FPMY50 PGUM 230607
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
407 PM ChST Sun Aug 23 2026

GUZ001-MPZ001>003-232115-
Guam-Rota-Tinian-Saipan-
407 PM ChST Sun Aug 23 2026

...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST MONDAY ALONG WEST- 
FACING REEFS... 
...HIGH RIP CURRENT RISK IN EFFECT THROUGH MONDAY AFTERNOON ALONG 
WEST-FACING REEFS...

.TONIGHT...Cloudy with scattered showers becoming numerous heavy 
showers and isolated thunderstorms before midnight. Southwest winds 
10 to 15 mph with gusts to 25 mph near heavier showers. Lows around 
77. Chance of showers 60 percent.
.MONDAY...Cloudy with numerous showers and isolated thunderstorms. 
South winds 10 to 15 mph with gusts to 25 mph near heavier showers. 
Highs around 85. Chance of showers 60 percent. 
.MONDAY NIGHT...Mostly cloudy with scattered heavy showers and 
isolated thunderstorms. Southwest winds 10 to 15 mph with gusts to 
25 mph near heavier showers. Lows around 78. Chance of showers 50 
percent.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with scattered locally
heavy showers and isolated thunderstorms. Southwest winds 5 to 10 
mph. Highs around 87. Lows around 78. Chance of showers 40 percent. 
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A 40 percent chance 
of showers and a slight chance of thunderstorms. Lows in the upper 
70s. Highs in the mid 80s.
.THURSDAY NIGHT AND FRIDAY...Cloudy with showers likely and a slight
chance of thunderstorms. Lows in the upper 70s. Highs in the mid 
80s. Chance of showers 60 percent.
.FRIDAY NIGHT THROUGH SUNDAY...Mostly cloudy with a chance of 
showers and a slight chance of thunderstorms. Lows in the upper 70s.
Highs in the mid 80s. Chance of showers 50 percent. 

$$