FZMY50 PGUM 091853
CWFGUM

Coastal Waters Forecast for the Mariana Islands
National Weather Service Tiyan GU
453 AM ChST Fri Jul 10 2026

Marianas Waters out to 40 nautical miles

PMZ150-100845-
453 AM ChST Fri Jul 10 2026

.Synopsis for Marianas Waters...
Significant west to southwest swells continue to emanate from 
Typhoon Bavi (09W) and its trailing monsoon pattern, maintaining 
seas hazardous to small craft. Altimetry and Tanapag buoy data 
indicate combined seas remaining at around 9 to 10 feet over 
western coastal waters of the Marianas as seas take longer to 
relax below hazardous levels than previously expected. So the 
Small Craft Advisory has been extended through this afternoon, 
after which seas may fall below hazardous levels of 10 feet.

$$

PMZ151>154-100845-
MARIANAS COASTAL WATERS-
453 AM ChST Fri Jul 10 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...

.TODAY...Northeast wind 5 to 10 kt. Seas 7 to 10 ft. Wave Detail:
West 8 ft at 11 seconds, northeast 2 ft at 4 seconds and east 2 ft
at 9 seconds. Isolated thunderstorms.
.TONIGHT...Northeast wind 10 to 15 kt. Seas 6 to 8 ft. Wave
Detail: West 7 ft at 11 seconds, northeast 2 ft at 4 seconds and
east 2 ft at 9 seconds.
.SATURDAY...Northeast wind 10 to 15 kt. Seas 6 to 8 ft. Wave
Detail: West 6 ft at 11 seconds, northeast 3 ft at 4 seconds and
east 3 ft at 9 seconds. Scattered showers with isolated
thunderstorms.
.SATURDAY NIGHT...East wind 10 to 15 kt. Seas 6 to 8 ft. Wave
Detail: West 5 ft at 10 seconds, east 4 ft at 10 seconds and east
3 ft at 5 seconds. Scattered showers with isolated thunderstorms.
.SUNDAY...Southeast wind 10 to 20 kt. Seas 6 to 8 ft. Wave
Detail: Northwest 6 ft at 10 seconds, east 4 ft at 9 seconds and
southeast 3 ft at 4 seconds. Scattered showers with a slight
chance of thunderstorms. 
.MONDAY...South wind 10 to 20 kt. Seas 5 to 7 ft. Wave Detail:
North 4 ft at 9 seconds, east 4 ft at 9 seconds and southeast
3 ft at 4 seconds. A chance of showers with a slight chance of
thunderstorms. 
.TUESDAY...South wind 15 to 20 kt. Seas 6 to 8 ft. Wave Detail:
Southwest 7 ft at 8 seconds and south 4 ft at 6 seconds. A chance
of showers with a slight chance of thunderstorms.  

$$