267
FZPQ50 PGUM 180526
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
326 PM CHST SUN OCT 18 2026
DISCUSSION
TYPHOON WARNING REMAINS IN EFFECT FOR GUAM AND ROTA.
HAZARDOUS SURF AND HIGH RISK OF RIP CURRENTS ARE EXPECTED ALONG EAST
AND SOUTH FACING REEFS OF TINIAN AND SAIPAN THROUGH AT LEAST LATE
TONIGHT. A MODERATE RISK OF LIGHTNING IS EXPECTED TONIGHT.
GUZ001-MPZ001-180800-
GUAM-ROTA-
326 PM CHST SUN OCT 18 2026
THE ISLANDS OF GUAM AND ROTA ARE NOW UNDER A TROPICAL CYCLONE
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 APRA HARBOR, GUAM...
HIGH TIDE 1.9 FEET AT 2:55 PM SUNDAY
LOW TIDE 1.6 FEET AT 8:19 PM SUNDAY
HIGH TIDE 1.7 FEET AT 11:25 PM SUNDAY
LOW TIDE 0.2 FEET AT 7:32 AM MONDAY
HIGH TIDE 2.0 FEET AT 3:48 PM MONDAY
LOW TIDE 1.5 FEET AT 9:31 PM MONDAY
HIGH TIDE 1.6 FEET AT 12:58 AM TUESDAY
AT ROTA ISLAND...
HIGH TIDE 1.8 FEET AT 2:52 PM SUNDAY
LOW TIDE 1.5 FEET AT 8:13 PM SUNDAY
HIGH TIDE 1.6 FEET AT 11:22 PM SUNDAY
LOW TIDE 0.2 FEET AT 7:26 AM MONDAY
HIGH TIDE 1.9 FEET AT 3:45 PM MONDAY
LOW TIDE 1.4 FEET AT 9:25 PM MONDAY
HIGH TIDE 1.5 FEET AT 12:55 AM TUESDAY
MPZ002-003-180800-
TINIAN-SAIPAN-
326 PM CHST SUN OCT 18 2026
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 AM CHST MONDAY ALONG
EAST AND SOUTH FACING REEFS...
..WIND ADVISORY REMAINS IN EFFECT UNTIL 4 AM CHST MONDAY
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT ALONG
EAST AND SOUTH FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM SUNDAY
THROUGH 600 PM MONDAY
TODAY
RIP CURRENT RISK.....HIGH. HUGE WAVES WILL PRODUCE DEADLY RIP
CURRENTS. STAY OUT OF THE WATER.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............10 TO 14 FEET.
SOUTH FACING REEFS............10 TO 14 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHEAST TO SOUTH AT 8 TO 10 FEET.
PRIMARY PERIOD...............10 SECONDS.
WATER TEMPERATURE
APRA HARBOR..........84 DEGREES.
MAX HEAT INDEX.........AROUND 98.
WINDS...............WINDY. SOUTHEAST AT 25 TO 35 MPH.
TONIGHT
RIP CURRENT RISK.....HIGH. *
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............10 TO 12 FEET.
SOUTH FACING REEFS............10 TO 12 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHEAST TO SOUTH 6 TO 9 FEET.
PRIMARY PERIOD...............11 SECONDS.
WINDS...............WINDY. SOUTHEAST AT 25 TO 30 MPH.
MONDAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............2 TO 4 FEET.
EAST FACING REEFS............8 TO 10 FEET.
SOUTH FACING REEFS............6 TO 8 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTH AT 4 TO 6 FEET.
PRIMARY PERIOD...............9 SECONDS.
MAX HEAT INDEX.........AROUND 96.
WINDS...............BREEZY. SOUTHEAST AT 15 TO 25 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT TINIAN ISLAND...
HIGH TIDE 1.4 FEET AT 2:53 PM SUNDAY
LOW TIDE 0.5 FEET AT 7:56 PM SUNDAY
HIGH TIDE 1.2 FEET AT 11:23 PM SUNDAY
LOW TIDE 0.1 FEET AT 7:09 AM MONDAY
HIGH TIDE 1.5 FEET AT 3:46 PM MONDAY
LOW TIDE 0.5 FEET AT 9:08 PM MONDAY
HIGH TIDE 1.2 FEET AT 12:56 AM TUESDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 1.9 FEET AT 3:13 PM SUNDAY
LOW TIDE 0.3 FEET AT 7:44 AM MONDAY
HIGH TIDE 1.9 FEET AT 4:08 PM MONDAY
LOW TIDE 1.5 FEET AT 9:56 PM MONDAY
HIGH TIDE 1.6 FEET AT 12:40 AM TUESDAY
LOW TIDE 0.3 FEET AT 8:46 AM TUESDAY
HIGH TIDE 2.0 FEET AT 4:41 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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