024
FZMY50 PGUM 141850
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
450 AM ChST Sat Aug 15 2026

Marianas Waters out to 40 nautical miles

PMZ150-151000-
450 AM ChST Sat Aug 15 2026

.Synopsis for Marianas Waters...
Gentle to moderate southwesterlies prevail across the Marianas
and will persist through the weekend, before decreasing to light
to gentle on Monday. Combined seas of 6 to 8 feet will slowly
subside over the next couple of days, becoming 4 to 6 feet Sunday
night and 3 to 5 feet by the middle of next week. The southern
edge of the monsoon pattern shifts southeastward, bringing a
period of scattered showers and isolated thunderstorms through
Sunday night. Then, a trend towards a wetter pattern is expected
Tuesday onward, depending on the development and track of a
tropical disturbance in eastern Micronesia, well to the southeast.

$$

PMZ151>154-151000-
MARIANAS COASTAL WATERS-
450 AM ChST Sat Aug 15 2026

.TODAY...Southwest wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail:
West 6 ft at 9 seconds, southwest 3 ft at 5 seconds and northeast
2 ft at 10 seconds. Scattered showers with isolated
thunderstorms.
.TONIGHT...Southwest wind 10 to 15 kt with occasional gusts to 25
kt near showers. Seas 5 to 7 ft. Wave Detail: West 6 ft at 9
seconds and southwest 3 ft at 5 seconds. Scattered showers with
isolated thunderstorms.
.SUNDAY...Southwest wind 10 to 15 kt. Seas 5 to 7 ft. Wave
Detail: West 6 ft at 9 seconds and southwest 3 ft at 5 seconds.
Scattered showers with isolated thunderstorms.
.SUNDAY NIGHT...Southwest wind 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: West 5 ft at 8 seconds and southwest 3 ft at 4 seconds.
Scattered showers with isolated thunderstorms.
.MONDAY...Southwest wind 10 kt. Seas 4 to 6 ft. Wave Detail: West
5 ft at 8 seconds and southwest 2 ft at 4 seconds.
.TUESDAY...North wind 10 kt. Seas 3 to 5 ft. Wave Detail: West
5 ft at 9 seconds and north 2 ft at 4 seconds. A chance of
showers with a slight chance of thunderstorms.
.WEDNESDAY...Northeast wind 10 kt. Seas 3 to 5 ft. Wave Detail:
West 5 ft at 9 seconds and north 2 ft at 4 seconds. A chance of
showers with a slight chance of thunderstorms.

$$