551
FZPQ50 PGUM 110824
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
624 PM CHST TUE AUG 11 2026
DISCUSSION
SIGNIFICANT WEST SWELL FROM THE REGIONAL MONSOON
PATTERN, MIXED WITH A NORTHWESTERLY SWELL, CONTINUES TO PRODUCE
HAZARDOUS SURF AND A HIGH RISK OF RIP CURRENTS ALONG WEST AND NORTH
FACING REEFS THROUGH THURSDAY AFTERNOON, POTENTIALLY DROPPING BELOW
HAZARDOUS LEVELS BY TOMORROW ALONG NORTH-FACING REEFS. A MODERATE
RISK OF RIP CURRENTS CONTINUES ALONG SOUTH-FACING REEFS OVER THE NEXT
FEW DAYS. A MODERATE RISK OF LIGHTNING IS EXPECTED THROUGH TONIGHT.
GUZ001-MPZ001>003-112330-
GUAM-ROTA-TINIAN-SAIPAN-
624 PM CHST TUE AUG 11 2026
...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST THURSDAY ALONG WEST
AND NORTH FACING REEFS...
...HIGH RISK OF RIP CURRENTS THROUGH THURSDAY AFTERNOON ALONG WEST
AND NORTH FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM TUESDAY
THROUGH 600 AM THURSDAY
TONIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............7 TO 9 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............8 TO 10 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 7 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
WATER TEMPERATURE
TANAPAG BUOY.......... 85 DEGREES.
WINDS...............BREEZY. SOUTHWEST AT 15 TO 25 MPH.
WEDNESDAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............6 TO 8 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............4 TO 5 FEET.
WEST FACING REEFS............9 TO 11 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 8 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 2 FEET.
SECONDARY PERIOD.............11 SECONDS.
MAX HEAT INDEX.........AROUND 103.
WINDS...............BREEZY. SOUTHWEST AT 15 TO 25 MPH.
WEDNESDAY NIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............6 TO 8 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............4 TO 5 FEET.
WEST FACING REEFS............8 TO 10 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............SOUTHEAST AT AROUND 2 FEET.
SECONDARY PERIOD.............11 SECONDS.
WINDS...............SOUTHWEST AT 15 TO 20 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.6 FEET AT 7:50 PM TUESDAY
LOW TIDE 1.7 FEET AT 12:55 AM WEDNESDAY
HIGH TIDE 2.7 FEET AT 6:01 AM WEDNESDAY
LOW TIDE -0.4 FEET AT 1:22 PM WEDNESDAY
HIGH TIDE 2.6 FEET AT 8:25 PM WEDNESDAY
LOW TIDE 1.5 FEET AT 1:46 AM THURSDAY
HIGH TIDE 2.8 FEET AT 6:58 AM THURSDAY
AT ROTA ISLAND...
HIGH TIDE 2.4 FEET AT 7:47 PM TUESDAY
LOW TIDE 1.6 FEET AT 12:49 AM WEDNESDAY
HIGH TIDE 2.6 FEET AT 5:58 AM WEDNESDAY
LOW TIDE -0.4 FEET AT 1:16 PM WEDNESDAY
HIGH TIDE 2.4 FEET AT 8:22 PM WEDNESDAY
LOW TIDE 1.4 FEET AT 1:40 AM THURSDAY
HIGH TIDE 2.6 FEET AT 6:55 AM THURSDAY
AT TINIAN ISLAND...
HIGH TIDE 1.9 FEET AT 7:48 PM TUESDAY
LOW TIDE 0.6 FEET AT 12:32 AM WEDNESDAY
HIGH TIDE 2.0 FEET AT 5:59 AM WEDNESDAY
LOW TIDE -0.1 FEET AT 12:59 PM WEDNESDAY
HIGH TIDE 1.9 FEET AT 8:23 PM WEDNESDAY
LOW TIDE 0.5 FEET AT 1:23 AM THURSDAY
HIGH TIDE 2.0 FEET AT 6:56 AM THURSDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.2 FEET AT 8:08 PM TUESDAY
LOW TIDE 1.6 FEET AT 12:50 AM WEDNESDAY
HIGH TIDE 2.3 FEET AT 5:55 AM WEDNESDAY
LOW TIDE -0.6 FEET AT 1:27 PM WEDNESDAY
HIGH TIDE 2.3 FEET AT 8:43 PM WEDNESDAY
LOW TIDE 1.4 FEET AT 1:53 AM THURSDAY
HIGH TIDE 2.3 FEET AT 7:00 AM THURSDAY
* 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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