414
FZMY50 PGUM 151845
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
445 AM ChST Thu Oct 16 2025

Marianas Waters out to 40 nautical miles

PMZ150-160900-
445 AM ChST Thu Oct 16 2025

.Synopsis for Marianas Waters...Moderate east winds have returned
and will continue into next week along with combined seas of 5 to
7 feet. A weak surface trough will keep showers and thunderstorms
in the area today before drier air arrives tonight for the next
couple of days.

$$

PMZ151>154-160900-
MARIANAS COASTAL WATERS-
445 AM ChST Thu Oct 16 2025

.TODAY...East wind 10 to 15 kt with gusts to 25 kt. Seas 4 to
6 ft. Wave Detail: North 4 ft at 12 seconds, east 3 ft at
5 seconds and east 3 ft at 8 seconds. Scattered showers with
isolated thunderstorms.
.TONIGHT...East wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail:
North 4 ft at 12 seconds, east 3 ft at 5 seconds and east 3 ft at
8 seconds. Isolated thunderstorms.
.FRIDAY...East wind 15 kt. Seas 5 to 7 ft. Wave Detail: North
4 ft at 12 seconds, east 3 ft at 5 seconds and northeast 3 ft at
9 seconds.
.FRIDAY NIGHT...East wind 15 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 4 ft at 9 seconds, east 3 ft at 5 seconds and north
3 ft at 12 seconds.
.SATURDAY THROUGH SUNDAY...East wind 15 to 20 kt. Seas 5 to 7 ft.
Wave Detail: East 5 ft at 8 seconds, north 4 ft at 12 seconds and
east 3 ft at 5 seconds. A slight chance of thunderstorms.
.MONDAY...East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
Northeast 5 ft at 8 seconds, north 4 ft at 13 seconds and east
3 ft at 4 seconds. A chance of showers with a slight chance of
thunderstorms.

$$