624
FZPQ50 PGUM 150733
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
533 PM ChST Wed Oct 15 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs of the Marianas over the next few days.
Surf is expected to diminish along all reefs once Invest 96W moves
out of the region and distant extratropical cyclone Nakri, moves
further away from the western Pacific. A moderate risk of
lightning is expected the next few days.

$$

GUZ001-MPZ001>003-152300-
Guam-Rota-Tinian-Saipan-
533 PM ChST Wed Oct 15 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 4 to 6 feet.
      Primary period...............11 seconds.
      Secondary swell..............East at 2 to 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at 10 to 20 mph.

.THURSDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 4 to 5 feet.
      Primary period...............12 seconds.
      Secondary swell..............East at 1 to 3 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 101.
Winds...............East at 10 to 20 mph.

.THURSDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 4 to 5 feet.
      Primary period...............12 seconds.
      Secondary swell..............East at 1 to 2 feet.
      Secondary period.............8 seconds.
Winds...............East at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.4 feet at 10:11 PM Wednesday
High tide  1.8 feet at  2:30 AM Thursday
Low  tide  0.1 feet at  9:48 AM Thursday
High tide  2.2 feet at  5:11 PM Thursday
Low  tide  1.1 feet at 11:05 PM Thursday
High tide  1.8 feet at  4:04 AM Friday

At Rota Island...
Low  tide  1.3 feet at 10:05 PM Wednesday
High tide  1.7 feet at  2:27 AM Thursday
Low  tide  0.1 feet at  9:42 AM Thursday
High tide  2.1 feet at  5:08 PM Thursday
Low  tide  1.1 feet at 10:59 PM Thursday
High tide  1.7 feet at  4:01 AM Friday

At Tinian Island...
Low  tide  1.1 feet at  9:17 PM Wednesday
High tide  1.4 feet at  1:20 AM Thursday
Low  tide -0.2 feet at  9:14 AM Thursday
High tide  1.5 feet at  4:39 PM Thursday
Low  tide  0.9 feet at 10:15 PM Thursday
High tide  1.3 feet at  2:48 AM Friday

At Tanapag Harbor, Saipan...
Low  tide  1.4 feet at 10:23 PM Wednesday
High tide  1.7 feet at  2:30 AM Thursday
Low  tide  0.1 feet at  9:55 AM Thursday
High tide  2.2 feet at  5:17 PM Thursday
Low  tide  1.1 feet at 11:07 PM Thursday
High tide  1.7 feet at  4:16 AM 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.

$$