711
FZPQ50 PGUM 120610
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
410 PM ChST Thu Jun 12 2025

.DISCUSSION...There is a low risk for rip currents along all reefs
tonight, and then there will be a moderate risk for rip currents
along east facing reefs Friday as the swell becomes easterly. The
moderate risk for rip currents looks to persist through the weekend
before potentially falling to low for all reefs on Monday. There will
be a moderate risk for lightning across the Guam and Rota coastal
waters through Friday.

$$

GUZ001-MPZ001>003-122115-
Guam-Rota-Tinian-Saipan-
410 PM ChST Thu Jun 12 2025

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

.TONIGHT...
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................Northeast at 1 to 3 feet.
      Primary period...............8 seconds.
      Secondary swell..............West at around 2 feet.
      Secondary period.............9 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at 10 to 15 mph.

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

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


Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.5 feet at  9:59 PM Thursday
Low  tide  1.9 feet at  3:09 AM Friday
High tide  2.4 feet at  7:30 AM Friday
Low  tide -0.2 feet at  3:05 PM Friday
High tide  2.5 feet at 10:40 PM Friday
Low  tide  1.9 feet at  3:51 AM Saturday

At Rota Island...
High tide  2.3 feet at  9:56 PM Thursday
Low  tide  1.8 feet at  3:03 AM Friday
High tide  2.2 feet at  7:27 AM Friday
Low  tide -0.2 feet at  2:59 PM Friday
High tide  2.3 feet at 10:37 PM Friday
Low  tide  1.8 feet at  3:45 AM Saturday

At Tinian Island...
High tide  1.7 feet at 10:25 PM Thursday
Low  tide  1.6 feet at  2:18 AM Friday
High tide  1.8 feet at  6:18 AM Friday
Low  tide -0.3 feet at  2:46 PM Friday
High tide  1.7 feet at 11:11 PM Friday
Low  tide  1.6 feet at  3:07 AM Saturday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at 10:41 PM Thursday
Low  tide  1.9 feet at  3:16 AM Friday
High tide  2.0 feet at  6:58 AM Friday
Low  tide -0.4 feet at  3:14 PM Friday
High tide  2.2 feet at 11:24 PM Friday
Low  tide  1.8 feet at  4:08 AM 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.

$$