404
FZPQ50 PGUM 190758
SRFGUM
SURF ZONE FORECAST FOR THE MARIANA ISLANDS
NATIONAL WEATHER SERVICE TIYAN GU
558 PM CHST WED AUG 19 2026
DISCUSSION
THERE IS A MODERATE RISK OF RIP CURRENTS ALONG NORTH-
AND WEST-FACING REEFS AND A MODERATE RISK OF LIGHTNING THROUGH
THURSDAY NIGHT. DEPENDING ON THE TRACK OF TD 17W, A LONG-PERIOD,
EASTERLY SWELL WILL LIKELY APPROACH THE REGION LATER THIS WEEKEND.
THIS SITUATION WILL CONTINUE TO BE MONITORED CLOSELY.
GUZ001-MPZ001>003-192300-
GUAM-ROTA-TINIAN-SAIPAN-
558 PM CHST WED AUG 19 2026
36 HOUR SURF ZONE FORECAST FOR THE MARIANAS FROM 600 PM WEDNESDAY
THROUGH 600 AM FRIDAY
TONIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............1 TO 3 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................WEST AT AROUND 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............NORTHEAST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
WATER TEMPERATURE
IPAN BUOY.......... 84 DEGREES.
WINDS...............NORTHEAST AT 10 TO 15 MPH.
THURSDAY
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............2 TO 3 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............4 TO 6 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT AROUND 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
MAX HEAT INDEX.........AROUND 101.
WINDS...............NORTHEAST AT AROUND 10 MPH.
THURSDAY NIGHT
RIP CURRENT RISK.....MODERATE *.
SURF HEIGHT
NORTH FACING REEFS............3 TO 5 FEET.
EAST FACING REEFS............2 TO 4 FEET.
SOUTH FACING REEFS............2 TO 4 FEET.
WEST FACING REEFS............3 TO 5 FEET.
SWELL/PERIOD
PRIMARY SWELL................NORTHEAST AT AROUND 3 FEET.
PRIMARY PERIOD...............8 SECONDS.
SECONDARY SWELL..............WEST AT AROUND 3 FEET.
SECONDARY PERIOD.............8 SECONDS.
WINDS...............NORTHEAST AT 5 TO 10 MPH.
TIDE INFORMATION FOR THE NEXT 36 HOURS...
AT APRA HARBOR, GUAM...
LOW TIDE 1.5 FEET AT 6:14 PM WEDNESDAY
HIGH TIDE 2.2 FEET AT 11:48 PM WEDNESDAY
LOW TIDE 0.5 FEET AT 7:21 AM THURSDAY
HIGH TIDE 1.9 FEET AT 2:56 PM THURSDAY
LOW TIDE 1.7 FEET AT 7:14 PM THURSDAY
HIGH TIDE 2.1 FEET AT 12:24 AM FRIDAY
LOW TIDE 0.4 FEET AT 8:20 AM FRIDAY
AT ROTA ISLAND...
LOW TIDE 1.4 FEET AT 6:08 PM WEDNESDAY
HIGH TIDE 2.1 FEET AT 11:45 PM WEDNESDAY
LOW TIDE 0.4 FEET AT 7:15 AM THURSDAY
HIGH TIDE 1.8 FEET AT 2:53 PM THURSDAY
LOW TIDE 1.6 FEET AT 7:08 PM THURSDAY
HIGH TIDE 2.0 FEET AT 12:21 AM FRIDAY
LOW TIDE 0.4 FEET AT 8:14 AM FRIDAY
AT TINIAN ISLAND...
LOW TIDE 0.5 FEET AT 5:51 PM WEDNESDAY
HIGH TIDE 1.7 FEET AT 11:46 PM WEDNESDAY
LOW TIDE 0.2 FEET AT 6:58 AM THURSDAY
HIGH TIDE 1.4 FEET AT 2:54 PM THURSDAY
LOW TIDE 0.6 FEET AT 6:51 PM THURSDAY
HIGH TIDE 1.6 FEET AT 12:22 AM FRIDAY
LOW TIDE 0.1 FEET AT 7:57 AM FRIDAY
AT TANAPAG HARBOR, SAIPAN...
LOW TIDE 1.3 FEET AT 6:12 PM WEDNESDAY
HIGH TIDE 2.0 FEET AT 12:06 AM THURSDAY
LOW TIDE 0.3 FEET AT 7:43 AM THURSDAY
HIGH TIDE 1.6 FEET AT 3:26 PM THURSDAY
LOW TIDE 1.5 FEET AT 6:55 PM THURSDAY
HIGH TIDE 1.9 FEET AT 12:30 AM FRIDAY
LOW TIDE 0.3 FEET AT 8:41 AM FRIDAY
* 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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