517
FZPQ50 PGUM 110600
SRFGUM

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

.DISCUSSION...There is a moderate risk of rip currents along
north and east facing reefs. A stronger swell pulse is expected
to move through the region around Saturday, the surf is expected
to rise by a foot or two, maybe even 3 feet in some areas. This
pulse may warrant a High Surf Advisory (HSA) and elevate the
risk of rip currents to high (HRRC).

$$

GUZ001-MPZ001>003-112100-
Guam-Rota-Tinian-Saipan-
400 PM ChST Thu Dec 11 2025

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

.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.
      Secondary swell..............North at around 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........85 Degrees.
Winds...............East at 10 to 15 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.
      Secondary swell..............North at around 3 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 99.
Winds...............East at 15 to 20 mph.

.FRIDAY NIGHT...
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 5 to 7 feet.
      Primary period...............8 seconds.
Winds...............Northeast at 15 to 20 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
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
High tide  1.4 feet at  2:08 AM Saturday

At Rota Island...
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
High tide  1.3 feet at  2:05 AM Saturday

At Tinian Island...
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
High tide  1.0 feet at  2:06 AM Saturday

At Tanapag Harbor, Saipan...
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
High tide  1.4 feet at  2:29 AM Saturday

* 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.

$$