972
FZPQ50 PGUM 170504
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
304 PM ChST Fri Jan 17 2025

.SYNOPSIS...There is a high risk of rip currents for north and east
facing reefs through tonight, and a moderate risk of rip currents for
west facing reefs through at least Saturday night. Elevated trade
swell and northerly swell continue to subside, allowing surf to fall
below hazardous conditions for north reefs by Saturday. It will take
longer for surf to subside along east facing reefs, and the high rip
current risk may need to be extended along those reefs, while the
rip current risk for north reefs will drop to moderate levels.

$$

GUZ001-MPZ001>003-172015-
Guam-Rota-Tinian-Saipan-
304 PM ChST Fri Jan 17 2025

...HIGH SURF ADVISORY IN EFFECT UNTIL 4 AM CHST SATURDAY...
...HIGH RISK OF RIP CURRENTS THROUGH LATE TONIGHT...

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

.TONIGHT (6 PM TO 6 AM SATURDAY)...
Rip current risk.....High *.
Surf Height
      North facing reefs............6 to 9 feet.
      East  facing reefs............7 to 9 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............4 to 6 feet.
Swell/Period
      Primary swell................East at 5 to 7 feet.
      Primary period...............9 to 10 seconds.
      Secondary swell..............North at around 4 feet.
      Secondary period.............12 to 14 seconds.
Water temperature
      Ritidian buoy.......... 84 Degrees.
Coastal Winds............East at 10 to 15 mph.


.SATURDAY (6 AM TO 6 PM)...
Rip current risk.....Moderate *.
Surf Height
      North facing reefs............5 to 8 feet.
      East  facing reefs............7 to 8 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................East at 5 to 7 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............12 seconds.
Maximum afternoon heat index...........Around 97.
Coastal Winds............East at 10 to 15 mph.


.SATURDAY NIGHT (6 PM TO 6 AM SUNDAY)...
Rip current risk.....Moderate *.
Surf Height
      North facing reefs............5 to 8 feet.
      East  facing reefs............6 to 8 feet.
      South facing reefs............2 to 3 feet.
      West  facing reefs............3 to 5 feet.
Swell/Period
      Primary swell................East at 5 to 7 feet.
      Primary period...............9 seconds.
      Secondary swell..............North at around 3 feet.
      Secondary period.............11 seconds.
Coastal Winds............East at 10 to 15 mph.

.OUTLOOK...Surf and rip current risk should remain at moderate levels
for the first half of next week, but a pulse of increased trade swell
looks to arrive around midweek, which may increase the rip current
risk, especially for east facing reefs.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  1.1 feet at  4:28 PM Friday
High tide  1.9 feet at  9:13 PM Friday
Low  tide -0.2 feet at  4:19 AM Saturday
High tide  2.0 feet at 11:17 AM Saturday
Low  tide  1.0 feet at  5:12 PM Saturday
High tide  1.8 feet at 10:00 PM Saturday

At Rota Island...
Low  tide  1.1 feet at  4:22 PM Friday
High tide  1.8 feet at  9:10 PM Friday
Low  tide -0.2 feet at  4:13 AM Saturday
High tide  1.9 feet at 11:14 AM Saturday
Low  tide  1.0 feet at  5:06 PM Saturday
High tide  1.6 feet at  9:57 PM Saturday

At Tinian Island...
Low  tide  1.2 feet at  4:09 PM Friday
High tide  1.6 feet at  8:27 PM Friday
Low  tide  0.1 feet at  4:03 AM Saturday
High tide  1.7 feet at 11:19 AM Saturday
Low  tide  1.1 feet at  5:03 PM Saturday
High tide  1.4 feet at  9:24 PM Saturday

At Tanapag Harbor, Saipan...
Low  tide  1.3 feet at  4:37 PM Friday
High tide  1.9 feet at  9:18 PM Friday
Low  tide  0.1 feet at  4:22 AM Saturday
High tide  2.1 feet at 11:39 AM Saturday
Low  tide  1.2 feet at  5:25 PM Saturday
High tide  1.7 feet at 10:07 PM 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.

$$