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FZPQ50 PGUM 271800
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 AM ChST Thu Aug 28 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs of the Marianas for at least the next few days.
There will also be a moderate risk of lightning.

$$

GUZ001-MPZ001>003-280900-
Guam-Rota-Tinian-Saipan-
400 AM ChST Thu Aug 28 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 101.
Winds...............Southeast at around 10 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 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.
Winds...............East at 10 to 15 mph.

.FRIDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............2 to 4 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.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.7 feet at  4:44 AM Thursday
High tide  2.1 feet at 10:47 AM Thursday
Low  tide  1.1 feet at  4:41 PM Thursday
High tide  2.2 feet at 10:27 PM Thursday
Low  tide  0.6 feet at  5:23 AM Friday
High tide  2.0 feet at 11:49 AM Friday

At Rota Island...
Low  tide  0.7 feet at  4:38 AM Thursday
High tide  2.0 feet at 10:44 AM Thursday
Low  tide  1.1 feet at  4:35 PM Thursday
High tide  2.1 feet at 10:24 PM Thursday
Low  tide  0.6 feet at  5:17 AM Friday
High tide  1.9 feet at 11:46 AM Friday

At Tinian Island...
Low  tide  0.4 feet at  4:35 AM Thursday
High tide  1.3 feet at 10:43 AM Thursday
Low  tide  0.8 feet at  4:03 PM Thursday
High tide  1.5 feet at  9:52 PM Thursday
Low  tide  0.3 feet at  5:18 AM Friday
High tide  1.2 feet at 12:07 PM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.6 feet at  5:00 AM Thursday
High tide  1.7 feet at 11:10 AM Thursday
Low  tide  0.9 feet at  4:40 PM Thursday
High tide  1.9 feet at 10:51 PM Thursday
Low  tide  0.5 feet at  5:41 AM Friday
High tide  1.6 feet at 12:15 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.

$$