323
FZPQ50 PGUM 090537
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
337 PM 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 AT
LEAST MIDWEEK, AS WESTERLY, NORTHWESTERLY AND NORTHEASTERLY SWELLS
CONTINUE TO MIX IN THE REGION. A MODERATE RISK OF LIGHTNING IS
EXPECTED IN THE FIRST HALF OF THE WEEK, MAINLY FOR TINIAN AND SAIPAN.
GUZ001-MPZ001>003-092000-
GUAM-ROTA-TINIAN-SAIPAN-
337 PM CHST SUN AUG 9 2026
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST THURSDAY
ALONG WEST AND NORTH FACING REEFS...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THURSDAY
AFTERNOON ALONG WEST AND NORTH FACING REEFS...
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM SUNDAY
THROUGH 600 AM MONDAY
TONIGHT
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE
THREATENING RIP CURRENTS AT REEFS AND BEACHES.
SURF HEIGHT
NORTH FACING REEFS............8 TO 11 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............9 TO 11 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 6 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 2 FEET.
TERTIARY PERIOD..............12 SECONDS.
WINDS...............SOUTHWEST AT 15 TO 25 MPH.
MONDAY
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE
THREATENING RIP CURRENTS AT REEFS AND BEACHES.
SURF HEIGHT
NORTH FACING REEFS............8 TO 11 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............9 TO 11 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 6 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 2 FEET.
TERTIARY PERIOD..............12 SECONDS.
MAX HEAT INDEX.........AROUND 104.
WINDS...............BREEZY. WEST AT 20 TO 25 MPH.
MONDAY NIGHT
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE
THREATENING RIP CURRENTS AT REEFS AND BEACHES.
SURF HEIGHT
NORTH FACING REEFS............8 TO 11 FEET.
EAST FACING REEFS............5 TO 7 FEET.
SOUTH FACING REEFS............3 TO 5 FEET.
WEST FACING REEFS............9 TO 11 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT 6 TO 8 FEET.
PRIMARY PERIOD...............10 SECONDS.
SECONDARY SWELL..............NORTHWEST AT AROUND 3 FEET.
SECONDARY PERIOD.............11 SECONDS.
TERTIARY SWELL...............NORTHEAST AT AROUND 2 FEET.
TERTIARY PERIOD..............12 SECONDS.
WINDS...............BREEZY. WEST AT 20 TO 25 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
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
LOW TIDE 1.8 FEET AT 11:59 PM MONDAY
HIGH TIDE 2.7 FEET AT 4:57 AM TUESDAY
AT ROTA ISLAND...
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
LOW TIDE 1.7 FEET AT 11:53 PM MONDAY
HIGH TIDE 2.5 FEET AT 4:54 AM TUESDAY
AT TINIAN ISLAND...
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
LOW TIDE 0.6 FEET AT 11:36 PM MONDAY
HIGH TIDE 2.0 FEET AT 4:55 AM TUESDAY
AT TANAPAG HARBOR, SAIPAN...
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 TIDE 1.7 FEET AT 11:43 PM MONDAY
HIGH TIDE 2.3 FEET AT 4:46 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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