505
FZPQ50 PGUM 120738
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
538 PM CHST SUN JUL 12 2026
DISCUSSION
A MODERATE RISK OF RIP CURRENTS AND FOR LIGHTNING REMAINS IN EFFECT
FOR ALL REEFS FOR THE WHOLE FORECAST PERIOD. DOMINANT SWELLS ARE A
DIMINISHING WESTERLY FROM TYPHOON BAVI AND THE TYPICAL TRADE-WIND
SWELL.
GUZ001-MPZ001>003-122245-
GUAM-ROTA-TINIAN-SAIPAN-
538 PM CHST SUN JUL 12 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM SUNDAY
THROUGH 600 AM TUESDAY
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 7 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............6 TO 8 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 5 FEET.
PRIMARY PERIOD...............11 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 4 FEET.
SECONDARY PERIOD.............8 SECONDS.
WATER TEMPERATURE
TANAPAG BUOY.......... 82 DEGREES.
WINDS...............EAST AT 10 TO 15 MPH.
MONDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............5 TO 7 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 4 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
TERTIARY SWELL...............SOUTH AT AROUND 2 FEET.
TERTIARY PERIOD..............8 SECONDS.
MAX HEAT INDEX.........AROUND 99.
WINDS...............SOUTHEAST AT AROUND 10 MPH.
MONDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............4 TO 6 FEET.
EAST FACING REEFS............4 TO 6 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 3 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............EAST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
TERTIARY SWELL...............SOUTH AT AROUND 3 FEET.
TERTIARY PERIOD..............8 SECONDS.
WINDS...............SOUTH AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.6 FEET AT 7:22 PM SUNDAY
LOW TIDE 2.0 FEET AT 11:58 PM SUNDAY
HIGH TIDE 2.8 FEET AT 4:59 AM MONDAY
LOW TIDE -0.6 FEET AT 12:39 PM MONDAY
HIGH TIDE 2.7 FEET AT 8:12 PM MONDAY
LOW TIDE 2.0 FEET AT 1:02 AM TUESDAY
HIGH TIDE 2.8 FEET AT 5:58 AM TUESDAY
AT ROTA ISLAND...
HIGH TIDE 2.4 FEET AT 7:19 PM SUNDAY
LOW TIDE 1.9 FEET AT 11:52 PM SUNDAY
HIGH TIDE 2.6 FEET AT 4:56 AM MONDAY
LOW TIDE -0.5 FEET AT 12:33 PM MONDAY
HIGH TIDE 2.5 FEET AT 8:09 PM MONDAY
LOW TIDE 1.8 FEET AT 12:56 AM TUESDAY
HIGH TIDE 2.7 FEET AT 5:55 AM TUESDAY
AT TINIAN ISLAND...
HIGH TIDE 1.9 FEET AT 7:20 PM SUNDAY
LOW TIDE 0.7 FEET AT 11:35 PM SUNDAY
HIGH TIDE 2.0 FEET AT 4:57 AM MONDAY
LOW TIDE -0.2 FEET AT 12:16 PM MONDAY
HIGH TIDE 2.0 FEET AT 8:10 PM MONDAY
LOW TIDE 0.6 FEET AT 12:39 AM TUESDAY
HIGH TIDE 2.1 FEET AT 5:56 AM TUESDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.2 FEET AT 7:50 PM SUNDAY
LOW TIDE 1.9 FEET AT 11:38 PM SUNDAY
HIGH TIDE 2.4 FEET AT 4:39 AM MONDAY
LOW TIDE -0.8 FEET AT 12:41 PM MONDAY
HIGH TIDE 2.3 FEET AT 8:39 PM MONDAY
LOW TIDE 1.9 FEET AT 12:56 AM TUESDAY
HIGH TIDE 2.4 FEET AT 5:40 AM TUESDAY
* 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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