209
FZPQ50 PGUM 140620
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
420 PM ChST Thu Aug 14 2025

.DISCUSSION...The primary trade swell remains around 2 to 3 ft as
the trade winds remain light. The risk of rip currents remains low
along all reefs through Friday. As winds and trade swell build
slightly this weekend. The surf will build slightly along east
facing reefs and may cause the risk of rip currents to become
moderate.

$$

GUZ001-MPZ001>003-142100-
Guam-Rota-Tinian-Saipan-
420 PM ChST Thu Aug 14 2025

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

.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.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............Light and variable.

.FRIDAY...
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 100.
Winds...............Light and variable.

.FRIDAY NIGHT...
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.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.9 feet at  5:05 PM Thursday
High tide  2.6 feet at 11:11 PM Thursday
Low  tide  0.5 feet at  6:05 AM Friday
High tide  2.2 feet at 12:23 PM Friday
Low  tide  1.3 feet at  5:53 PM Friday
High tide  2.6 feet at 11:46 PM Friday

At Rota Island...
Low  tide  0.9 feet at  4:59 PM Thursday
High tide  2.5 feet at 11:08 PM Thursday
Low  tide  0.5 feet at  5:59 AM Friday
High tide  2.0 feet at 12:20 PM Friday
Low  tide  1.2 feet at  5:47 PM Friday
High tide  2.4 feet at 11:43 PM Friday

At Tinian Island...
Low  tide  0.6 feet at  4:27 PM Thursday
High tide  1.7 feet at 10:38 PM Thursday
Low  tide  0.2 feet at  5:53 AM Friday
High tide  1.3 feet at 12:18 PM Friday
Low  tide  0.9 feet at  5:09 PM Friday
High tide  1.8 feet at 11:10 PM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.7 feet at  5:11 PM Thursday
High tide  2.2 feet at 11:27 PM Thursday
Low  tide  0.3 feet at  6:20 AM Friday
High tide  1.8 feet at 12:45 PM Friday
Low  tide  1.0 feet at  5:57 PM Friday
High tide  2.2 feet at 11:56 PM 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.

$$