019
FZPQ50 PGUM 110657
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
457 PM ChST Sat Oct 11 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north, east, and west facing reefs of the Marianas through at least
Sunday night. A long-period north swell emanating from distant
tropical systems is generating elevated surf along north facing
reefs, and wrapping around the islands to increase surf along east
and west facing reefs as well. Exercise caution, as narrow reefs and
channels may see strong rip currents develop. The north swell and
associated surf will gradually diminish over the next few days.


$$

GUZ001-MPZ001>003-112200-
Guam-Rota-Tinian-Saipan-
457 PM ChST Sat Oct 11 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............6 to 8 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............5 to 7 feet.
Swell/Period
      Primary swell................North at 4 to 5 feet.
      Primary period...............14 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........87 Degrees.
Winds...............Northeast at around 10 mph.

.SUNDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................North at 3 to 4 feet.
      Primary period...............13 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.

.SUNDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................North at 3 to 4 feet.
      Primary period...............12 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.6 feet at  4:44 PM Saturday
High tide  2.4 feet at  9:33 PM Saturday
Low  tide -0.5 feet at  5:10 AM Sunday
High tide  2.2 feet at 12:54 PM Sunday
Low  tide  1.7 feet at  5:53 PM Sunday
High tide  2.2 feet at 10:18 PM Sunday

At Rota Island...
Low  tide  1.5 feet at  4:38 PM Saturday
High tide  2.2 feet at  9:30 PM Saturday
Low  tide -0.5 feet at  5:04 AM Sunday
High tide  2.1 feet at 12:51 PM Sunday
Low  tide  1.6 feet at  5:47 PM Sunday
High tide  2.1 feet at 10:15 PM Sunday

At Tinian Island...
Low  tide  1.3 feet at  4:06 PM Saturday
High tide  1.8 feet at  8:48 PM Saturday
Low  tide -0.5 feet at  4:58 AM Sunday
High tide  1.6 feet at  1:09 PM Sunday
Low  tide  1.4 feet at  5:14 PM Sunday
High tide  1.7 feet at  9:35 PM Sunday

At Tanapag Harbor, Saipan...
Low  tide  1.6 feet at  4:56 PM Saturday
High tide  2.1 feet at  9:29 PM Saturday
Low  tide -0.4 feet at  5:18 AM Sunday
High tide  2.2 feet at  1:17 PM Sunday
Low  tide  1.7 feet at  6:14 PM Sunday
High tide  2.0 feet at 10:12 PM Sunday

* 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.

$$