018
FZPQ50 PGUM 261902 CCA
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS...CORRECTED
NATIONAL WEATHER SERVICE TIYAN GU
502 AM CHST THU AUG 27 2026
CORRECTED RIP RISK TONIGHT.
DISCUSSION
WEST-SOUTHWESTERLY MONSOON SWELL DECREASES SLIGHTLY THROUGH TONIGHT
BEFORE GRADUALLY INCREASING AGAIN. A MODERATE RISK OF RIP CURRENTS
ALONG NORTH, SOUTH, AND WEST FACING REEFS CONTINUES OVER THE NEXT FEW
DAYS, BRIEFLY BECOMING LOW FOR SOUTH FACING REEFS TONIGHT. THERE IS
A MODERATE RISK OF LIGHTNING FOR THE NEXT SEVERAL DAYS.
GUZ001-MPZ001>003-271000-
GUAM-ROTA-TINIAN-SAIPAN-
502 AM CHST THU AUG 27 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM THURSDAY
THROUGH 600 PM FRIDAY
TODAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 4 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 2 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............NORTHWEST AT AROUND 2 FEET.
TERTIARY PERIOD..............10 SECONDS.
WATER TEMPERATURE
PAGO BUOY..........84 DEGREES.
MAX HEAT INDEX.........AROUND 102.
WINDS...............WEST AT 5 TO 15 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 4 FEET.
SOUTH FACING REEFS............3 TO 4 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 2 FEET.
SECONDARY PERIOD.............12 SECONDS.
TERTIARY SWELL...............NORTHWEST AT AROUND 2 FEET.
TERTIARY PERIOD..............10 SECONDS.
WINDS...............SOUTHWEST AT 5 TO 15 MPH.
FRIDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 5 FEET.
EAST FACING REEFS............3 TO 4 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 2 FEET.
SECONDARY PERIOD.............13 SECONDS.
TERTIARY SWELL...............NORTHWEST AT AROUND 2 FEET.
TERTIARY PERIOD..............10 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............WEST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 6:18 AM THURSDAY
LOW TIDE 0.1 FEET AT 1:16 PM THURSDAY
HIGH TIDE 2.4 FEET AT 8:06 PM THURSDAY
LOW TIDE 1.3 FEET AT 1:39 AM FRIDAY
HIGH TIDE 2.4 FEET AT 7:01 AM FRIDAY
LOW TIDE 0.2 FEET AT 1:50 PM FRIDAY
HIGH TIDE 2.4 FEET AT 8:26 PM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.2 FEET AT 6:15 AM THURSDAY
LOW TIDE 0.1 FEET AT 1:10 PM THURSDAY
HIGH TIDE 2.2 FEET AT 8:03 PM THURSDAY
LOW TIDE 1.3 FEET AT 1:33 AM FRIDAY
HIGH TIDE 2.3 FEET AT 6:58 AM FRIDAY
LOW TIDE 0.1 FEET AT 1:44 PM FRIDAY
HIGH TIDE 2.3 FEET AT 8:23 PM FRIDAY
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 6:16 AM THURSDAY
LOW TIDE 0.0 FEET AT 12:53 PM THURSDAY
HIGH TIDE 1.8 FEET AT 8:04 PM THURSDAY
LOW TIDE 0.4 FEET AT 1:16 AM FRIDAY
HIGH TIDE 1.8 FEET AT 6:59 AM FRIDAY
LOW TIDE 0.1 FEET AT 1:27 PM FRIDAY
HIGH TIDE 1.8 FEET AT 8:24 PM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.0 FEET AT 6:13 AM THURSDAY
LOW TIDE 0.0 FEET AT 1:22 PM THURSDAY
HIGH TIDE 2.0 FEET AT 8:29 PM THURSDAY
LOW TIDE 1.3 FEET AT 1:41 AM FRIDAY
HIGH TIDE 2.0 FEET AT 7:01 AM FRIDAY
LOW TIDE 0.0 FEET AT 1:59 PM FRIDAY
HIGH TIDE 2.1 FEET AT 8:50 PM FRIDAY
* LOW RISK OF RIP CURRENTS - STRONG CURRENTS CAN STILL OCCUR NEAR
JETTIES AND REEF CHANNELS. ALWAYS HAVE A FLOTATION DEVICE WITH YOU
IN THE WATER.
MODERATE RISK OF RIP CURRENTS - WAVE CONDITIONS SUPPORT STRONGER OR
MORE FREQUENT RIP CURRENTS. ALWAYS HAVE A FLOTATION DEVICE WITH YOU
IN THE WATER.
HIGH RISK OF RIP CURRENTS - LARGE WAVES WILL PRODUCE STRONG RIP
CURRENTS, ESPECIALLY ALONG NARROW REEFS AND BEACHES. RIP CURRENTS
WILL BE LIFE THREATENING. IF CAUGHT IN A RIP CURRENT, SWIM PARALLEL
TO THE BEACH RATHER THAN AGAINST THE CURRENT.
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