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FZPQ50 PGUM 201935
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
535 AM ChST Fri Nov 21 2025

.DISCUSSION...A high risk of rip currents along east facing reefs,
and a moderate risk of rip currents along north facing reefs, are
expected for at least the rest of the week as elevated trade swell
lingers.

$$

GUZ001-MPZ001>003-210800-
Guam-Rota-Tinian-Saipan-
535 AM ChST Fri Nov 21 2025

...HIGH RISK OF RIP CURRENTS THROUGH LATE MONDAY NIGHT ALONG EAST
FACING REEFS...

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

.TODAY...
Rip Current Risk.....High. Pounding surf will produce life
                     threatening rip currents at reefs and beaches.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............8 to 10 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 6 to 8 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 2 to 3 feet.
      Secondary period.............12 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 100.
Winds...............Windy. East at 20 to 30 mph.

.TONIGHT...
Rip Current Risk.....High *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............8 to 10 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 6 to 8 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 2 to 3 feet.
      Secondary period.............12 seconds.
Winds...............East at 15 to 20 mph with gusts to 30 mph
through the evening.

.SATURDAY...
Rip Current Risk.....High *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............8 to 10 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 6 to 8 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at 2 to 3 feet.
      Secondary period.............12 seconds.
Max Heat Index.........Around 100.
Winds...............East at 15 to 20 mph.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.1 feet at  9:11 AM Friday
Low  tide  1.4 feet at  2:26 PM Friday
High tide  2.0 feet at  7:04 PM Friday
Low  tide -0.5 feet at  2:25 AM Saturday
High tide  2.1 feet at  9:49 AM Saturday
Low  tide  1.5 feet at  3:04 PM Saturday

At Rota Island...
High tide  2.0 feet at  9:08 AM Friday
Low  tide  1.3 feet at  2:20 PM Friday
High tide  1.9 feet at  7:01 PM Friday
Low  tide -0.5 feet at  2:19 AM Saturday
High tide  1.9 feet at  9:46 AM Saturday
Low  tide  1.4 feet at  2:58 PM Saturday

At Tinian Island...
High tide  1.5 feet at  9:36 AM Friday
Low  tide  1.4 feet at  1:33 PM Friday
High tide  1.6 feet at  5:57 PM Friday
Low  tide -0.3 feet at  2:15 AM Saturday
High tide  1.6 feet at 10:28 AM Saturday
Low  tide  1.4 feet at  2:24 PM Saturday

At Tanapag Harbor, Saipan...
High tide  2.1 feet at  9:34 AM Friday
Low  tide  1.6 feet at  2:19 PM Friday
High tide  2.0 feet at  6:53 PM Friday
Low  tide -0.2 feet at  2:35 AM Saturday
High tide  2.1 feet at 10:16 AM Saturday
Low  tide  1.7 feet at  2:58 PM 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.

$$