586
FZPQ50 PGUM 011621
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
221 AM CHST SUN AUG 2 2026
DISCUSSION
THERE IS A HIGH RISK OF RIP CURRENTS ALONG EAST FACING REEFS OF THE
MARIANAS, AND MODERATE ELSEWHERE. LONG-PERIOD EAST TO NORTHEAST SWELL,
EMANATING FROM DISTANT TYPHOON DOLPHIN, IS EXPECTED TO DEVELOP A HIGH
RISK OF RIP CURRENTS ALONG NORTH-FACING REEFS BEGINNING TONIGHT, WITH
HAZARDOUS SURF ALSO LIKELY TO DEVELOP ALONG NORTH AND EAST-FACING REEFS
TONIGHT. AS DOLPHIN PASSES THE FAR NORTHERN CNMI, THE LONG-PERIOD SWELL
DIRECTION IS EXPECTED TO SHIFT NORTH EARLY NEXT WEEK, AND THEN
NORTHWEST. AS IT DOES SO, A HIGH RISK OF RIP CURRENTS, AND HAZARDOUS
SURF, IS EXPECTED TO DEVELOP ALONG WEST FACING REEFS LATER THIS WEEK.
A MODERATE RISK OF LIGHTNING IS EXPECTED THROUGH AT LEAST TUESDAY.
GUZ001-MPZ001>003-020800-
GUAM-ROTA-TINIAN-SAIPAN-
221 AM CHST SUN AUG 2 2026
...HIGH RISK OF RIP CURRENTS FROM THIS AFTERNOON THROUGH
SATURDAY AFTERNOON ALONG EAST FACING REEFS...
...HAZARDOUS SURF MAY DEVELOP ALONG NORTH AND EAST FACING REEFS
TONIGHT...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM SUNDAY
THROUGH 600 PM MONDAY
TODAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 8 FEET.
EAST FACING REEFS............8 TO 11 FEET.
SOUTH FACING REEFS............4 TO 5 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................EAST AT 5 TO 7 FEET.
PRIMARY PERIOD...............14 TO 15 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 4 FEET.
SECONDARY PERIOD.............9 SECONDS.
WATER TEMPERATURE
TANAPAG BUOY..........85 DEGREES.
MAX HEAT INDEX.........AROUND 102.
WINDS...............BREEZY. WEST AT 15 TO 25 MPH.
TONIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............7 TO 9 FEET.
EAST FACING REEFS............9 TO 12 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............5 TO 7 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 8 FEET.
PRIMARY PERIOD...............14 TO 15 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 5 FEET.
SECONDARY PERIOD.............9 SECONDS.
WINDS...............BREEZY. WEST AT 15 TO 25 MPH.
MONDAY
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............7 TO 9 FEET.
EAST FACING REEFS............9 TO 12 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............6 TO 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 8 FEET.
PRIMARY PERIOD...............14 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 6 FEET.
SECONDARY PERIOD.............9 SECONDS.
MAX HEAT INDEX.........AROUND 103.
WINDS...............WINDY. WEST AT 20 TO 30 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.4 FEET AT 9:13 AM SUNDAY
LOW TIDE 0.4 FEET AT 3:59 PM SUNDAY
HIGH TIDE 2.6 FEET AT 10:35 PM SUNDAY
LOW TIDE 1.2 FEET AT 4:45 AM MONDAY
HIGH TIDE 2.3 FEET AT 10:06 AM MONDAY
LOW TIDE 0.6 FEET AT 4:34 PM MONDAY
AT ROTA ISLAND...
HIGH TIDE 2.3 FEET AT 9:10 AM SUNDAY
LOW TIDE 0.4 FEET AT 3:53 PM SUNDAY
HIGH TIDE 2.4 FEET AT 10:32 PM SUNDAY
LOW TIDE 1.1 FEET AT 4:39 AM MONDAY
HIGH TIDE 2.2 FEET AT 10:03 AM MONDAY
LOW TIDE 0.6 FEET AT 4:28 PM MONDAY
AT TINIAN ISLAND...
HIGH TIDE 1.8 FEET AT 9:11 AM SUNDAY
LOW TIDE 0.1 FEET AT 3:36 PM SUNDAY
HIGH TIDE 1.9 FEET AT 10:33 PM SUNDAY
LOW TIDE 0.4 FEET AT 4:22 AM MONDAY
HIGH TIDE 1.7 FEET AT 10:04 AM MONDAY
LOW TIDE 0.2 FEET AT 4:11 PM MONDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 1.9 FEET AT 9:16 AM SUNDAY
LOW TIDE 0.1 FEET AT 4:06 PM SUNDAY
HIGH TIDE 2.2 FEET AT 11:04 PM SUNDAY
LOW TIDE 1.0 FEET AT 5:02 AM MONDAY
HIGH TIDE 1.8 FEET AT 10:13 AM MONDAY
LOW TIDE 0.3 FEET AT 4:40 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.
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