329
FZPQ50 PGUM 081800
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
400 AM CHST SUN AUG 9 2026
DISCUSSION
HAZARDOUS SURF AND A HIGH RISK OF RIP CURRENTS ARE
EXPECTED TO CONTINUE ALONG WEST AND NORTH FACING REEFS THROUGH
THE MIDDLE OF NEXT WEEK, AND THE HIGH SURF ADVISORY AND HIGH RIP
CURRENT RISK HAVE BEEN EXTENDED THROUGH THURSDAY AFTERNOON. A
MODERATE RISK OF LIGHTNING IS EXPECTED SUNDAY THROUGH EARLY NEXT
WEEK, MAINLY FOR TINIAN AND SAIPAN.
GUZ001-MPZ001>003-090800-
GUAM-ROTA-TINIAN-SAIPAN-
400 AM CHST SUN AUG 9 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 AM SATURDAY
THROUGH 600 PM MONDAY
TODAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............9 TO 11 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............8 TO 10 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 3 TO 8 FEET.
PRIMARY PERIOD...............11 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 3 FEET.
TERTIARY PERIOD..............12 SECONDS.
WATER TEMPERATURE
SATELLITE ESTIMATE..........85 DEGREES.
MAX HEAT INDEX.........AROUND 101.
WINDS...............BREEZY. SOUTHWEST AT 15 TO 25 MPH.
TONIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............8 TO 10 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............8 TO 10 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 4 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 3 FEET.
TERTIARY PERIOD..............11 SECONDS.
WINDS...............SOUTHWEST AT 15 TO 20 MPH.
SUNDAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............8 TO 10 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............8 TO 10 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 4 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 3 FEET.
TERTIARY PERIOD..............11 SECONDS.
MAX HEAT INDEX.........AROUND 107.
WINDS...............BREEZY. SOUTHWEST AT 15 TO 25 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE -0.2 FEET AT 10:31 AM SUNDAY
HIGH TIDE 2.4 FEET AT 6:22 PM SUNDAY
LOW TIDE 1.9 FEET AT 10:52 PM SUNDAY
HIGH TIDE 2.6 FEET AT 3:47 AM MONDAY
LOW TIDE -0.4 FEET AT 11:33 AM MONDAY
HIGH TIDE 2.5 FEET AT 7:10 PM MONDAY
AT ROTA ISLAND...
LOW TIDE -0.2 FEET AT 10:25 AM SUNDAY
HIGH TIDE 2.3 FEET AT 6:19 PM SUNDAY
LOW TIDE 1.8 FEET AT 10:46 PM SUNDAY
HIGH TIDE 2.4 FEET AT 3:44 AM MONDAY
LOW TIDE -0.3 FEET AT 11:27 AM MONDAY
HIGH TIDE 2.4 FEET AT 7:07 PM MONDAY
AT TINIAN ISLAND...
LOW TIDE -0.1 FEET AT 10:08 AM SUNDAY
HIGH TIDE 1.8 FEET AT 6:20 PM SUNDAY
LOW TIDE 0.6 FEET AT 10:29 PM SUNDAY
HIGH TIDE 1.9 FEET AT 3:45 AM MONDAY
LOW TIDE -0.1 FEET AT 11:10 AM MONDAY
HIGH TIDE 1.9 FEET AT 7:08 PM MONDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE -0.4 FEET AT 10:37 AM SUNDAY
HIGH TIDE 2.1 FEET AT 6:44 PM SUNDAY
LOW TIDE 1.8 FEET AT 10:37 PM SUNDAY
HIGH TIDE 2.3 FEET AT 3:28 AM MONDAY
LOW TIDE -0.6 FEET AT 11:34 AM MONDAY
HIGH TIDE 2.2 FEET AT 7:29 PM MONDAY
* 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page