890
FZMY50 PGUM 150600
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Sat Mar 15 2025

Marianas Waters out to 40 nautical miles

PMZ150-152100-
400 PM ChST Sat Mar 15 2025

.Synopsis for Marianas Waters...
The long-period northeast swell moving through the Marianas
continues to subside, with seas now below 10 feet across the
waters. Buoys now show combined seas of 7 to a little over 9 feet
while altimetry shows seas of 7 to 9 feet across the region with
seas above 10 feet to the south and southeast of the waters. Seas
are expected to continue to fall, dropping to between 4 and 6 feet
early next week. Mostly gentle to moderate winds are expected
through the week.

$$

PMZ151>154-152100-
MARIANAS COASTAL WATERS-
400 PM ChST Sat Mar 15 2025

...SMALL CRAFT ADVISORY WILL EXPIRE AT 5 PM CHST THIS AFTERNOON...

.TONIGHT...East wind 15 to 20 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 8 ft at 13 seconds and east 4 ft at 6 seconds.
.SUNDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East 7 ft
at 12 seconds and east 3 ft at 5 seconds.
.SUNDAY NIGHT...East wind 15 kt. Seas 5 to 7 ft. Wave Detail:
East 5 ft at 9 seconds, east 3 ft at 5 seconds and northeast 3 ft
at 12 seconds.
.MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
East 6 ft at 9 seconds, east 3 ft at 4 seconds and north 2 ft at
11 seconds.
.MONDAY NIGHT...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: East 6 ft at 9 seconds, east 3 ft at 4 seconds and north
2 ft at 12 seconds.
.TUESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:
East 5 ft at 8 seconds, east 3 ft at 4 seconds and north 3 ft at
11 seconds.
.WEDNESDAY THROUGH THURSDAY...East wind 10 to 15 kt. Seas 5 to
7 ft. Wave Detail: East 6 ft at 9 seconds, northwest 4 ft at
11 seconds and east 3 ft at 4 seconds.

$$