979
FZPQ50 PGUM 301117
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
917 PM CHST WED SEP 30 2026
DISCUSSION
AS TROPICAL DEPRESSION (TD) 26W APPROACHES THE FAR
NORTHERN CNMI, SURF WILL INCREASE ALONG ALL REEFS, WITH WEST-FACING
REEFS MOST LIKELY REACHING HAZARDOUS CRITERIA ON THURSDAY NIGHT. A
HIGH SURF ADVISORY AND A HIGH RIP CURRENT RISK STATEMENT WILL MOST
LIKELY BE ISSUED WITH THE NEXT FORECAST UPDATE.
GUZ001-MPZ001-010230-
GUAM-ROTA-
917 PM CHST WED SEP 30 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 851 PM WEDNESDAY
THROUGH 600 AM FRIDAY
REST OF TONIGHT
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............6 TO 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 6 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
WATER TEMPERATURE
PAGO BUOY..........86 DEGREES.
WINDS...............WEST AT 10 TO 15 MPH.
THURSDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............5 TO 7 FEET.
WEST FACING REEFS............6 TO 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 7 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTH AT AROUND 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............WEST AT 10 TO 20 MPH.
THURSDAY NIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 7 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............6 TO 8 FEET.
WEST FACING REEFS............7 TO 9 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT AROUND 9 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTH AT AROUND 4 FEET.
SECONDARY PERIOD.............11 SECONDS.
WINDS...............WINDY. WEST AT 20 TO 30 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 9:10 PM WEDNESDAY
LOW TIDE -0.3 FEET AT 4:24 AM THURSDAY
HIGH TIDE 2.3 FEET AT 11:32 AM THURSDAY
LOW TIDE 1.6 FEET AT 4:45 PM THURSDAY
HIGH TIDE 2.3 FEET AT 9:45 PM THURSDAY
LOW TIDE -0.3 FEET AT 5:18 AM FRIDAY
HIGH TIDE 2.2 FEET AT 12:56 PM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.2 FEET AT 9:07 PM WEDNESDAY
LOW TIDE -0.2 FEET AT 4:18 AM THURSDAY
HIGH TIDE 2.1 FEET AT 11:29 AM THURSDAY
LOW TIDE 1.5 FEET AT 4:39 PM THURSDAY
HIGH TIDE 2.2 FEET AT 9:42 PM THURSDAY
LOW TIDE -0.3 FEET AT 5:12 AM FRIDAY
HIGH TIDE 2.1 FEET AT 12:53 PM FRIDAY
MPZ002-003-010230-
TINIAN-SAIPAN-
917 PM CHST WED SEP 30 2026
THE ISLANDS OF TINIAN AND SAIPAN ARE NOW UNDER A TROPICAL CYCLONE
WATCH OR WARNING. PLEASE REFER TO THE TROPICAL CYCLONE LOCAL
STATEMENT WTPQ82 PGUM HLSPQ2 FOR MORE UPDATED AND DETAILED SURF ZONE
AND HAZARD INFORMATION.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 9:08 PM WEDNESDAY
LOW TIDE -0.1 FEET AT 4:01 AM THURSDAY
HIGH TIDE 1.7 FEET AT 11:30 AM THURSDAY
LOW TIDE 0.5 FEET AT 4:22 PM THURSDAY
HIGH TIDE 1.7 FEET AT 9:43 PM THURSDAY
LOW TIDE -0.1 FEET AT 4:55 AM FRIDAY
HIGH TIDE 1.6 FEET AT 12:54 PM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.1 FEET AT 9:12 PM WEDNESDAY
LOW TIDE -0.2 FEET AT 4:32 AM THURSDAY
HIGH TIDE 2.1 FEET AT 12:06 PM THURSDAY
LOW TIDE 1.5 FEET AT 4:53 PM THURSDAY
HIGH TIDE 2.1 FEET AT 9:43 PM THURSDAY
LOW TIDE -0.2 FEET AT 5:29 AM FRIDAY
HIGH TIDE 2.1 FEET AT 1:22 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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