164
FZPQ50 PGUM 170538
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
338 PM ChST Tue Jun 17 2025

.DISCUSSION...There will be a low risk of rip currents along all
reefs and beaches through Wednesday. Trade wind swell will build
just a little on Wednesday bringing a moderate rip current risk
to east facing reefs. There will be a moderate risk of lightning
through Wednesday night for Guam. Seas and surf will fall around
a foot this weekend as trade wind and swell subside.

$$

GUZ001-MPZ001>003-172000-
Guam-Rota-Tinian-Saipan-
338 PM ChST Tue Jun 17 2025

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

.TONIGHT...
Rip Current Risk.....Low  *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 1 to 3 feet.
      Primary period...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at around 10 mph.

.WEDNESDAY...
Rip Current Risk.....Low  *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............2 to 4 feet.
      South facing reefs............1 to 2 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Max Heat Index.........Around 102.
Winds...............East at 10 to 15 mph.

.WEDNESDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 3 feet.
      Primary period...............8 seconds.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.2 feet at  5:55 PM Tuesday
High tide  2.6 feet at  1:12 AM Wednesday
Low  tide  1.5 feet at  7:20 AM Wednesday
High tide  2.1 feet at 11:56 AM Wednesday
Low  tide  0.5 feet at  6:43 PM Wednesday
High tide  2.7 feet at  1:45 AM Thursday

At Rota Island...
Low  tide  0.2 feet at  5:49 PM Tuesday
High tide  2.5 feet at  1:09 AM Wednesday
Low  tide  1.5 feet at  7:14 AM Wednesday
High tide  2.0 feet at 11:53 AM Wednesday
Low  tide  0.5 feet at  6:37 PM Wednesday
High tide  2.5 feet at  1:42 AM Thursday

At Tinian Island...
Low  tide  0.0 feet at  5:28 PM Tuesday
High tide  1.7 feet at  1:01 AM Wednesday
Low  tide  1.1 feet at  7:08 AM Wednesday
High tide  1.3 feet at 11:12 AM Wednesday
Low  tide  0.2 feet at  6:11 PM Wednesday
High tide  1.8 feet at  1:22 AM Thursday

At Tanapag Harbor, Saipan...
Low  tide -0.1 feet at  6:02 PM Tuesday
High tide  2.3 feet at  1:28 AM Wednesday
Low  tide  1.2 feet at  7:50 AM Wednesday
High tide  1.6 feet at 12:05 PM Wednesday
Low  tide  0.2 feet at  6:48 PM Wednesday
High tide  2.3 feet at  1:54 AM Thursday

* 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.

$$