621
FZPQ50 PGUM 220600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Fri Aug 22 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 may 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>003-222045-
Guam-Rota-Tinian-Saipan-
400 PM ChST Fri Aug 22 2025

36 hour Surf Zone Forecast for the Marianas from 600 PM Friday
through 600 AM Sunday

.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 2 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at around 10 mph.

.SATURDAY...
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 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 101.
Winds...............East at around 10 mph.

.SATURDAY NIGHT...
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 2 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  8:12 PM Friday
Low  tide  1.4 feet at  1:39 AM Saturday
High tide  2.5 feet at  6:48 AM Saturday
Low  tide -0.1 feet at  1:54 PM Saturday
High tide  2.5 feet at  8:40 PM Saturday
Low  tide  1.3 feet at  2:19 AM Sunday

At Rota Island...
High tide  2.3 feet at  8:09 PM Friday
Low  tide  1.4 feet at  1:33 AM Saturday
High tide  2.4 feet at  6:45 AM Saturday
Low  tide -0.1 feet at  1:48 PM Saturday
High tide  2.3 feet at  8:37 PM Saturday
Low  tide  1.2 feet at  2:13 AM Sunday

At Tinian Island...
High tide  1.6 feet at  7:56 PM Friday
Low  tide  1.1 feet at 12:49 AM Saturday
High tide  1.8 feet at  5:50 AM Saturday
Low  tide -0.2 feet at  1:24 PM Saturday
High tide  1.6 feet at  8:21 PM Saturday
Low  tide  1.0 feet at  1:40 AM Sunday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at  8:28 PM Friday
Low  tide  1.3 feet at  1:46 AM Saturday
High tide  2.1 feet at  6:52 AM Saturday
Low  tide -0.2 feet at  2:03 PM Saturday
High tide  2.2 feet at  8:58 PM Saturday
Low  tide  1.2 feet at  2:31 AM Sunday

* 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.

$$