570
FZPQ50 PGUM 300623
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
423 PM CHST THU OCT 30 2025
DISCUSSION
THERE WILL BE A MODERATE RISK FOR RIP CURRENTS ALONG NORTH AND EAST
FACING REEFS THROUGH FRIDAY NIGHT. A MODERATE RISK FOR RIP CURRENTS
IS EXPECTED FOR SOUTH FACING REEFS FRIDAY NIGHT AS WELL. A TRADE-WIND
SWELL WILL MOVE INTO THE REGION THIS WEEKEND BRINGING THE CHANCE FOR
HAZARDOUS SURF AND A HIGH RISK FOR RIP CURRENTS LATE THIS WEEKEND
AND INTO NEXT WEEK. THERE WILL BE A MODERATE RISK FOR THUNDERSTORMS
ON SATURDAY AND AGAIN SUNDAY NIGHT THROUGH WEDNESDAY.
GUZ001-MPZ001>003-302130-
GUAM-ROTA-TINIAN-SAIPAN-
423 PM CHST THU OCT 30 2025
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM THURSDAY
THROUGH 600 AM SATURDAY
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............AROUND 1 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 5 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 1 FEET.
SECONDARY PERIOD.............11 SECONDS.
WATER TEMPERATURE
RITIDIAN BUOY..........86 DEGREES.
WINDS...............EAST AT 10 TO 15 MPH.
FRIDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............AROUND 1 FOOT.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 5 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 1 FEET.
SECONDARY PERIOD.............11 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............EAST AT 10 TO 15 MPH.
FRIDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............2 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 3 TO 6 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTH AT AROUND 2 FEET.
SECONDARY PERIOD.............11 SECONDS.
WINDS...............EAST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 1.4 FEET AT 9:30 PM THURSDAY
HIGH TIDE 1.6 FEET AT 1:08 AM FRIDAY
LOW TIDE 0.1 FEET AT 8:34 AM FRIDAY
HIGH TIDE 2.2 FEET AT 4:11 PM FRIDAY
LOW TIDE 1.2 FEET AT 10:15 PM FRIDAY
HIGH TIDE 1.7 FEET AT 2:49 AM SATURDAY
AT ROTA ISLAND...
LOW TIDE 1.4 FEET AT 9:24 PM THURSDAY
HIGH TIDE 1.5 FEET AT 1:05 AM FRIDAY
LOW TIDE 0.1 FEET AT 8:28 AM FRIDAY
HIGH TIDE 2.0 FEET AT 4:08 PM FRIDAY
LOW TIDE 1.1 FEET AT 10:09 PM FRIDAY
HIGH TIDE 1.6 FEET AT 2:46 AM SATURDAY
AT TINIAN ISLAND...
LOW TIDE 1.1 FEET AT 8:47 PM THURSDAY
HIGH TIDE 1.2 FEET AT 12:06 AM FRIDAY
LOW TIDE 0.0 FEET AT 8:08 AM FRIDAY
HIGH TIDE 1.5 FEET AT 3:46 PM FRIDAY
LOW TIDE 0.9 FEET AT 9:34 PM FRIDAY
HIGH TIDE 1.2 FEET AT 1:43 AM SATURDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 1.5 FEET AT 9:47 PM THURSDAY
HIGH TIDE 1.6 FEET AT 12:57 AM FRIDAY
LOW TIDE 0.2 FEET AT 8:43 AM FRIDAY
HIGH TIDE 2.1 FEET AT 4:24 PM FRIDAY
LOW TIDE 1.2 FEET AT 10:22 PM FRIDAY
HIGH TIDE 1.6 FEET AT 2:46 AM SATURDAY
* 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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