872
FPMY50 PGUM 200508
ZFPGUM
ZONE FORECAST FOR GUAM AND THE NORTHERN MARIANAS
NATIONAL WEATHER SERVICE TIYAN GU
308 PM CHST THU AUG 20 2026
GUZ001-MPZ001-202145-
GUAM-ROTA-
308 PM CHST THU AUG 20 2026
TONIGHT
PARTLY CLOUDY WITH ISOLATED SHOWERS. NORTHEAST WINDS
5 TO 10 MPH IN THE EVENING BECOMING LIGHT. LOWS AROUND 78. CHANCE OF
SHOWERS 20 PERCENT.
FRIDAY
PARTLY CLOUDY. ISOLATED LIGHT SHOWERS IN THE MORNING, THEN
SCATTERED, LOCALLY HEAVY ISLAND EFFECT SHOWERS AND ISOLATED
THUNDERSTORMS IN THE AFTERNOON FOR GUAM. LIGHT AND VARIABLE WINDS.
HIGHS AROUND 86. CHANCE OF SHOWERS 50 PERCENT.
FRIDAY NIGHT
PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LIGHT AND VARIABLE WINDS BECOMING SOUTHWEST AROUND
10 MPH AFTER MIDNIGHT. LOWS AROUND 77. CHANCE OF SHOWERS 20 PERCENT.
SATURDAY
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. SOUTHWEST WINDS 15 TO 20 MPH. HIGHS AROUND 87. CHANCE
OF SHOWERS 30 PERCENT.
SATURDAY NIGHT THROUGH SUNDAY
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS. LOCALLY HEAVY SHOWERS POSSIBLE. SOUTHWEST
WINDS 15 TO 20 MPH WITH GUSTS UP TO 30 MPH IN THUNDERSTORMS. LOWS
AROUND 77. HIGHS AROUND 86. CHANCE OF SHOWERS 40 PERCENT.
SUNDAY NIGHT THROUGH WEDNESDAY
MOSTLY CLOUDY WITH A 40 PERCENT
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOCALLY HEAVY
SHOWERS POSSIBLE. LOWS IN THE UPPER 70S. HIGHS IN THE MID 80S.
WEDNESDAY NIGHT AND THURSDAY
MOSTLY CLOUDY WITH SCATTERED SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 70S. HIGHS
IN THE MID 80S. CHANCE OF SHOWERS 50 PERCENT.
MPZ002-003-202145-
TINIAN-SAIPAN-
308 PM CHST THU AUG 20 2026
TONIGHT
MOSTLY CLOUDY WITH ISOLATED SHOWERS. NORTHEAST WINDS 10
TO 15 MPH, BECOMING 5 TO 10 MPH AFTER MIDNIGHT. LOWS AROUND 78.
CHANCE OF SHOWERS 20 PERCENT.
FRIDAY
PARTLY CLOUDY WITH ISOLATED SHOWERS IN THE MORNING, THEN
SCATTERED ISLAND EFFECT SHOWERS AND ISOLATED THUNDERSTORMS IN THE
AFTERNOON. LIGHT AND VARIABLE WINDS BECOMING NORTHWEST AROUND 10 MPH
IN THE AFTERNOON. HIGHS AROUND 86. CHANCE OF SHOWERS 30 PERCENT.
FRIDAY NIGHT
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOCALLY HEAVY SHOWERS POSSIBLE. WEST WINDS 10 TO 15
MPH. LOWS AROUND 77. CHANCE OF SHOWERS 30 PERCENT.
SATURDAY THROUGH SUNDAY
BREEZY. MOSTLY CLOUDY WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS. LOCALLY HEAVY SHOWERS POSSIBLE.
SOUTHWEST WINDS 20 TO 25 MPH WITH GUSTS UP TO 35 MPH IN
THUNDERSTORMS. HIGHS AROUND 87. LOWS AROUND 77. CHANCE OF SHOWERS 40
PERCENT.
SUNDAY NIGHT THROUGH WEDNESDAY
MOSTLY CLOUDY WITH A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE MID 70S.
HIGHS IN THE MID 80S. CHANCE OF SHOWERS 30 PERCENT.
WEDNESDAY NIGHT THROUGH THURSDAY
MOSTLY CLOUDY WITH A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE MID 70S.
HIGHS IN THE MID 80S. CHANCE OF SHOWERS 40 PERCENT.
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