FZMY50 PGUM 050717

CWFGUM



Coastal Waters Forecast for the Mariana Islands

National Weather Service Tiyan GU

517 PM ChST Thu Nov 5 2026



Marianas Waters out to 40 nautical miles



PMZ150-052215-

517 PM ChST Thu Nov 5 2026



.Synopsis for Marianas Waters...

Light to moderate trade winds are expected before becoming light 

Friday night and then returning Sunday. Combined seas of 6 to 7 

ft may decrease slightly Saturday. Swells consist of an easterly 

trade wind swell and a small northwest swell. Invest 99W passing 

through the far northern CNMI may bring scattered showers and 

isolated thunderstorms to the coastal waters of Tinian and Saipan 

around Friday night.



$$



PMZ151-152-052215-

Guam Coastal Waters-Rota Coastal Waters-

517 PM ChST Thu Nov 5 2026



.TONIGHT...Northeast wind 10 to 15 kt. Seas 6 to 7 ft. Wave

Detail: East 6 ft at 11 seconds, northeast 3 ft at 4 seconds and

northwest 2 ft at 9 seconds. 

.FRIDAY...Northeast wind 10 to 15 kt. Seas 6 to 7 ft. Wave

Detail: East 6 ft at 11 seconds, northeast 3 ft at 4 seconds and

northwest 2 ft at 9 seconds. 

.FRIDAY NIGHT...Northeast wind 5 kt. Seas 6 to 7 ft. Wave Detail:

East 6 ft at 11 seconds and north 2 ft at 14 seconds.

.SATURDAY...Southeast wind 5 kt. Seas 5 to 6 ft. Wave Detail:

East 5 ft at 11 seconds and north 2 ft at 13 seconds.

.SATURDAY NIGHT...East wind 5 to 10 kt. Seas 4 to 5 ft. Wave

Detail: East 4 ft at 10 seconds, east 2 ft at 4 seconds and north

2 ft at 12 seconds. 

.SUNDAY THROUGH TUESDAY...East wind 10 to 15 kt. Seas 4 to 6 ft.

Wave Detail: Northeast 5 ft at 9 seconds and northeast 3 ft at

4 seconds.  



$$



PMZ153-154-052215-

Tinian Coastal Waters-Saipan Coastal Waters-

517 PM ChST Thu Nov 5 2026



.TONIGHT...Northeast wind 10 to 15 kt. Seas 6 to 7 ft. Wave

Detail: East 6 ft at 11 seconds, northeast 3 ft at 4 seconds and

northwest 2 ft at 9 seconds. 

.FRIDAY...Northeast wind 10 kt. Seas 6 to 7 ft. Wave Detail: East

6 ft at 11 seconds, northeast 2 ft at 4 seconds and northwest

2 ft at 9 seconds. 

.FRIDAY NIGHT...North wind 10 kt. Seas 6 to 7 ft. Wave Detail:

East 6 ft at 11 seconds and north 2 ft at 14 seconds. Scattered

showers with isolated thunderstorms. 

.SATURDAY...South wind 5 to 10 kt. Seas 5 to 6 ft. Wave Detail:

East 5 ft at 11 seconds and north 2 ft at 13 seconds.

.SATURDAY NIGHT...Southeast wind 5 to 10 kt. Seas 4 to 5 ft. Wave

Detail: East 4 ft at 10 seconds, southeast 2 ft at 4 seconds and

north 2 ft at 12 seconds. 

.SUNDAY THROUGH TUESDAY...East wind 10 to 15 kt. Seas 5 to 7 ft.

Wave Detail: Northeast 6 ft at 9 seconds and east 3 ft at

4 seconds.  



$$