318
FPMY50 PGUM 141743
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
343 AM ChST Tue Sep 15 2026

GUZ001-MPZ001-150830-
Guam-Rota-
343 AM ChST Tue Sep 15 2026

.TODAY...Cloudy. Scattered showers in the morning, then numerous
showers in the afternoon. Isolated thunderstorms. Locally heavy
rainfall possible. Northwest winds 10 to 15 mph. Highs around 85.
Chance of showers 70 percent.
.TONIGHT...Mostly cloudy. Numerous showers in the evening, then
scattered showers after midnight. Isolated thunderstorms. Locally
heavy rainfall possible. Northwest winds 10 to 15 mph. Lows around
76. Chance of showers 70 percent.
.WEDNESDAY...Partly cloudy with isolated showers. West winds 10 to
15 mph. Highs around 87. Chance of showers 20 percent.
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. Isolated showers and
thunderstorms. West winds 5 to 15 mph. Lows around 78. Highs around
87. Chance of showers 20 percent.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...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.
.SATURDAY...Partly cloudy with a 20 percent chance of showers and
thunderstorms. Highs in the upper 80s.
.SATURDAY NIGHT THROUGH MONDAY...Mostly cloudy with a chance of
showers and a slight chance of thunderstorms. Lows in the upper 70s.
Highs in the upper 80s. Chance of showers 40 percent.

$$

MPZ002-003-150830-
Tinian-Saipan-
343 AM ChST Tue Sep 15 2026

.TODAY...Mostly cloudy. Scattered showers in the morning, then
numerous showers and isolated thunderstorms in the afternoon.
Northeast winds around 10 mph in the morning becoming light. Highs
around 86. Chance of showers 60 percent.
.TONIGHT...Cloudy with numerous showers and isolated thunderstorms.
Locally heavy rainfall possible. North winds 10 to 15 mph. Lows
around 79. Chance of showers 70 percent.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with isolated showers.
West winds 10 to 15 mph. Highs around 87. Lows around 78. Chance of
showers 20 percent.
.THURSDAY NIGHT THROUGH SATURDAY...Partly cloudy with a 20 percent
chance of showers. Lows in the upper 70s. Highs in the upper 80s.
.SATURDAY NIGHT THROUGH MONDAY...Mostly cloudy with a chance of
showers and a slight chance of thunderstorms. Lows in the upper 70s.
Highs in the upper 80s. Chance of showers 30 percent.

$$