Coastal Waters Forecast
Issued by NWS Tiyan, Guam

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738
FZMY50 PGUM 191800
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Sun Apr 20 2025

Marianas Waters out to 40 nautical miles

PMZ150-200900-
400 AM ChST Sun Apr 20 2025

.Synopsis for Marianas Waters...Combined seas of 4 to 6 feet will
gradually diminish, reaching 2 to 4 feet this Tuesday as trade
winds and swell subside. Light to gentle trades will continue
through Thursday.

$$

PMZ151>154-200900-
MARIANAS COASTAL WATERS-
400 AM ChST Sun Apr 20 2025

.TODAY...East wind 10 kt. Seas 4 to 5 ft. Wave Detail: East 4 ft
at 8 seconds, east 2 ft at 4 seconds and northeast 2 ft at
9 seconds.
.TONIGHT...East wind 10 kt. Seas 3 to 5 ft. Wave Detail:
Northeast 4 ft at 9 seconds and east 2 ft at 4 seconds. Scattered
showers.
.MONDAY...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail:
Northeast 4 ft at 9 seconds and east 2 ft at 4 seconds.
.MONDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 5 ft. Wave
Detail: East 3 ft at 8 seconds, east 2 ft at 4 seconds and north
2 ft at 9 seconds.
.TUESDAY THROUGH THURSDAY...East wind 10 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 8 seconds and east 2 ft at 4 seconds.

$$