556
FZPQ50 PGUM 210600
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
400 PM CHST WED OCT 21 2026
DISCUSSION
A MODERATE RISK OF RIP CURRENTS IS EXPECTED ALONG NORTH,
EAST, AND WEST FACING REEFS OF THE MARIANAS FOR MUCH OF THIS WEEK.
THIS IS DUE TO A STRENGTHENING NORTHEASTERLY SWELL, AND A SECONDARY
WESTERLY SWELL PRODUCED BY DISTANT SUPER TYPHOON CHAMPI.
GUZ001-MPZ001>003-212000-
GUAM-ROTA-TINIAN-SAIPAN-
400 PM CHST WED OCT 21 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM WEDNESDAY
THROUGH 600 AM THURSDAY
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 8 FEET.
EAST FACING REEFS............5 TO 8 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 4 TO 6 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
WATER TEMPERATURE
APRA HARBOR..........84 DEGREES.
WINDS...............NORTHEAST AT 10 TO 15 MPH.
THURSDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 8 FEET.
EAST FACING REEFS............5 TO 8 FEET.
SOUTH FACING REEFS............2 TO 3 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 4 TO 6 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
MAX HEAT INDEX.........AROUND 100.
WINDS...............NORTHEAST AT 10 TO 15 MPH.
THURSDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............6 TO 8 FEET.
EAST FACING REEFS............6 TO 8 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 7 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
WINDS...............EAST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.1 FEET AT 4:55 PM WEDNESDAY
LOW TIDE 1.1 FEET AT 10:57 PM WEDNESDAY
HIGH TIDE 1.8 FEET AT 4:02 AM THURSDAY
LOW TIDE 0.4 FEET AT 10:26 AM THURSDAY
HIGH TIDE 2.2 FEET AT 5:19 PM THURSDAY
LOW TIDE 0.8 FEET AT 11:31 PM THURSDAY
HIGH TIDE 1.9 FEET AT 5:08 AM FRIDAY
AT ROTA ISLAND...
HIGH TIDE 2.0 FEET AT 4:52 PM WEDNESDAY
LOW TIDE 1.0 FEET AT 10:51 PM WEDNESDAY
HIGH TIDE 1.7 FEET AT 3:59 AM THURSDAY
LOW TIDE 0.4 FEET AT 10:20 AM THURSDAY
HIGH TIDE 2.1 FEET AT 5:16 PM THURSDAY
LOW TIDE 0.8 FEET AT 11:25 PM THURSDAY
HIGH TIDE 1.8 FEET AT 5:05 AM FRIDAY
AT TINIAN ISLAND...
HIGH TIDE 1.6 FEET AT 4:53 PM WEDNESDAY
LOW TIDE 0.4 FEET AT 10:34 PM WEDNESDAY
HIGH TIDE 1.3 FEET AT 4:00 AM THURSDAY
LOW TIDE 0.1 FEET AT 10:03 AM THURSDAY
HIGH TIDE 1.6 FEET AT 5:17 PM THURSDAY
LOW TIDE 0.3 FEET AT 11:08 PM THURSDAY
HIGH TIDE 1.4 FEET AT 5:06 AM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.0 FEET AT 5:06 PM WEDNESDAY
LOW TIDE 1.1 FEET AT 10:55 PM WEDNESDAY
HIGH TIDE 1.6 FEET AT 4:09 AM THURSDAY
LOW TIDE 0.4 FEET AT 10:29 AM THURSDAY
HIGH TIDE 2.1 FEET AT 5:28 PM THURSDAY
LOW TIDE 0.9 FEET AT 11:26 PM THURSDAY
HIGH TIDE 1.7 FEET AT 5:16 AM 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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