981
FZPQ50 PGUM 101858
SRFGUM

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

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs of the Marianas through Friday. A moderate
risk of lightning will begin around Tuesday.

$$

GUZ001-MPZ001>003-111000-
Guam-Rota-Tinian-Saipan-
458 AM ChST Sat Oct 11 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 2 to 4 feet.
      Primary period...............9 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 102.
Winds...............East at around 10 mph.

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

.SUNDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................North at 1 to 4 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 103.
Winds...............Northeast at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.3 feet at 11:30 AM Saturday
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...
High tide  2.2 feet at 11:27 AM Saturday
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...
High tide  1.6 feet at 11:44 AM Saturday
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...
High tide  2.3 feet at 12:02 PM Saturday
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.

$$