102
FZMY50 PGUM 011903
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
503 AM ChST Sun Nov 2 2025

Marianas Waters out to 40 nautical miles

PMZ150-020915-
503 AM ChST Sun Nov 2 2025

.Synopsis for Marianas Waters...
The outer edge of a trade-wind surge has moved into the Marianas,
bringing moderate to fresh winds and combined seas of 6 to 8 feet.
These conditions are expected to persist through the week. The
trade-wind surge could be enhanced by a circulation from Invest
99W, which will likely lead to conditions hazardous to small
craft for portions of the Marianas later in the week. There is a
60 percent chance of Small Craft Advisory in Guam and Rota Waters,
and an 80 percent chance in Tinian and Saipan Waters.

$$

PMZ151>154-020915-
MARIANAS COASTAL WATERS-
503 AM ChST Sun Nov 2 2025

.TODAY...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 6 ft at 9 seconds, east 4 ft at 6 seconds and northwest
2 ft at 12 seconds.
.TONIGHT...East wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
Northeast 6 ft at 9 seconds, east 4 ft at 6 seconds and north 2 ft
at 11 seconds. Scattered showers with isolated thunderstorms.
.MONDAY...East wind 15 to 20 kt with gusts to 30 kt. Seas 7 to
9 ft. Wave Detail: East 6 ft at 8 seconds and north 2 ft at
10 seconds. Scattered showers.
.MONDAY NIGHT...East wind 20 kt with gusts to 30 kt. Seas 7 to
9 ft. Wave Detail: East 6 ft at 8 seconds and north 2 ft at
9 seconds. Scattered showers.
.TUESDAY AND  WEDNESDAY...East wind 10 to 20 kt. Seas 6 to 8 ft.
Wave Detail: East 6 ft at 7 seconds and northwest 2 ft at 8
seconds. A chance of showers with a slight chance of
thunderstorms.
.THURSDAY...South wind 10 to 20 kt. Seas 7 to 9 ft. Wave Detail:
East 7 ft at 9 seconds, south 5 ft at 6 seconds and north 2 ft at
9 seconds. A chance of showers with a slight chance of
thunderstorms.

$$