854
FZMY50 PGUM 161823
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
423 AM ChST Tue Jun 17 2025

Marianas Waters out to 40 nautical miles

PMZ150-171000-
423 AM ChST Tue Jun 17 2025

.Synopsis for Marianas Waters...Light to gentle winds will build
to moderate by Wednesday night. Combined seas of 3 feet will also
build to between 3 and 5 feet by Thursday. Light to gentle winds
will build to light to moderate by Wednesday night. Scattered
showers and isolated thunderstorms will continue to buildin today
as the lighter winds, daytime heating, nearby TUTT cell, and an
incoming surface trough converge over the region.

$$

PMZ151-152-171000-
Guam Coastal Waters-Rota Coastal Waters-
423 AM ChST Tue Jun 17 2025

.TODAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 2 ft at 4 seconds and east 2 ft at 8 seconds. Scattered
showers with isolated thunderstorms.
.TONIGHT...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 2 ft at 4 seconds and east 2 ft at 8 seconds. Scattered showers
with isolated thunderstorms.
.WEDNESDAY...East wind 10 kt. Seas around 3 ft. Wave Detail: East
3 ft at 8 seconds and east 2 ft at 4 seconds. Isolated
thunderstorms.
.WEDNESDAY NIGHT...East wind 5 to 15 kt. Seas 3 to 4 ft. Wave
Detail: East 3 ft at 4 seconds and east 3 ft at 8 seconds. A
slight chance of thunderstorms.
.THURSDAY THROUGH SATURDAY...East wind 5 to 15 kt. Seas 3 to
5 ft. Wave Detail: East 4 ft at 8 seconds and east 3 ft at
4 seconds.

$$

PMZ153-154-171000-
Tinian Coastal Waters-Saipan Coastal Waters-
423 AM ChST Tue Jun 17 2025

.TODAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds.
.TONIGHT...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds. Scattered
showers.
.WEDNESDAY...East wind 5 to 10 kt. Seas around 3 ft. Wave Detail:
East 3 ft at 8 seconds and east 2 ft at 4 seconds.
.WEDNESDAY NIGHT...East wind 5 to 15 kt. Seas around 4 ft. Wave
Detail: East 3 ft at 8 seconds and east 3 ft at 4 seconds.
.THURSDAY THROUGH SATURDAY...East wind 5 to 15 kt. Seas 3 to
5 ft. Wave Detail: East 4 ft at 8 seconds and east 3 ft at
4 seconds.

$$