055
FZPQ50 PGUM 160619
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
419 PM ChST Wed Apr 16 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs through at least the weekend. There will
also be a moderate risk of lightning early Thursday morning.

$$

GUZ001-MPZ001>003-162130-
Guam-Rota-Tinian-Saipan-
419 PM ChST Wed Apr 16 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............5 to 7 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............12 seconds.
Water Temperature
      Tanapag buoy..........84 Degrees.
Winds...............East at 15 to 20 mph.

.THURSDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............12 seconds.
Max Heat Index.........Around 99.
Winds...............East at 15 to 20 mph.

.THURSDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............3 to 5 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 2 feet.
      Secondary period.............12 seconds.
Winds...............East at 15 to 20 mph.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.2 feet at 10:48 PM Wednesday
Low  tide  1.5 feet at  4:12 AM Thursday
High tide  2.1 feet at  9:00 AM Thursday
Low  tide  0.0 feet at  4:18 PM Thursday
High tide  2.1 feet at 11:42 PM Thursday
Low  tide  1.6 feet at  4:54 AM Friday
High tide  2.1 feet at  9:30 AM Friday

At Rota Island...
High tide  2.0 feet at 10:45 PM Wednesday
Low  tide  1.4 feet at  4:06 AM Thursday
High tide  2.0 feet at  8:57 AM Thursday
Low  tide  0.0 feet at  4:12 PM Thursday
High tide  2.0 feet at 11:39 PM Thursday
Low  tide  1.5 feet at  4:48 AM Friday
High tide  1.9 feet at  9:27 AM Friday

At Tinian Island...
High tide  1.6 feet at 11:18 PM Wednesday
Low  tide  1.4 feet at  3:42 AM Thursday
High tide  1.6 feet at  7:54 AM Thursday
Low  tide  0.1 feet at  4:06 PM Thursday
High tide  1.6 feet at 12:24 AM Friday
Low  tide  1.5 feet at  4:30 AM Friday
High tide  1.6 feet at  8:30 AM Friday

At Tanapag Harbor, Saipan...
High tide  2.0 feet at 11:23 PM Wednesday
Low  tide  1.6 feet at  3:58 AM Thursday
High tide  1.9 feet at  8:36 AM Thursday
Low  tide  0.0 feet at  4:22 PM Thursday
High tide  2.0 feet at 12:23 AM Friday
Low  tide  1.7 feet at  4:49 AM Friday
High tide  1.9 feet at  8:57 AM Friday

* 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.

$$