816
FZPQ50 PGUM 201901
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
501 AM CHST MON SEP 21 2026
DISCUSSION
A MODERATE RISK OF RIP CURRENTS WILL PERSIST ALONG WEST
AND SOUTH FACING REEFS THROUGH TUESDAY, AND ALONG NORTH AND EAST
FACING REEFS THROUGH FRIDAY. A MODERATE RISK OF LIGHTNING WILL EXIST
THROUGH FRIDAY NEAR GUAM AND ROTA, AND TODAY PLUS TUESDAY THROUGH
WEDNESDAY FOR TINIAN AND SAIPAN.
GUZ001-MPZ001>003-211015-
GUAM-ROTA-TINIAN-SAIPAN-
501 AM CHST MON SEP 21 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 AM MONDAY
THROUGH 600 PM TUESDAY
TODAY
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............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTH AT 2 TO 4 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHEAST AT 2 TO 4 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............SOUTHWEST AT 2 TO 3 FEET.
TERTIARY PERIOD..............10 SECONDS.
WATER TEMPERATURE
PAGO BUOY..........85 DEGREES.
MAX HEAT INDEX.........AROUND 104.
WINDS...............SOUTHEAST AT 10 TO 15 MPH.
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTH AT 2 TO 4 FEET.
PRIMARY PERIOD...............9 SECONDS.
SECONDARY SWELL..............NORTHEAST AT 2 TO 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............SOUTHWEST AT 2 TO 3 FEET.
TERTIARY PERIOD..............10 SECONDS.
WINDS...............SOUTH AT AROUND 10 MPH.
TUESDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............3 TO 5 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTH AT 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............10 SECONDS.
TERTIARY SWELL...............SOUTHWEST AT 2 TO 3 FEET.
TERTIARY PERIOD..............10 SECONDS.
MAX HEAT INDEX.........AROUND 102.
WINDS...............SOUTHEAST AT 10 TO 15 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 0.3 FEET AT 9:34 AM MONDAY
HIGH TIDE 2.1 FEET AT 5:29 PM MONDAY
LOW TIDE 1.5 FEET AT 10:50 PM MONDAY
HIGH TIDE 1.9 FEET AT 3:13 AM TUESDAY
LOW TIDE 0.2 FEET AT 10:31 AM TUESDAY
HIGH TIDE 2.1 FEET AT 6:00 PM TUESDAY
LOW TIDE 1.4 FEET AT 11:28 PM TUESDAY
AT ROTA ISLAND...
LOW TIDE 0.3 FEET AT 9:28 AM MONDAY
HIGH TIDE 1.9 FEET AT 5:26 PM MONDAY
LOW TIDE 1.4 FEET AT 10:44 PM MONDAY
HIGH TIDE 1.8 FEET AT 3:10 AM TUESDAY
LOW TIDE 0.2 FEET AT 10:25 AM TUESDAY
HIGH TIDE 2.0 FEET AT 5:57 PM TUESDAY
LOW TIDE 1.3 FEET AT 11:22 PM TUESDAY
AT TINIAN ISLAND...
LOW TIDE 0.1 FEET AT 9:11 AM MONDAY
HIGH TIDE 1.5 FEET AT 5:27 PM MONDAY
LOW TIDE 0.5 FEET AT 10:27 PM MONDAY
HIGH TIDE 1.4 FEET AT 3:11 AM TUESDAY
LOW TIDE 0.1 FEET AT 10:08 AM TUESDAY
HIGH TIDE 1.6 FEET AT 5:58 PM TUESDAY
LOW TIDE 0.5 FEET AT 11:05 PM TUESDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 0.3 FEET AT 9:47 AM MONDAY
HIGH TIDE 1.9 FEET AT 5:50 PM MONDAY
LOW TIDE 1.5 FEET AT 10:41 PM MONDAY
HIGH TIDE 1.7 FEET AT 2:52 AM TUESDAY
LOW TIDE 0.2 FEET AT 10:37 AM TUESDAY
HIGH TIDE 1.9 FEET AT 6:15 PM TUESDAY
LOW TIDE 1.4 FEET AT 11:15 PM 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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