602
FZPQ50 PGUM 101833
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
433 AM ChST Thu Dec 11 2025

.DISCUSSION... There will be a moderate risk of rip currents along
north and east facing reefs the next few days, which could become
high over the weekend with the near approach of a shear line.

$$

GUZ001-MPZ001>003-110945-
Guam-Rota-Tinian-Saipan-
433 AM ChST Thu Dec 11 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............6 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 4 feet.
      Secondary period.............10 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Max Heat Index.........Around 97.
Winds...............East at 10 to 20 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 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...............8 seconds.
Winds...............East at 10 to 20 mph.

.FRIDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............6 to 8 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...............8 seconds.
Max Heat Index.........Around 99.
Winds...............East at 10 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.1 feet at  6:20 AM Thursday
High tide  2.1 feet at  1:52 PM Thursday
Low  tide  1.1 feet at  8:00 PM Thursday
High tide  1.5 feet at 12:19 AM Friday
Low  tide  0.2 feet at  7:11 AM Friday
High tide  2.1 feet at  2:30 PM Friday
Low  tide  0.8 feet at  9:08 PM Friday

At Rota Island...
Low  tide -0.1 feet at  6:14 AM Thursday
High tide  2.0 feet at  1:49 PM Thursday
Low  tide  1.0 feet at  7:54 PM Thursday
High tide  1.4 feet at 12:16 AM Friday
Low  tide  0.2 feet at  7:05 AM Friday
High tide  2.0 feet at  2:27 PM Friday
Low  tide  0.8 feet at  9:02 PM Friday

At Tinian Island...
Low  tide  0.0 feet at  5:57 AM Thursday
High tide  1.6 feet at  1:50 PM Thursday
Low  tide  0.4 feet at  7:37 PM Thursday
High tide  1.1 feet at 12:17 AM Friday
Low  tide  0.1 feet at  6:48 AM Friday
High tide  1.5 feet at  2:28 PM Friday
Low  tide  0.3 feet at  8:45 PM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.1 feet at  6:29 AM Thursday
High tide  2.2 feet at  1:59 PM Thursday
Low  tide  1.2 feet at  8:29 PM Thursday
High tide  1.5 feet at 12:42 AM Friday
Low  tide  0.4 feet at  7:22 AM Friday
High tide  2.1 feet at  2:37 PM Friday
Low  tide  0.9 feet at  9:32 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.

$$