861
FZPQ50 PGUM 210701
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
501 PM CHST SAT MAR 21 2026
DISCUSSION
ELEVATED NORTHEAST TO EAST SWELL, REINFORCED BY
DIMINISHING LONG-PERIOD NORTH TO NORTHEAST SWELL WILL CONTINUE TO
PRODUCE HAZARDOUS SURF ALONG NORTH FACING REEFS, AND A HIGH RISK OF
RIP CURRENTS ALONG NORTH AND EAST FACING REEFS THROUGH AT LEAST
SUNDAY AFTERNOON. SWELLS, SURF, AND RIP CURRENT RISK WILL THEN
BRIEFLY DIMINISH, ALTHOUGH AN INCREASE IN NORTHEAST TO EAST TRADE-
WIND SWELL MAY INCREASE THE RIP RISK ALONG EAST-FACING REEFS BACK UP
TO HIGH AROUND MONDAY NIGHT. A MODERATE RISK OF RIP CURRENTS WILL
CONTINUE ALONG WEST AND SOUTH FACING REEFS THROUGH TONIGHT, BEFORE
RIP RISK ALONG WEST REEFS DECREASES TO LOW FOR SUNDAY. THERE IS A
MODERATE RISK OF LIGHTNING FOR GUAM AND ROTA MONDAY AND MONDAY NIGHT.
GUZ001-MPZ001>003-212300-
GUAM-ROTA-TINIAN-SAIPAN-
501 PM CHST SAT MAR 21 2026
...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST SUNDAY ALONG NORTH
FACING REEFS...
...HIGH RISK OF RIP CURRENTS THROUGH SUNDAY AFTERNOON ALONG NORTH
AND EAST FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM SATURDAY
THROUGH 600 AM MONDAY
TONIGHT
RIP CURRENT RISK.....HIGH *.
SURF HEIGHT
NORTH FACING REEFS............7 TO 10 FEET.
EAST FACING REEFS............7 TO 9 FEET.
SOUTH FACING REEFS............4 TO 5 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 7 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTH AT 3 TO 5 FEET.
SECONDARY PERIOD.............13 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 3 FEET.
TERTIARY PERIOD..............14 SECONDS.
WATER TEMPERATURE
IPAN BUOY..........81 DEGREES.
WINDS...............NORTHEAST AT 10 TO 20 MPH WITH GUSTS TO 25 MPH.
SUNDAY
RIP CURRENT RISK.....HIGH *.
NORTH FACING REEFS............6 TO 9 FEET.
EAST FACING REEFS............6 TO 9 FEET.
SOUTH FACING REEFS............4 TO 6 FEET.
WEST FACING REEFS............3 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 8 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............14 SECONDS.
TERTIARY SWELL...............NORTH AT AROUND 3 FEET.
TERTIARY PERIOD..............12 SECONDS.
MAX HEAT INDEX.........AROUND 92.
WINDS...............BREEZY. NORTHEAST AT 15 TO 25 MPH.
SUNDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............5 TO 8 FEET.
EAST FACING REEFS............6 TO 8 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............2 TO 4 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT 5 TO 7 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............12 SECONDS.
TERTIARY SWELL...............NORTH AT 1 TO 2 FEET.
TERTIARY PERIOD..............11 SECONDS.
WINDS...............NORTHEAST AT 15 TO 20 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
HIGH TIDE 2.3 FEET AT 9:45 PM SATURDAY
LOW TIDE 0.9 FEET AT 3:37 AM SUNDAY
HIGH TIDE 2.4 FEET AT 9:12 AM SUNDAY
LOW TIDE -0.2 FEET AT 4:07 PM SUNDAY
HIGH TIDE 2.3 FEET AT 10:48 PM SUNDAY
LOW TIDE 1.2 FEET AT 4:22 AM MONDAY
AT ROTA ISLAND...
HIGH TIDE 2.2 FEET AT 9:42 PM SATURDAY
LOW TIDE 0.9 FEET AT 3:31 AM SUNDAY
HIGH TIDE 2.3 FEET AT 9:09 AM SUNDAY
LOW TIDE -0.2 FEET AT 4:01 PM SUNDAY
HIGH TIDE 2.1 FEET AT 10:45 PM SUNDAY
LOW TIDE 1.1 FEET AT 4:16 AM MONDAY
AT TINIAN ISLAND...
HIGH TIDE 1.7 FEET AT 9:43 PM SATURDAY
LOW TIDE 0.3 FEET AT 3:14 AM SUNDAY
HIGH TIDE 1.8 FEET AT 9:10 AM SUNDAY
LOW TIDE -0.1 FEET AT 3:44 PM SUNDAY
HIGH TIDE 1.7 FEET AT 10:46 PM SUNDAY
LOW TIDE 0.4 FEET AT 3:59 AM MONDAY
AT TANAPAG HARBOR, SAIPAN...
HIGH TIDE 2.1 FEET AT 10:05 PM SATURDAY
LOW TIDE 1.0 FEET AT 3:39 AM SUNDAY
HIGH TIDE 2.1 FEET AT 9:09 AM SUNDAY
LOW TIDE -0.1 FEET AT 4:08 PM SUNDAY
HIGH TIDE 2.1 FEET AT 11:18 PM SUNDAY
LOW TIDE 1.3 FEET AT 4:24 AM 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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