807
FPMY50 PGUM 291717
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service TIYAN GU
317 AM ChST Mon Jun 30 2025

GUZ001-301045-
Guam-
317 AM ChST Mon Jun 30 2025

...FLOOD WATCH IN EFFECT THROUGH TUESDAY AFTERNOON...

.TODAY...Cloudy. Scattered showers and isolated thunderstorms in the
morning, then numerous locally heavy showers and isolated
thunderstorms in the afternoon. South winds 15 to 20 mph. Highs
around 85. Chance of showers 60 percent.
.TONIGHT...Mostly cloudy with numerous locally heavy showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Lows around 75.
Chance of showers 60 percent.
.TUESDAY...Mostly cloudy with scattered locally heavy showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Highs around
85. Chance of showers 50 percent.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Scattered showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Lows around
76. Highs around 86. Chance of showers 30 percent.
.WEDNESDAY NIGHT THROUGH SUNDAY...Mostly cloudy with a 30 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the mid 80s.

$$

MPZ001-301045-
Rota-
317 AM ChST Mon Jun 30 2025

...THE FLOOD WATCH HAS BEEN CANCELED...

.TODAY...Mostly cloudy with scattered locally heavy showers and
isolated thunderstorms. South winds 15 to 20 mph. Highs around 85.
Chance of showers 50 percent.
.TONIGHT...Mostly cloudy with numerous locally heavy showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Lows around
79. Chance of showers 60 percent.
.TUESDAY...Mostly cloudy with scattered locally heavy showers and
isolated thunderstorms. Southwest winds 15 to 20 mph. Highs around
84. Chance of showers 50 percent.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Scattered showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Lows around
79. Highs around 85. Chance of showers 30 percent.
.WEDNESDAY NIGHT THROUGH SUNDAY...Mostly cloudy with a 30 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the mid 80s.

$$

MPZ002-003-301045-
Tinian-Saipan-
317 AM ChST Mon Jun 30 2025

.TODAY...Mostly cloudy with scattered showers and isolated
thunderstorms. South winds 10 to 15 mph. Highs around 86. Chance of
showers 50 percent.
.TONIGHT...Cloudy with numerous locally heavy showers and isolated
thunderstorms. South winds 10 to 15 mph. Lows around 76. Chance of
showers 70 percent.
.TUESDAY...Mostly cloudy with numerous locally heavy showers and
isolated thunderstorms. Southwest winds 15 to 20 mph. Highs around
85. Chance of showers 60 percent.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. Scattered showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Lows around 77.
Highs around 86. Chance of showers 30 percent.
.WEDNESDAY NIGHT THROUGH SUNDAY...Mostly cloudy with a 30 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the upper 80s.

$$