FZMY50 PGUM 181854
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
454 AM ChST Tue May 19 2026

Marianas Waters out to 40 nautical miles

PMZ150-190815-
454 AM ChST Tue May 19 2026

.Synopsis for Marianas Waters...
Moderate to fresh easterlies will prevail across the region
through the rest of the week, possibly dropping to moderate over 
the weekend. Combined seas are expected to remain between 6 and 8 
feet before tapering down a foot or two in the latter half of this
week.

$$

PMZ151>154-190815-
MARIANAS COASTAL WATERS-
454 AM ChST Tue May 19 2026

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

$$