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FZPQ50 PGUM 031854
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
454 AM ChST Mon Aug 4 2025

.DISCUSSION...A moderate risk of rip currents is expected along east
facing reefs of the Marianas through Monday night. The surf is
expected to diminish to below 5 feet by Tuesday, this will cause the
risk of rip currents to drop to low. Surf may rise by the weekend
along east facing reefs as the trade-wind swell builds.

GUZ001-MPZ001>003-041000-
Guam-Rota-Tinian-Saipan-
454 AM ChST Mon Aug 4 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............9 seconds.
Water Temperature
      Ritidian buoy.......... 86 Degrees.
Max Heat Index.........Around 101.
Winds...............East at 10 to 15 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................Northeast at 3 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............9 seconds.
Winds...............Southeast at around 10 mph.

.TUESDAY...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............8 seconds.
Max Heat Index.........Around 100.
Winds...............East at around 10 mph in the morning
                    becoming light.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.3 feet at  9:56 AM Monday
High tide  2.1 feet at  6:01 PM Monday
Low  tide  1.9 feet at 10:14 PM Monday
High tide  2.2 feet at  2:54 AM Tuesday
Low  tide  0.2 feet at 10:49 AM Tuesday
High tide  2.2 feet at  6:46 PM Tuesday

At Rota Island...
Low  tide  0.3 feet at  9:50 AM Monday
High tide  2.0 feet at  5:58 PM Monday
Low  tide  1.7 feet at 10:08 PM Monday
High tide  2.1 feet at  2:51 AM Tuesday
Low  tide  0.2 feet at 10:43 AM Tuesday
High tide  2.1 feet at  6:43 PM Tuesday

At Tinian Island...
Low  tide  0.0 feet at  9:47 AM Monday
High tide  1.4 feet at  6:21 PM Monday
Low  tide  1.4 feet at  8:56 PM Monday
High tide  1.6 feet at  1:49 AM Tuesday
Low  tide -0.1 feet at 10:34 AM Tuesday
High tide  1.5 feet at  6:57 PM Tuesday

At Tanapag Harbor, Saipan...
Low  tide  0.2 feet at 10:12 AM Monday
High tide  1.7 feet at  6:47 PM Monday
Low  tide  1.7 feet at  9:13 PM Monday
High tide  2.0 feet at  2:17 AM Tuesday
Low  tide  0.0 feet at 10:58 AM Tuesday
High tide  1.8 feet at  7:25 PM Tuesday

* 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.

$$