624
FZPQ50 PGUM 231915
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
515 AM CHST MON AUG 24 2026
DISCUSSION
A HIGH SURF ADVISORY AND HIGH RIP CURRENT RISK STATEMENT REMAIN IN
EFFECT THROUGH THIS AFTERNOON. SIGNIFICANT SOUTHWESTERLY SWELL
DRIVEN BY THE MONSOON PATTERN AND TROPICAL DEPRESSION 19W, WELL
NORTH-NORTHWEST OF YAP, CONTINUES TO PRODUCE HAZARDOUS SURF AND
DANGEROUS RIP CURRENTS ALONG WEST-FACING REEFS THROUGH THIS
AFTERNOON, POTENTIALLY THROUGH TONIGHT. A MODERATE RISK OF RIP
CURRENTS CONTINUES ALONG NORTH-,EAST-, AND SOUTH-FACING REEFS OVER
THE NEXT FEW DAYS. THERE IS A MODERATE RISK OF LIGHTNING FOR THE
NEXT SEVERAL DAYS.
GUZ001-MPZ001>003-241100-
GUAM-ROTA-TINIAN-SAIPAN-
515 AM CHST MON AUG 24 2026
...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST THIS AFTERNOON ALONG
WEST FACING REEFS...
...HIGH RISK OF RIP CURRENTS UNTIL 4 PM CHST THIS AFTERNOON
ALONG WEST FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM MONDAY
THROUGH 600 PM TUESDAY
TODAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............5 TO 7 FEET.
WEST FACING REEFS............8 TO 9 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 7 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTH AT 2 TO 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
TERTIARY SWELL...............SOUTHEAST AT 2 TO 3 FEET.
TERTIARY PERIOD..............8 SECONDS.
WATER TEMPERATURE
PAGO BAY BUOY..........84 DEGREES.
MAX HEAT INDEX.........AROUND 101.
WINDS...............SOUTHWEST AT 10 TO 15 MPH WITH GUSTS TO 25 MPH
NEAR HEAVIER SHOWERS.
TONIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............5 TO 7 FEET.
WEST FACING REEFS............AROUND 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 6 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTH AT 2 TO 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
TERTIARY SWELL...............EAST AT AROUND 2 FEET.
TERTIARY PERIOD..............12 SECONDS.
WINDS...............SOUTHWEST AT 10 TO 15 MPH WITH GUSTS TO 25 MPH
NEAR HEAVIER SHOWERS.
TUESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............5 TO 6 FEET.
WEST FACING REEFS............6 TO 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................SOUTHWEST AT 5 TO 7 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHWEST AT 2 TO 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
TERTIARY SWELL...............EAST AT AROUND 2 FEET.
TERTIARY PERIOD..............12 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............SOUTHWEST AT 5 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 0.2 FEET AT 11:14 AM MONDAY
HIGH TIDE 2.2 FEET AT 6:52 PM MONDAY
LOW TIDE 1.7 FEET AT 11:56 PM MONDAY
HIGH TIDE 2.2 FEET AT 4:40 AM TUESDAY
LOW TIDE 0.1 FEET AT 12:00 PM TUESDAY
HIGH TIDE 2.3 FEET AT 7:20 PM TUESDAY
LOW TIDE 1.6 FEET AT 12:32 AM WEDNESDAY
AT ROTA ISLAND...
LOW TIDE 0.2 FEET AT 11:08 AM MONDAY
HIGH TIDE 2.1 FEET AT 6:49 PM MONDAY
LOW TIDE 1.6 FEET AT 11:50 PM MONDAY
HIGH TIDE 2.0 FEET AT 4:37 AM TUESDAY
LOW TIDE 0.1 FEET AT 11:54 AM TUESDAY
HIGH TIDE 2.1 FEET AT 7:17 PM TUESDAY
LOW TIDE 1.5 FEET AT 12:26 AM WEDNESDAY
AT TINIAN ISLAND...
LOW TIDE 0.1 FEET AT 10:51 AM MONDAY
HIGH TIDE 1.6 FEET AT 6:50 PM MONDAY
LOW TIDE 0.5 FEET AT 11:33 PM MONDAY
HIGH TIDE 1.6 FEET AT 4:38 AM TUESDAY
LOW TIDE 0.0 FEET AT 11:37 AM TUESDAY
HIGH TIDE 1.7 FEET AT 7:18 PM TUESDAY
LOW TIDE 0.5 FEET AT 12:09 AM WEDNESDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 0.1 FEET AT 11:19 AM MONDAY
HIGH TIDE 1.9 FEET AT 7:21 PM MONDAY
LOW TIDE 1.6 FEET AT 11:25 PM MONDAY
HIGH TIDE 1.9 FEET AT 4:28 AM TUESDAY
LOW TIDE 0.0 FEET AT 12:02 PM TUESDAY
HIGH TIDE 1.9 FEET AT 7:44 PM TUESDAY
LOW TIDE 1.5 FEET AT 12:09 AM WEDNESDAY
* 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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