147
FZPQ50 PGUM 181736
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
336 AM ChST Sat Apr 19 2025

.DISCUSSION...A moderate risk of rip currents is expected to continue
along north and east facing reefs through at least the weekend. The
primary trade swell is expected to subside a bit into early next week,
and surf will gradually decrease along north and east facing reefs.
The risk of rip currents will likely remain moderate for east facing
reefs, but could fall to low for north facing reefs early next week.

$$

GUZ001-MPZ001>003-190845-
Guam-Rota-Tinian-Saipan-
336 AM ChST Sat Apr 19 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 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.............10 seconds.
Water Temperature
      Tanapag buoy..........83 Degrees.
Max Heat Index.........Around 99.
Winds...............East at 10 to 20 mph.

.TONIGHT...
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............1 to 3 feet.
Swell/Period
      Primary swell................East at 4 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 2 feet.
      Secondary period.............10 seconds.
Winds...............East at 10 to 15 mph.

.SUNDAY...
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............1 to 3 feet.
Swell/Period
      Primary swell................East at 3 to 5 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 2 feet.
      Secondary period.............9 seconds.
Max Heat Index.........Around 98.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.7 feet at  5:42 AM Saturday
High tide  2.0 feet at 10:06 AM Saturday
Low  tide  0.0 feet at  5:54 PM Saturday
High tide  2.1 feet at  1:54 AM Sunday
Low  tide  1.8 feet at  6:54 AM Sunday
High tide  2.0 feet at 10:54 AM Sunday

At Rota Island...
Low  tide  1.6 feet at  5:36 AM Saturday
High tide  1.9 feet at 10:03 AM Saturday
Low  tide  0.0 feet at  5:48 PM Saturday
High tide  2.0 feet at  1:51 AM Sunday
Low  tide  1.7 feet at  6:48 AM Sunday
High tide  1.9 feet at 10:51 AM Sunday

At Tinian Island...
Low  tide  1.5 feet at  5:24 AM Saturday
High tide  1.6 feet at  9:06 AM Saturday
Low  tide  0.0 feet at  5:48 PM Saturday
High tide  1.6 feet at  2:24 AM Sunday
Low  tide  1.5 feet at  6:30 AM Sunday
High tide  1.6 feet at 10:06 AM Sunday

At Tanapag Harbor, Saipan...
Low  tide  1.7 feet at  6:14 AM Saturday
High tide  1.8 feet at  9:23 AM Saturday
Low  tide  0.0 feet at  6:05 PM Saturday
High tide  2.0 feet at  2:25 AM Sunday
Low  tide  1.7 feet at  7:50 AM Sunday
High tide  1.8 feet at 10:09 AM Sunday

* 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.

$$