet are
expected to continue through tonight, then begin to diminish over
the weekend as trade winds and swell gradually subside. Combined
seas are expected to decrease to between 3 and 5 feet early next
week. Moderate to fresh trade winds will decrease into the gentle
to moderate range by Saturday, becoming mostly gentle early next
week.

$$

PMZ151>154-181115-
MARIANAS COASTAL WATERS-
347 AM ChST Fri Apr 18 2025

.TODAY...East wind 15 to 20 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 6 ft at 8 seconds, east 4 ft at 6 seconds and northwest
2 ft at 11 seconds.
.TONIGHT...East wind 15 kt with occasional gusts to 25 kt. Seas 5
to 7 ft. Wave Detail: East 6 ft at 8 seconds, east 3 ft at 5
seconds and northwest 2 ft at 10 seconds.
.SATURDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 6 ft at 8 seconds, east 3 ft at 4 seconds and northeast 2 ft
at 9 seconds.
.SATURDAY NIGHT AND SUNDAY...East wind 10 kt. Seas 4 to 6 ft.
Wave Detail: East 5 ft at 8 seconds, east 2 ft at 4 seconds and
northeast 2 ft at 9 seconds.
.MONDAY THROUGH TUESDAY...East wind 10 kt. Seas 3 to 5 ft. Wave
Detail: East 4 ft at 8 seconds and east 2 ft at 4 seconds.

$$