858
FZPQ50 PGUM 071859
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
459 AM ChST Wed Oct 8 2025

.DISCUSSION...There will be a moderate risk of rip currents along
east facing reefs today which become low along all reefs tonight. A
north swell will give us a renewed moderate risk for the weekend.
There will also be a moderate risk of lightning starting Friday.

$$

GUZ001-MPZ001>003-081000-
Guam-Rota-Tinian-Saipan-
459 AM ChST Wed Oct 8 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............Around 1 foot.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 101.
Winds...............South at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Southeast at 3 to 4 feet.
      Primary period...............8 seconds.
Winds...............Light and variable becoming northeast around
10 mph
                    after midnight.

.THURSDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 101.
Winds...............Northeast at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at  8:18 AM Wednesday
Low  tide  0.8 feet at  2:13 PM Wednesday
High tide  2.6 feet at  7:51 PM Wednesday
Low  tide -0.3 feet at  2:38 AM Thursday
High tide  2.5 feet at  9:16 AM Thursday
Low  tide  1.1 feet at  2:59 PM Thursday
High tide  2.5 feet at  8:21 PM Thursday

At Rota Island...
High tide  2.4 feet at  8:15 AM Wednesday
Low  tide  0.8 feet at  2:07 PM Wednesday
High tide  2.4 feet at  7:48 PM Wednesday
Low  tide -0.2 feet at  2:32 AM Thursday
High tide  2.4 feet at  9:13 AM Thursday
Low  tide  1.0 feet at  2:53 PM Thursday
High tide  2.4 feet at  8:18 PM Thursday

At Tinian Island...
High tide  1.5 feet at  7:54 AM Wednesday
Low  tide  0.7 feet at  1:30 PM Wednesday
High tide  1.7 feet at  7:07 PM Wednesday
Low  tide -0.2 feet at  2:16 AM Thursday
High tide  1.6 feet at  9:04 AM Thursday
Low  tide  0.9 feet at  2:17 PM Thursday
High tide  1.8 feet at  7:36 PM Thursday

At Tanapag Harbor, Saipan...
High tide  2.3 feet at  8:35 AM Wednesday
Low  tide  0.8 feet at  2:23 PM Wednesday
High tide  2.2 feet at  7:58 PM Wednesday
Low  tide -0.2 feet at  2:44 AM Thursday
High tide  2.3 feet at  9:37 AM Thursday
Low  tide  1.1 feet at  3:09 PM Thursday
High tide  2.2 feet at  8:25 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.

$$