194
FZPQ50 PGUM 230600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Sat Aug 23 2025

.DISCUSSION...There is a low risk of rip currents for all reefs.
There is also a moderate risk of lightning through Tuesday. The
trade-wind swell should increase a bit causing the surf along east
facing reefs to cross the 5 foot threshold and bring the rip
risk up to moderate around the beginning of next week.

$$

GUZ001-MPZ001>003-232030-
Guam-Rota-Tinian-Saipan-
400 PM ChST Sat Aug 23 2025

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

.TONIGHT...
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.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at around 10 mph.

.SUNDAY...
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 100.
Winds...............East at 10 to 15 mph.

.SUNDAY NIGHT...
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.
Winds...............East at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.5 feet at  8:40 PM Saturday
Low  tide  1.3 feet at  2:19 AM Sunday
High tide  2.5 feet at  7:36 AM Sunday
Low  tide  0.1 feet at  2:32 PM Sunday
High tide  2.4 feet at  9:04 PM Sunday
Low  tide  1.1 feet at  2:57 AM Monday

At Rota Island...
High tide  2.3 feet at  8:37 PM Saturday
Low  tide  1.2 feet at  2:13 AM Sunday
High tide  2.4 feet at  7:33 AM Sunday
Low  tide  0.1 feet at  2:26 PM Sunday
High tide  2.3 feet at  9:01 PM Sunday
Low  tide  1.1 feet at  2:51 AM Monday

At Tinian Island...
High tide  1.6 feet at  8:21 PM Saturday
Low  tide  1.0 feet at  1:40 AM Sunday
High tide  1.7 feet at  6:44 AM Sunday
Low  tide  0.0 feet at  2:02 PM Sunday
High tide  1.6 feet at  8:43 PM Sunday
Low  tide  0.9 feet at  2:27 AM Monday


At Tanapag Harbor, Saipan...
High tide  2.2 feet at  8:58 PM Saturday
Low  tide  1.2 feet at  2:31 AM Sunday
High tide  2.1 feet at  7:45 AM Sunday
Low  tide  0.0 feet at  2:42 PM Sunday
High tide  2.1 feet at  9:25 PM Sunday
Low  tide  1.0 feet at  3:10 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.

$$