732
FZMY50 PGUM 110556
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
356 PM ChST Tue Mar 11 2025

Marianas Waters out to 40 nautical miles

PMZ150-112230-
356 PM ChST Tue Mar 11 2025

.Synopsis for Marianas Waters...As a shear line stalls near or
just north of Saipan, moderate trades will become moderate to
fresh tonight for Tinian and Saipan. A significant northerly
swell has allowed for seas to increase to near-hazardous levels of 7
to 9 feet for Tinian and Saipan and 6 to 8 feet for Guam and
Rota. These seas will likely increase another 1 to 2 feet come
Thursday night with the arrival of another long-period north
swell, which would bring them to hazardous levels for small
craft.

$$

PMZ151-152-112230-
Guam Coastal Waters-Rota Coastal Waters-
356 PM ChST Tue Mar 11 2025

.TONIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 5 ft at 9 seconds, north 5 ft at 10 seconds and east
3 ft at 5 seconds.
.WEDNESDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 5 ft at 9 seconds, north 5 ft at 10 seconds and east
3 ft at 5 seconds.
.WEDNESDAY NIGHT...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 6 ft at 9 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds.
.THURSDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 6 ft at 10 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds.
.THURSDAY NIGHT...East wind 15 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 7 ft at 11 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds.
.FRIDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail: Northeast
7 ft at 11 seconds, north 4 ft at 15 seconds and east 3 ft at
5 seconds.
.SATURDAY THROUGH SUNDAY...East wind 15 kt. Seas 6 to 8 ft. Wave
Detail: Northeast 6 ft at 10 seconds, north 4 ft at 14 seconds
and east 3 ft at 5 seconds.

$$

PMZ153-154-112230-
Tinian Coastal Waters-Saipan Coastal Waters-
356 PM ChST Tue Mar 11 2025

...SEAS WILL BE INCREASINGLY CHOPPY, NEARING HAZARDOUS LEVELS
ESPECIALLY FOR NORTHERN SAIPAN WATERS...

.TONIGHT...Northeast wind 15 to 20 kt. Seas 7 to 9 ft. Wave
Detail: Northeast 6 ft at 9 seconds, north 5 ft at 10 seconds and
northeast 4 ft at 5 seconds. Scattered showers.
.WEDNESDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 6 ft at 9 seconds, north 5 ft at 10 seconds and east 3
ft at 4 seconds.
.WEDNESDAY NIGHT...Northeast wind 15 kt. Seas 7 to 8 ft. Wave
Detail: Northeast 6 ft at 9 seconds, north 4 ft at 11 seconds and
northeast 3 ft at 5 seconds.
.THURSDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail:
Northeast 7 ft at 10 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds.
.THURSDAY NIGHT...East wind 15 kt. Seas 8 to 10 ft. Wave Detail:
Northeast 9 ft at 11 seconds, north 4 ft at 11 seconds and east
3 ft at 5 seconds.
.FRIDAY...East wind 15 kt. Seas 8 to 10 ft. Wave Detail:
Northeast 9 ft at 11 seconds, north 4 ft at 15 seconds and east 3
ft at 5 seconds.
.SATURDAY...East wind 15 kt. Seas 7 to 9 ft. Wave Detail: East
8 ft at 10 seconds, north 4 ft at 14 seconds and east 3 ft at
5 seconds.
.SUNDAY...East wind 15 kt. Seas 6 to 8 ft. Wave Detail: East 7 ft
at 9 seconds, east 3 ft at 5 seconds and northeast 3 ft at
13 seconds.

$$