238
FZPQ50 PGUM 200607
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
407 PM ChST Sun Apr 20 2025

.DISCUSSION...The risk of rip currents is moderate along east facing
reefs and low along all other reefs. Surf will decrease a foot along
east facing reefs Monday night as the east swell subsides slightly,
but the risk of rip currents is expected to remain moderate along
east facing reefs. Surf is expected to change very little through at
least Thursday, with the east swell remaining the primary swell.

$$

GUZ001-MPZ001>003-202115-
Guam-Rota-Tinian-Saipan-
407 PM ChST Sun Apr 20 2025

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

.TONIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 2 feet.
      Secondary period.............10 seconds.
Water Temperature
      Tanapag buoy..........84 Degrees.
Winds...............East at 10 to 15 mph.

.MONDAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............2 to 4 feet.
      East  facing reefs............4 to 6 feet.
      South facing reefs............1 to 3 feet.
      West  facing reefs............Around 1 foot.
Swell/Period
      Primary swell................East at 2 to 4 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at 1 to 2 feet.
      Secondary period.............10 seconds.
Max Heat Index.........Around 99.
Winds...............East at 10 to 15 mph.

.MONDAY NIGHT...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............1 to 3 feet.
      East  facing reefs............3 to 5 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.
      Secondary swell..............North at 1 to 2 feet.
      Secondary period.............9 seconds.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.1 feet at  6:54 PM Sunday
High tide  2.1 feet at  3:06 AM Monday
Low  tide  1.8 feet at  8:12 AM Monday
High tide  2.0 feet at 12:06 PM Monday
Low  tide  0.1 feet at  8:00 PM Monday
High tide  2.2 feet at  3:54 AM Tuesday
Low  tide  1.6 feet at  9:24 AM Tuesday

At Rota Island...
Low  tide  0.1 feet at  6:48 PM Sunday
High tide  2.0 feet at  3:03 AM Monday
Low  tide  1.6 feet at  8:06 AM Monday
High tide  1.9 feet at 12:03 PM Monday
Low  tide  0.1 feet at  7:54 PM Monday
High tide  2.1 feet at  3:51 AM Tuesday
Low  tide  1.5 feet at  9:18 AM Tuesday

At Tinian Island...
Low  tide  0.0 feet at  6:48 PM Sunday
High tide  1.6 feet at  3:12 AM Monday
Low  tide  1.4 feet at  7:42 AM Monday
High tide  1.6 feet at 11:18 AM Monday
Low  tide  0.0 feet at  7:48 PM Monday
High tide  1.6 feet at  3:42 AM Tuesday
Low  tide  1.3 feet at  8:42 AM Tuesday

At Tanapag Harbor, Saipan...
Low  tide  0.1 feet at  7:06 PM Sunday
High tide  2.1 feet at  3:28 AM Monday
Low  tide  1.6 feet at  9:15 AM Monday
High tide  1.7 feet at 11:50 AM Monday
Low  tide  0.1 feet at  8:08 PM Monday
High tide  2.1 feet at  4:13 AM Tuesday
Low  tide  1.5 feet at 10:00 AM Tuesday

* 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.

$$