733
FZPQ50 PGUM 111758
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
358 AM ChST Tue Aug 12 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs today. The trade-wind swell will continue to
subside, allowing the surf to fall by another foot. This will
drop the rip current risk to low along all reefs. There will be
a moderate risk of lightning through Wednesday.

$$

GUZ001-MPZ001>003-120900-
Guam-Rota-Tinian-Saipan-
358 AM ChST Tue Aug 12 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 99.
Winds...............Southeast at around 10 mph.

.TONIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Winds...............Light and variable.

.WEDNESDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 102.
Winds...............Light and variable.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at  8:57 AM Tuesday
Low  tide  0.3 feet at  3:43 PM Tuesday
High tide  2.6 feet at 10:11 PM Tuesday
Low  tide  1.0 feet at  4:22 AM Wednesday
High tide  2.5 feet at  9:55 AM Wednesday
Low  tide  0.6 feet at  4:23 PM Wednesday

At Rota Island...
High tide  2.4 feet at  8:54 AM Tuesday
Low  tide  0.2 feet at  3:37 PM Tuesday
High tide  2.5 feet at 10:08 PM Tuesday
Low  tide  1.0 feet at  4:16 AM Wednesday
High tide  2.3 feet at  9:52 AM Wednesday
Low  tide  0.5 feet at  4:17 PM Wednesday

At Tinian Island...
High tide  1.6 feet at  8:11 AM Tuesday
Low  tide  0.1 feet at  3:12 PM Tuesday
High tide  1.7 feet at  9:48 PM Tuesday
Low  tide  0.7 feet at  3:59 AM Wednesday
High tide  1.5 feet at  9:19 AM Wednesday
Low  tide  0.3 feet at  3:49 PM Wednesday

At Tanapag Harbor, Saipan...
High tide  2.1 feet at  9:04 AM Tuesday
Low  tide  0.0 feet at  3:52 PM Tuesday
High tide  2.2 feet at 10:36 PM Tuesday
Low  tide  0.9 feet at  4:33 AM Wednesday
High tide  1.9 feet at 10:07 AM Wednesday
Low  tide  0.3 feet at  4:30 PM Wednesday

* 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.

$$