978
FPMY50 PGUM 200517
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
317 PM ChST Wed Aug 20 2025

GUZ001-MPZ001-202230-
Guam-Rota-
317 PM ChST Wed Aug 20 2025

.TONIGHT...Mostly cloudy. Scattered showers for Guam and isolated
showers for Rota. Isolated thunderstorms. Northeast winds 10 to 15
mph. Lows around 78. Chance of showers 40 percent for Guam, 20
percent for Rota.
.THURSDAY...Mostly cloudy. Scattered showers for Guam and isolated
showers for Rota. Isolated thunderstorms. Northeast winds 10 to 15
mph. Highs around 88. Lows around 78. Chance of showers 30 percent
for Guam, 20 percent for Rota.
.THURSDAY NIGHT AND FRIDAY...Partly sunny with scattered showers and
isolated thunderstorms. East winds 10 to 15 mph. Highs around 87.
Chance of showers 30 percent.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy with isolated showers and
thunderstorms. Light and variable winds becoming east around 10 mph
Saturday afternoon. Lows around 78. Highs around 87. Chance of
showers 20 percent.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy, becoming
mostly cloudy at times. A 20 percent chance of showers and
thunderstorms. Lows in the upper 70s. Highs in the upper 80s.
.MONDAY THROUGH WEDNESDAY...Mostly cloudy with a 40 percent chance
of showers and a slight chance of thunderstorms. Highs in the upper
80s. Lows in the upper 70s.

$$

MPZ002-003-202230-
Tinian-Saipan-
317 PM ChST Wed Aug 20 2025

.TONIGHT...Partly cloudy with isolated showers. Northeast winds
10 to 15 mph. Lows around 78. Chance of showers 20 percent.
.THURSDAY...Partly cloudy with isolated showers. East winds 10 to
15 mph. Highs around 87. Chance of showers 20 percent.
.THURSDAY NIGHT...Partly cloudy with isolated showers and
thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of
showers 20 percent.
.FRIDAY...Partly sunny with scattered showers and isolated
thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of
showers 30 percent.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy with isolated showers and
thunderstorms. East winds 10 to 15 mph. Lows around 78. Highs around
87. Chance of showers 20 percent.
.SATURDAY NIGHT THROUGH MONDAY...Partly cloudy, becoming mostly
cloudy at times. A 20 percent chance of showers. Lows in the upper
70s. Highs in the upper 80s.
.MONDAY NIGHT THROUGH WEDNESDAY...Mostly cloudy with a 40 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the upper 80s.

$$