558
FZPQ50 PGUM 121832
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
432 AM ChST Thu Nov 13 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs through at least the weekend. Surf along
east facing reefs could build another foot as the trade swell builds.

$$

GUZ001-MPZ001>003-130945-
Guam-Rota-Tinian-Saipan-
432 AM ChST Thu Nov 13 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............3 to 5 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................East at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............11 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 99.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............11 seconds.
Winds...............East at 10 to 15 mph.

.FRIDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 2 feet.
      Secondary period.............11 seconds.
Max Heat Index.........Around 100.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.0 feet at  8:02 AM Thursday
High tide  2.2 feet at  3:38 PM Thursday
Low  tide  1.1 feet at  9:50 PM Thursday
High tide  1.5 feet at  2:26 AM Friday
Low  tide  0.3 feet at  9:05 AM Friday
High tide  2.2 feet at  4:15 PM Friday
Low  tide  0.8 feet at 10:42 PM Friday

At Rota Island...
Low  tide  0.0 feet at  7:56 AM Thursday
High tide  2.0 feet at  3:35 PM Thursday
Low  tide  1.0 feet at  9:44 PM Thursday
High tide  1.5 feet at  2:23 AM Friday
Low  tide  0.3 feet at  8:59 AM Friday
High tide  2.0 feet at  4:12 PM Friday
Low  tide  0.7 feet at 10:36 PM Friday

At Tinian Island...
Low  tide -0.1 feet at  7:34 AM Thursday
High tide  1.6 feet at  3:08 PM Thursday
Low  tide  0.9 feet at  9:09 PM Thursday
High tide  1.2 feet at  1:18 AM Friday
Low  tide  0.1 feet at  8:27 AM Friday
High tide  1.6 feet at  3:36 PM Friday
Low  tide  0.6 feet at 10:03 PM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.2 feet at  8:11 AM Thursday
High tide  2.2 feet at  3:46 PM Thursday
Low  tide  1.1 feet at 10:08 PM Thursday
High tide  1.5 feet at  2:38 AM Friday
Low  tide  0.5 feet at  9:15 AM Friday
High tide  2.2 feet at  4:23 PM Friday
Low  tide  0.8 feet at 10:50 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.

$$