803
FZPQ50 PGUM 061814
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
414 AM ChST Thu Aug 7 2025

.DISCUSSION...A low risk of rip currents will continue along all
reefs of the Marianas through the end of the week. A slight
increase in trade swell late in the weekend may increase surf
along east facing reefs by a foot or so, increasing the risk of
rip currents there to moderate. There is a moderate risk of
lightning through tonight.

$$

GUZ001-MPZ001>003-071000-
Guam-Rota-Tinian-Saipan-
414 AM ChST Thu Aug 7 2025

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

.TODAY...
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............1 to 2 feet.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 100.
Winds...............Light and variable.

.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.

.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 becoming east
around 10 mph in the afternoon.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.1 feet at 12:25 PM Thursday
High tide  2.4 feet at  7:54 PM Thursday
Low  tide  1.8 feet at 12:54 AM Friday
High tide  2.4 feet at  5:46 AM Friday
Low  tide -0.2 feet at  1:07 PM Friday
High tide  2.5 feet at  8:24 PM Friday

At Rota Island...
Low  tide -0.1 feet at 12:19 PM Thursday
High tide  2.2 feet at  7:51 PM Thursday
Low  tide  1.7 feet at 12:48 AM Friday
High tide  2.3 feet at  5:43 AM Friday
Low  tide -0.1 feet at  1:01 PM Friday
High tide  2.3 feet at  8:21 PM Friday

At Tinian Island...
Low  tide -0.2 feet at 12:03 PM Thursday
High tide  1.6 feet at  7:59 PM Thursday
Low  tide  1.4 feet at 11:42 PM Thursday
High tide  1.8 feet at  4:35 AM Friday
Low  tide -0.3 feet at 12:44 PM Friday
High tide  1.6 feet at  8:24 PM Friday

At Tanapag Harbor, Saipan...
Low  tide -0.2 feet at 12:29 PM Thursday
High tide  2.0 feet at  8:25 PM Thursday
Low  tide  1.7 feet at 12:31 AM Friday
High tide  2.1 feet at  5:28 AM Friday
Low  tide -0.3 feet at  1:14 PM Friday
High tide  2.1 feet at  8:53 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.

$$