614
FZPQ50 PGUM 190601
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
401 PM ChST Thu Jun 19 2025

.DISCUSSION...A low risk of rip currents continues along all reefs
through at least Friday night. Models suggest the trade swell may
briefly increase to bring the surf up by a foot along east facing
reefs this weekend. This would bring the risk of rip currents along
said reefs up to moderate. This increase in swell is expected to be
short lived. The surf is expected to diminish by the beginning of
next week. On Friday, there is a moderate risk of lightning.

$$

GUZ001-MPZ001>003-192115-
Guam-Rota-Tinian-Saipan-
401 PM ChST Thu Jun 19 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............1 to 3 feet.
      East  facing reefs............3 to 4 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...............8 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at around 10 mph.

.FRIDAY...
Rip Current Risk.....Low  *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 4 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...............8 seconds.
Max Heat Index.........Around 102.
Winds...............Southeast at 10 to 15 mph.

.FRIDAY NIGHT...
Rip Current Risk.....Low *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 4 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...............8 seconds.
Winds...............Southeast at around 10 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.8 feet at  7:36 PM Thursday
High tide  2.7 feet at  2:18 AM Friday
Low  tide  0.8 feet at  9:13 AM Friday
High tide  2.1 feet at  3:09 PM Friday
Low  tide  1.2 feet at  8:34 PM Friday
High tide  2.7 feet at  2:54 AM Saturday

At Rota Island...
Low  tide  0.8 feet at  7:30 PM Thursday
High tide  2.6 feet at  2:15 AM Friday
Low  tide  0.8 feet at  9:07 AM Friday
High tide  1.9 feet at  3:06 PM Friday
Low  tide  1.1 feet at  8:28 PM Friday
High tide  2.6 feet at  2:51 AM Saturday

At Tinian Island...
Low  tide  0.5 feet at  6:58 PM Thursday
High tide  1.8 feet at  1:46 AM Friday
Low  tide  0.4 feet at  8:59 AM Friday
High tide  1.2 feet at  2:49 PM Friday
Low  tide  0.8 feet at  7:49 PM Friday
High tide  1.9 feet at  2:14 AM Saturday

At Tanapag Harbor, Saipan...
Low  tide  0.5 feet at  7:37 PM Thursday
High tide  2.3 feet at  2:21 AM Friday
Low  tide  0.5 feet at  9:28 AM Friday
High tide  1.5 feet at  3:27 PM Friday
Low  tide  0.9 feet at  8:32 PM Friday
High tide  2.4 feet at  2:51 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.

$$