193
FZPQ50 PGUM 171747
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
347 AM ChST Fri Apr 18 2025

.DISCUSSION...A moderate risk of rip currents is expected to continue
along north and east facing reefs through at least the weekend. There
is currently a moderate risk of rip currents along west facing reefs,
which is expected to decrease to low by Saturday as northwest swell
diminishes.

$$

GUZ001-MPZ001>003-180900-
Guam-Rota-Tinian-Saipan-
347 AM ChST Fri Apr 18 2025

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

.TODAY...
Rip Current Risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................Northeast at 5 to 6 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northwest at around 2 feet.
      Secondary period.............11 seconds.
Water Temperature
      Ritidian buoy..........84 Degrees.
Max Heat Index.........Around 100.
Winds...............East at 15 to 20 mph.

.TONIGHT...
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..............Northwest at around 2 feet.
      Secondary period.............10 seconds.
Winds...............East at 10 to 20 mph.

.SATURDAY...
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............1 to 3 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............8 seconds.
      Secondary swell..............Northeast at around 2 feet.
      Secondary period.............9 seconds.
Max Heat Index.........Around 100.
Winds...............East at 10 to 15 mph.


Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.6 feet at  4:54 AM Friday
High tide  2.1 feet at  9:30 AM Friday
Low  tide  0.0 feet at  5:06 PM Friday
High tide  2.1 feet at 12:42 AM Saturday
Low  tide  1.7 feet at  5:42 AM Saturday
High tide  2.0 feet at 10:06 AM Saturday

At Rota Island...
Low  tide  1.5 feet at  4:48 AM Friday
High tide  1.9 feet at  9:27 AM Friday
Low  tide  0.0 feet at  5:00 PM Friday
High tide  2.0 feet at 12:39 AM Saturday
Low  tide  1.6 feet at  5:36 AM Saturday
High tide  1.9 feet at 10:03 AM Saturday

At Tinian Island...
Low  tide  1.5 feet at  4:30 AM Friday
High tide  1.6 feet at  8:30 AM Friday
Low  tide  0.1 feet at  4:54 PM Friday
High tide  1.6 feet at  1:30 AM Saturday
Low  tide  1.5 feet at  5:24 AM Saturday
High tide  1.6 feet at  9:06 AM Saturday

At Tanapag Harbor, Saipan...
Low  tide  1.7 feet at  4:49 AM Friday
High tide  1.9 feet at  8:57 AM Friday
Low  tide  0.0 feet at  5:09 PM Friday
High tide  2.0 feet at  1:22 AM Saturday
Low  tide  1.7 feet at  6:14 AM Saturday
High tide  1.8 feet at  9:23 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.

$$