853
FZPQ50 PGUM 081703
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
303 AM CHST THU OCT 9 2025
DISCUSSION
THERE WILL BE A MODERATE RISK OF RIP CURRENTS ALONG
EAST FACING REEFS AND BEACHES, WITH A LOW RISK ELSEWHERE. A LONG-
PERIOD NORTH SWELL FROM DISTANT TYPHOON HALONG WILL INCREASE SURF
ALONG NORTH FACING REEFS AND BEACHES, WITH A MODERATE RISK OF RIP
CURRENTS BY SATURDAY. THERE WILL ALSO BE A MODERATE RISK OF
LIGHTNING THE NEXT FEW DAYS.
GUZ001-MPZ001>003-090700-
GUAM-ROTA-TINIAN-SAIPAN-
303 AM CHST THU OCT 9 2025
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............2 TO 4 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
WATER TEMPERATURE
RITIDIAN BUOY..........86 DEGREES.
MAX HEAT INDEX.........AROUND 100.
WINDS...............NORTHEAST AT AROUND 10 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............2 TO 4 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
WINDS...............NORTHEAST AT 10 TO 15 MPH.
FRIDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............2 TO 4 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............1 TO 3 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 4 FEET.
PRIMARY PERIOD...............8 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............NORTHEAST AT AROUND 10 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.5 FEET AT 9:16 AM THURSDAY
LOW TIDE 1.1 FEET AT 2:59 PM THURSDAY
HIGH TIDE 2.5 FEET AT 8:21 PM THURSDAY
LOW TIDE -0.5 FEET AT 3:24 AM FRIDAY
HIGH TIDE 2.5 FEET AT 10:19 AM FRIDAY
LOW TIDE 1.4 FEET AT 3:49 PM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.4 FEET AT 9:13 AM THURSDAY
LOW TIDE 1.0 FEET AT 2:53 PM THURSDAY
HIGH TIDE 2.4 FEET AT 8:18 PM THURSDAY
LOW TIDE -0.4 FEET AT 3:18 AM FRIDAY
HIGH TIDE 2.3 FEET AT 10:16 AM FRIDAY
LOW TIDE 1.3 FEET AT 3:43 PM FRIDAY
AT TINIAN ISLAND...
HIGH TIDE 1.6 FEET AT 9:04 AM THURSDAY
LOW TIDE 0.9 FEET AT 2:17 PM THURSDAY
HIGH TIDE 1.8 FEET AT 7:36 PM THURSDAY
LOW TIDE -0.4 FEET AT 3:07 AM FRIDAY
HIGH TIDE 1.6 FEET AT 10:20 AM FRIDAY
LOW TIDE 1.1 FEET AT 3:08 PM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.3 FEET AT 9:37 AM THURSDAY
LOW TIDE 1.1 FEET AT 3:09 PM THURSDAY
HIGH TIDE 2.2 FEET AT 8:25 PM THURSDAY
LOW TIDE -0.4 FEET AT 3:30 AM FRIDAY
HIGH TIDE 2.3 FEET AT 10:45 AM FRIDAY
LOW TIDE 1.4 FEET AT 3:58 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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