237
FZPQ50 PGUM 031806
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
406 AM ChST Fri Jul 4 2025

.DISCUSSION...A moderate risk of rip currents is expected along east
facing reefs of the Marianas through the weekend, with potential for
the risk to become moderate along west facing reefs once a secondary
westerly swell arrives in the first half of next week.

$$

GUZ001-MPZ001>003-040915-
Guam-Rota-Tinian-Saipan-
406 AM ChST Fri Jul 4 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............9 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Max Heat Index.........Around 100.
Winds...............Southeast at around 10 mph.

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............9 seconds.
Winds...............Southeast at around 10 mph in the evening
                    becoming light.

.SATURDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............1 to 2 feet.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............9 seconds.
Max Heat Index.........Around 100.
Winds...............Light and variable.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.8 feet at  9:15 AM Friday
High tide  1.9 feet at  3:45 PM Friday
Low  tide  1.5 feet at  8:18 PM Friday
High tide  2.4 feet at  2:30 AM Saturday
Low  tide  0.6 feet at 10:00 AM Saturday
High tide  2.0 feet at  5:15 PM Saturday

At Rota Island...
Low  tide  0.8 feet at  9:09 AM Friday
High tide  1.7 feet at  3:42 PM Friday
Low  tide  1.4 feet at  8:12 PM Friday
High tide  2.3 feet at  2:27 AM Saturday
Low  tide  0.6 feet at  9:54 AM Saturday
High tide  1.9 feet at  5:12 PM Saturday

At Tinian Island...
Low  tide  0.4 feet at  9:07 AM Friday
High tide  1.1 feet at  3:42 PM Friday
Low  tide  1.0 feet at  7:24 PM Friday
High tide  1.7 feet at  1:48 AM Saturday
Low  tide  0.2 feet at  9:49 AM Saturday
High tide  1.3 feet at  5:26 PM Saturday

At Tanapag Harbor, Saipan...
Low  tide  0.5 feet at  9:38 AM Friday
High tide  1.4 feet at  4:16 PM Friday
Low  tide  1.2 feet at  7:55 PM Friday
High tide  2.1 feet at  2:27 AM Saturday
Low  tide  0.3 feet at 10:17 AM Saturday
High tide  1.5 feet at  5:51 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. If caught in a
rip current, swim parallel to the beach rather than against the
current.

$$