117
FZPQ50 PGUM 021907
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
507 AM ChST Wed Sep 3 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs through tonight, which will then become low along
all reefs, possibly as soon as Thursday. There will be a moderate
risk of lightning through at least the weekend.

$$

GUZ001-MPZ001>003-031015-
Guam-Rota-Tinian-Saipan-
507 AM ChST Wed Sep 3 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 3 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 99.
Winds...............Southeast at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 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 3 to 4 feet.
      Primary period...............8 seconds.
Winds...............East at 10 to 15 mph.

.THURSDAY...
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 2 to 4 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 100.
Winds...............East at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.2 feet at 10:11 AM Wednesday
High tide  2.2 feet at  6:07 PM Wednesday
Low  tide  1.7 feet at 11:06 PM Wednesday
High tide  2.1 feet at  3:35 AM Thursday
Low  tide  0.1 feet at 11:06 AM Thursday
High tide  2.3 feet at  6:40 PM Thursday
Low  tide  1.6 feet at 11:49 PM Thursday

At Rota Island...
Low  tide  0.2 feet at 10:05 AM Wednesday
High tide  2.0 feet at  6:04 PM Wednesday
Low  tide  1.6 feet at 11:00 PM Wednesday
High tide  2.0 feet at  3:32 AM Thursday
Low  tide  0.1 feet at 11:00 AM Thursday
High tide  2.1 feet at  6:37 PM Thursday
Low  tide  1.5 feet at 11:43 PM Thursday

At Tinian Island...
Low  tide -0.1 feet at  9:54 AM Wednesday
High tide  1.4 feet at  6:08 PM Wednesday
Low  tide  1.3 feet at  9:54 PM Wednesday
High tide  1.5 feet at  2:18 AM Thursday
Low  tide -0.2 feet at 10:43 AM Thursday
High tide  1.5 feet at  6:35 PM Thursday
Low  tide  1.3 feet at 10:42 PM Thursday

At Tanapag Harbor, Saipan...
Low  tide  0.1 feet at 10:21 AM Wednesday
High tide  1.9 feet at  6:30 PM Wednesday
Low  tide  1.6 feet at 10:40 PM Wednesday
High tide  1.9 feet at  3:08 AM Thursday
Low  tide  0.0 feet at 11:10 AM Thursday
High tide  2.0 feet at  7:00 PM Thursday
Low  tide  1.6 feet at 11:28 PM Thursday

* 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.

$$