589
FZPQ50 PGUM 301931
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
531 AM CHST MON AUG 31 2026
DISCUSSION
THERE WILL BE A MODERATE RISK OF RIP CURRENTS ALONG WEST, NORTH
AND EAST-FACING REEFS FOR THE NEXT FEW DAYS. THE RISK MAY REACH HIGH
ALONG WEST-FACING REEFS AROUND MIDWEEK AS A WEST SWELL BUILDS IN.
THERE WILL BE A MODERATE RISK OF LIGHTNING FOR GUAM THROUGH THURSDAY
NIGHT.
GUZ001-MPZ001>003-311045-
GUAM-ROTA-TINIAN-SAIPAN-
531 AM CHST MON AUG 31 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM MONDAY
THROUGH 600 PM TUESDAY
TODAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 2 TO 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
WATER TEMPERATURE
APRA HARBOR BUOY..........86 DEGREES.
MAX HEAT INDEX.........AROUND 101.
WINDS...............WEST AT 5 TO 10 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 2 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
WINDS...............NORTHWEST AT 5 TO 10 MPH.
TUESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............5 TO 7 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............WEST TO NORTHWEST AT AROUND 10 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 0.8 FEET AT 3:26 AM MONDAY
HIGH TIDE 2.4 FEET AT 9:17 AM MONDAY
LOW TIDE 0.7 FEET AT 3:32 PM MONDAY
HIGH TIDE 2.5 FEET AT 9:33 PM MONDAY
LOW TIDE 0.6 FEET AT 4:06 AM TUESDAY
HIGH TIDE 2.3 FEET AT 10:13 AM TUESDAY
LOW TIDE 1.0 FEET AT 4:10 PM TUESDAY
AT ROTA ISLAND...
LOW TIDE 0.7 FEET AT 3:20 AM MONDAY
HIGH TIDE 2.3 FEET AT 9:14 AM MONDAY
LOW TIDE 0.7 FEET AT 3:26 PM MONDAY
HIGH TIDE 2.4 FEET AT 9:30 PM MONDAY
LOW TIDE 0.5 FEET AT 4:00 AM TUESDAY
HIGH TIDE 2.2 FEET AT 10:10 AM TUESDAY
LOW TIDE 0.9 FEET AT 4:04 PM TUESDAY
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 9:15 AM MONDAY
LOW TIDE 0.2 FEET AT 3:09 PM MONDAY
HIGH TIDE 1.9 FEET AT 9:31 PM MONDAY
LOW TIDE 0.2 FEET AT 3:43 AM TUESDAY
HIGH TIDE 1.7 FEET AT 10:11 AM TUESDAY
LOW TIDE 0.3 FEET AT 3:47 PM TUESDAY
HIGH TIDE 1.8 FEET AT 9:58 PM TUESDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 0.7 FEET AT 3:36 AM MONDAY
HIGH TIDE 2.0 FEET AT 9:30 AM MONDAY
LOW TIDE 0.5 FEET AT 3:41 PM MONDAY
HIGH TIDE 2.1 FEET AT 9:52 PM MONDAY
LOW TIDE 0.5 FEET AT 4:17 AM TUESDAY
HIGH TIDE 1.9 FEET AT 10:32 AM TUESDAY
LOW TIDE 0.8 FEET AT 4:16 PM TUESDAY
* 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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