031
FZPQ50 PGUM 241842
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
442 AM ChST Mon Aug 25 2025

.DISCUSSION...There will be a low risk of rip currents along all
reefs of the Marianas through Tuesday, then the risk along east
facing reefs could become moderate again. A moderate risk of
lightning will linger all week.

$$

GUZ001-MPZ001>003-250945-
Guam-Rota-Tinian-Saipan-
442 AM ChST Mon Aug 25 2025

36 hour Surf Zone Forecast for the Marianas from 600 AM Monday
through 600 PM Tuesday

.TODAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 4 feet.
      South facing reefs............1 to 3 foot.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 102.
Winds...............East at around 10 mph.

.TONIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 2 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 2 feet.
      Primary period...............8 seconds.
Winds...............Breezy. Northeast at 10 to 15 mph shifting
                    to the east 10 to 25 mph after midnight.

.TUESDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 101.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.4 feet at  8:21 AM Monday
Low  tide  0.4 feet at  3:05 PM Monday
High tide  2.4 feet at  9:26 PM Monday
Low  tide  1.0 feet at  3:33 AM Tuesday
High tide  2.3 feet at  9:06 AM Tuesday
Low  tide  0.6 feet at  3:37 PM Tuesday
High tide  2.4 feet at  9:46 PM Tuesday

At Rota Island...
High tide  2.3 feet at  8:18 AM Monday
Low  tide  0.3 feet at  2:59 PM Monday
High tide  2.3 feet at  9:23 PM Monday
Low  tide  0.9 feet at  3:27 AM Tuesday
High tide  2.2 feet at  9:03 AM Tuesday
Low  tide  0.6 feet at  3:31 PM Tuesday
High tide  2.2 feet at  9:43 PM Tuesday

At Tinian Island...
High tide  1.6 feet at  7:37 AM Monday
Low  tide  0.2 feet at  2:35 PM Monday
High tide  1.6 feet at  9:02 PM Monday
Low  tide  0.7 feet at  3:11 AM Tuesday
High tide  1.5 feet at  8:32 AM Tuesday
Low  tide  0.4 feet at  3:06 PM Tuesday
High tide  1.5 feet at  9:19 PM Tuesday

At Tanapag Harbor, Saipan...
High tide  2.0 feet at  8:34 AM Monday
Low  tide  0.2 feet at  3:16 PM Monday
High tide  2.1 feet at  9:50 PM Monday
Low  tide  0.9 feet at  3:46 AM Tuesday
High tide  1.9 feet at  9:22 AM Tuesday
Low  tide  0.4 feet at  3:46 PM Tuesday
High tide  2.0 feet at 10:12 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.

$$