863
FZPQ50 PGUM 161931
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
531 AM CHST THU SEP 17 2026
DISCUSSION
THERE IS A MODERATE RISK OF LIGHTNING AND RIP CURRENTS ALONG ALL
REEFS THROUGH AT LEAST TONIGHT. TROPICAL STORM DUJUAN WILL
CONTINUE MOVING NORTH, SO THE NORTHEASTERLY SWELL WILL GRADUALLY
SUBSIDE BY A FOOT OR SO IN THE COMING DAYS.
GUZ001-MPZ001>003-171045-
GUAM-ROTA-TINIAN-SAIPAN-
531 AM CHST THU SEP 17 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............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 6 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............SOUTH AT 3 TO 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
WATER TEMPERATURE
PAGO BUOY..........86 DEGREES.
MAX HEAT INDEX.........AROUND 101.
WINDS...............WEST AT 10 TO 15 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 4 TO 5 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............SOUTH AT 3 TO 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
WINDS...............WEST AT 10 TO 15 MPH.
FRIDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 4 TO 5 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTH AT AROUND 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
MAX HEAT INDEX.........AROUND 102.
WINDS...............SOUTHWEST AT 10 TO 20 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 0.2 FEET AT 5:29 AM THURSDAY
HIGH TIDE 2.0 FEET AT 12:53 PM THURSDAY
LOW TIDE 1.6 FEET AT 5:51 PM THURSDAY
HIGH TIDE 2.0 FEET AT 10:35 PM THURSDAY
LOW TIDE 0.2 FEET AT 6:19 AM FRIDAY
HIGH TIDE 1.9 FEET AT 2:24 PM FRIDAY
LOW TIDE 1.7 FEET AT 7:03 PM FRIDAY
AT ROTA ISLAND...
LOW TIDE 0.2 FEET AT 5:23 AM THURSDAY
HIGH TIDE 1.9 FEET AT 12:50 PM THURSDAY
LOW TIDE 1.5 FEET AT 5:45 PM THURSDAY
HIGH TIDE 1.9 FEET AT 10:32 PM THURSDAY
LOW TIDE 0.2 FEET AT 6:13 AM FRIDAY
HIGH TIDE 1.8 FEET AT 2:21 PM FRIDAY
LOW TIDE 1.6 FEET AT 6:57 PM FRIDAY
AT TINIAN ISLAND...
LOW TIDE 0.1 FEET AT 5:06 AM THURSDAY
HIGH TIDE 1.5 FEET AT 12:51 PM THURSDAY
LOW TIDE 0.5 FEET AT 5:28 PM THURSDAY
HIGH TIDE 1.5 FEET AT 10:33 PM THURSDAY
LOW TIDE 0.1 FEET AT 5:56 AM FRIDAY
HIGH TIDE 1.4 FEET AT 2:22 PM FRIDAY
LOW TIDE 0.6 FEET AT 6:40 PM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 0.2 FEET AT 5:47 AM THURSDAY
HIGH TIDE 1.8 FEET AT 1:18 PM THURSDAY
LOW TIDE 1.5 FEET AT 5:50 PM THURSDAY
HIGH TIDE 1.8 FEET AT 10:37 PM THURSDAY
LOW TIDE 0.3 FEET AT 6:39 AM FRIDAY
HIGH TIDE 1.8 FEET AT 2:46 PM FRIDAY
LOW TIDE 1.6 FEET AT 6:54 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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