050
FZPQ50 PGUM 081731
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
331 AM ChST Thu Jan 9 2025

.SYNOPSIS...There is a moderate risk of rip currents along north,
east, and south facing reefs through tonight, spreading to west
facing reefs by Friday with the arrival of north to northwesterly
swell. Risk of rip currents may become high for east facing reefs
Friday.

$$

GUZ001-MPZ001>003-090845-
Guam-Rota-Tinian-Saipan-
331 AM ChST Thu Jan 9 2025

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

.TODAY (6 AM TO 6 PM)...
Rip current risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............15 seconds.
Water temperature
      Ritidian buoy.......... 84 Degrees.
Maximum afternoon heat index...........Around 100.
Coastal Winds............East at 10 to 15 mph.


.TONIGHT (6 PM TO 6 AM FRIDAY)...
Rip current risk.....Moderate *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................Northeast at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............14 seconds.
Coastal Winds............East at 10 to 15 mph.


.FRIDAY (6 AM TO 6 PM)...
Rip current risk.....High *.
Surf Height
      North facing reefs............4 to 6 feet.
      East  facing reefs............7 to 9 feet.
      South facing reefs............5 to 7 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................East at 5 to 7 feet.
      Primary period...............9 seconds.
      Secondary swell..............Northwest at around 3 feet.
      Secondary period.............12 seconds.
Maximum afternoon heat index...........Around 99.
Coastal Winds............East at 10 to 15 mph.

.OUTLOOK...A pulse of increased northerly swell will arrive late in
the weekend as the trade swell strengthens, contributing to higher
seas and surf into early next week. This may bring a high risk of rip
currents for north and east facing reefs.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  1.6 feet at  4:28 AM Thursday
Low  tide  1.2 feet at  8:50 AM Thursday
High tide  2.2 feet at  2:41 PM Thursday
Low  tide -0.4 feet at 10:26 PM Thursday
High tide  1.8 feet at  5:57 AM Friday
Low  tide  1.4 feet at 10:13 AM Friday

At Rota Island...
High tide  1.5 feet at  4:25 AM Thursday
Low  tide  1.1 feet at  8:44 AM Thursday
High tide  2.1 feet at  2:38 PM Thursday
Low  tide -0.4 feet at 10:20 PM Thursday
High tide  1.7 feet at  5:54 AM Friday
Low  tide  1.3 feet at 10:07 AM Friday

At Tinian Island...
High tide  1.2 feet at  4:00 AM Thursday
Low  tide  1.0 feet at  7:49 AM Thursday
High tide  1.9 feet at  1:58 PM Thursday
Low  tide -0.2 feet at 10:01 PM Thursday
High tide  1.4 feet at  5:41 AM Friday
Low  tide  1.3 feet at  8:52 AM Friday

At Tanapag Harbor, Saipan...
High tide  1.7 feet at  5:00 AM Thursday
Low  tide  1.4 feet at  9:02 AM Thursday
High tide  2.2 feet at  2:36 PM Thursday
Low  tide -0.2 feet at 10:33 PM Thursday
High tide  2.0 feet at  6:16 AM Friday
Low  tide  1.6 feet at 10:19 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.

$$