626
FZMY50 PGUM 230600
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Mon Jun 23 2025

Marianas Waters out to 40 nautical miles

PMZ150-232100-
400 PM ChST Mon Jun 23 2025

.Synopsis for Marianas Waters...Light to gentle east to southeast
trades will prevail through Wednesday. Winds look to become moderate
to fresh and southerly towards the end of the week as a disturbance
develops over the area. Increasing showers and thunderstorms are
expected into the weekend. Combined seas of 3 to 5 feet will continue
through much of the week, building to between 4 and 6 feet by the
weekend.

$$

PMZ151>154-232100-
MARIANAS COASTAL WATERS-
400 PM ChST Mon Jun 23 2025

.TONIGHT...Southeast wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 8 seconds and southeast 2 ft at 4 seconds. Isolated
thunderstorms.
.TUESDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East 3
ft at 8 seconds and east 2 ft at 4 seconds. Isolated thunderstorms.
.TUESDAY NIGHT...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered showers
with isolated thunderstorms.
.WEDNESDAY...East wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: East
3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered showers with
isolated thunderstorms.
.WEDNESDAY NIGHT...Southeast wind 5 to 15 kt. Seas 3 to 5 ft. Wave
Detail: East 4 ft at 8 seconds and southeast 3 ft at 4 seconds.
Scattered showers with isolated thunderstorms.
.THURSDAY...South wind 10 to 15 kt. Gusts to 25 kt with heavier
showers and thunderstorms. Seas 3 to 5 ft. Wave Detail: East 4 ft
at 8 seconds and southeast 3 ft at 4 seconds. Showers likely with a
slight chance of thunderstorms.
.FRIDAY THROUGH SATURDAY...Southwest wind 10 to 20 kt. Gusts to 35
kt with heavier showers and thunderstorms. Seas 4 to 6 ft. Wave
Detail: East 5 ft at 8 seconds and southwest 4 ft at 6 seconds.
Widespread locally heavy showers with a slight chance of
thunderstorms.

$$