487
FPMY50 PGUM 211346 CCA
ZFPGUM
ZONE FORECAST FOR GUAM AND THE NORTHERN MARIANAS...CORRECTED
NATIONAL WEATHER SERVICE TIYAN GU
1146 PM CHST FRI AUG 21 2026
GUZ001-MPZ001-212030-
GUAM-ROTA-
1146 PM CHST FRI AUG 21 2026
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON
ALONG EAST FACING REEFS...
REST OF TONIGHT
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. WEST WINDS 10 TO 15 MPH. LOWS AROUND 77. CHANCE OF
SHOWERS 30 PERCENT.
SATURDAY
BREEZY. PARTLY SUNNY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. SOUTHWEST WINDS 15 TO 25 MPH. HIGHS AROUND 87. CHANCE
OF SHOWERS 30 PERCENT.
SATURDAY NIGHT
BREEZY. MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS. SOUTHWEST WINDS 15 TO 25 MPH. LOWS AROUND
77. CHANCE OF SHOWERS 50 PERCENT.
SUNDAY THROUGH MONDAY
BREEZY. MOSTLY CLOUDY WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS. SOUTHWEST WINDS 15 TO 25 MPH.
HIGHS AROUND 86. LOWS AROUND 77. CHANCE OF SHOWERS 30 PERCENT.
MONDAY NIGHT THROUGH WEDNESDAY
MOSTLY CLOUDY WITH A 50 PERCENT
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE
UPPER 70S. HIGHS IN THE MID 80S.
WEDNESDAY NIGHT
CLOUDY WITH SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 70S. CHANCE OF SHOWERS 60 PERCENT.
THURSDAY
BREEZY. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS. HIGHS IN THE MID 80S. CHANCE OF SHOWERS
60 PERCENT.
THURSDAY NIGHT AND FRIDAY
BREEZY. MOSTLY CLOUDY. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 70S.
HIGHS IN THE MID 80S. CHANCE OF SHOWERS 50 PERCENT.
MPZ002-003-212030-
TINIAN-SAIPAN-
1146 PM CHST FRI AUG 21 2026
CORRECTED TRANSMISSION VERSION.
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST SUNDAY ALONG
NORTH FACING REEFS...
...HIGH RIP CURRENT RISK REMAINS THROUGH SUNDAY AFTERNOON ALONG
NORTH AND EAST FACING REEFS...
..TROPICAL STORM WATCH REMAINS IN EFFECT
REST OF TONIGHT
TROPICAL STORM CONDITIONS POSSIBLE. MOSTLY CLOUDY
WITH SCATTERED SHOWERS, BECOMING NUMEROUS AND HEAVY AFTER MIDNIGHT.
ISOLATED THUNDERSTORMS. LOCALLY HEAVY SHOWERS POSSIBLE. WEST WINDS 10
TO 15 MPH, INCREASING TO 30 TO 40 MPH AFTER MIDNIGHT. LOWS AROUND
75. CHANCE OF SHOWERS 60 PERCENT.
SATURDAY AND SATURDAY NIGHT
TROPICAL STORM CONDITIONS POSSIBLE.
CLOUDY. PERIODS OF RAIN, WIDESPREAD HEAVY SHOWERS AND SCATTERED
THUNDERSTORMS. SOUTHWEST WINDS 30 TO 40 MPH WITH GUSTS TO 45 MPH NEAR
HEAVIER SHOWERS. HIGHS NEAR 84. LOWS AROUND 76. CHANCE OF SHOWERS 90
PERCENT.
SUNDAY AND SUNDAY NIGHT
WINDY. MOSTLY CLOUDY. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS. SOUTH WINDS 20 TO 30 MPH. HIGHS AROUND
87. LOWS AROUND 78. CHANCE OF SHOWERS 30 PERCENT.
MONDAY
BREEZY. PARTLY SUNNY WITH ISOLATED SHOWERS. SOUTH WINDS 15
TO 25 MPH. HIGHS NEAR 88. CHANCE OF SHOWERS 20 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS.
LOWS IN THE UPPER 70S.
TUESDAY
PARTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE UPPER 80S.
TUESDAY NIGHT THROUGH FRIDAY
BREEZY. MOSTLY CLOUDY WITH A CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 70S.
HIGHS IN THE MID 80S. CHANCE OF SHOWERS 50 PERCENT.
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