835
FPMY50 PGUM 171742
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
342 AM ChST Fri Sep 18 2026

GUZ001-MPZ001-180945-
Guam-Rota-
342 AM ChST Fri Sep 18 2026

.TODAY...Partly sunny with scattered showers and isolated
thunderstorms. West winds 10 to 15 mph. Highs around 87. Chance of
showers 40 percent.
.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. West winds 10 to 15 mph. Lows around 77. Chance of
showers 40 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly cloudy. Scattered showers and
isolated thunderstorms. Southwest winds 10 to 15 mph. Highs around
87. Lows around 77. Chance of showers 40 percent.
.SUNDAY...Partly sunny with scattered showers and isolated
thunderstorms. Light and variable winds. Highs around 87. Chance of
showers 30 percent.
.SUNDAY NIGHT...Mostly cloudy with a 40 percent chance of showers
and a slight chance of thunderstorms. Lows in the upper 70s.
.MONDAY...Mostly cloudy with a 50 percent chance of showers and a
slight chance of thunderstorms. 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.
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A 30 percent chance
of showers. Lows in the upper 70s. Highs in the upper 80s.

$$

MPZ002-003-180945-
Tinian-Saipan-
342 AM ChST Fri Sep 18 2026

.TODAY...Partly sunny with scattered showers. Southwest winds 10 to
15 mph. Highs around 88. Chance of showers 30 percent.
.TONIGHT...Partly cloudy with isolated showers. Southwest winds
10 to 15 mph. Lows around 78. Chance of showers 20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly cloudy with scattered showers
and isolated thunderstorms. Southwest winds 5 to 15 mph. Highs
around 87. Lows around 77. Chance of showers 30 percent.
.SUNDAY...Partly sunny with scattered showers and isolated
thunderstorms. South winds 5 to 10 mph. Highs around 88. Chance of
showers 30 percent.
.SUNDAY NIGHT THROUGH TUESDAY...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.
.TUESDAY NIGHT THROUGH THURSDAY...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.

$$