259
FPMY50 PGUM 190553
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
353 PM ChST Tue Aug 19 2025

GUZ001-MPZ001>003-192100-
Guam-Rota-Tinian-Saipan-
353 PM ChST Tue Aug 19 2025

.TONIGHT...Mostly cloudy. Scattered showers for Guam. For the CNMI,
isolated showers increasing to scattered around midnight. Isolated
thunderstorms. Light and variable winds becoming east around 10 mph
after midnight. Lows around 78. Chance of showers 40 percent.
.WEDNESDAY...Partly sunny with isolated showers and thunderstorms.
East winds 10 to 15 mph. Highs around 88. Chance of showers
20 percent.
.WEDNESDAY NIGHT...Partly cloudy with isolated showers and
thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of
showers 20 percent.
.THURSDAY THROUGH FRIDAY...Mostly cloudy. Scattered showers for Guam
and Rota; isolated showers for Tinian and Saipan. Isolated
thunderstorms. East winds 10 to 15 mph. Highs around 88. Lows around
78. Chance of showers 30 percent for Guam and Rota, 20 percent for
Tinian and Saipan.
.FRIDAY NIGHT AND SATURDAY...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 NIGHT AND SUNDAY...Mostly cloudy. A 20 percent chance of
showers and thunderstorms. Lows in the upper 70s. Highs in the upper
80s.
.SUNDAY NIGHT...Mostly cloudy with a 30 percent chance of showers.
Lows in the upper 70s.
.MONDAY THROUGH TUESDAY...Mostly cloudy with a 30 percent chance of
showers and a slight chance of thunderstorms. Highs in the upper 80s.
Lows in the upper 70s.

$$