989
FZPQ50 PGUM 170643
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
443 PM ChST Tue Sep 17 2024

.SYNOPSIS...The southwest to west swell this evening is still
producing surf up to 9 feet and a high risk of rip currents along
west facing reefs. As this swell continues to decrease surf and the
risk of rip currents will drop along west facing reefs Wednesday.
Moderate risk of lightning returns Thursday as a trough moves through
the Marianas.

$$

GUZ001-MPZ001>003-172145-
Guam-Rota-Tinian-Saipan-
443 PM ChST Tue Sep 17 2024

...HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM CHST WEDNESDAY...

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

.TONIGHT (6 PM TO 6 AM WEDNESDAY)...
Rip current risk.....High *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............7 to 9 feet.
Swell/Period
      Primary swell................Southwest at 5 to 7 feet.
      Primary period...............10 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............8 seconds.
Water temperature
      Tanapag buoy..........86 Degrees.
Coastal Winds............Southeast at 10 to 15 mph decreasing to
                         10 mph after midnight.


.WEDNESDAY AND WEDNESDAY NIGHT (6 AM TO 6 PM)...
Rip current risk.....Moderate *.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............3 to 5 feet.
      South facing reefs............3 to 5 feet.
      West  facing reefs............6 to 8 feet.
Swell/Period
      Primary swell................Southwest to west at 4 to 6 feet.
      Primary period...............9 seconds.
      Secondary swell..............East at around 3 feet.
      Secondary period.............9 seconds.
Maximum afternoon heat index...........Around 101.
Coastal Winds............East at around 10 mph.

.OUTLOOK...Surf will diminish 1 to 2 feet along south and west facing
reefs by Friday.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
High tide  2.6 feet at  7:31 PM Tuesday
Low  tide  0.9 feet at  1:20 AM Wednesday
High tide  2.7 feet at  7:02 AM Wednesday
Low  tide  0.1 feet at  1:38 PM Wednesday
High tide  2.6 feet at  7:58 PM Wednesday
Low  tide  0.6 feet at  2:04 AM Thursday
High tide  2.7 feet at  8:00 AM Thursday

At Rota Island...
High tide  2.4 feet at  7:28 PM Tuesday
Low  tide  0.9 feet at  1:14 AM Wednesday
High tide  2.5 feet at  6:59 AM Wednesday
Low  tide  0.1 feet at  1:32 PM Wednesday
High tide  2.5 feet at  7:55 PM Wednesday
Low  tide  0.6 feet at  1:58 AM Thursday
High tide  2.5 feet at  7:57 AM Thursday

At Tinian Island...
High tide  1.6 feet at  7:02 PM Tuesday
Low  tide  0.7 feet at 12:37 AM Wednesday
High tide  1.7 feet at  6:13 AM Wednesday
Low  tide  0.0 feet at  1:02 PM Wednesday
High tide  1.6 feet at  7:25 PM Wednesday
Low  tide  0.5 feet at  1:30 AM Thursday
High tide  1.7 feet at  7:20 AM Thursday

At Tanapag Harbor, Saipan...
High tide  2.2 feet at  7:46 PM Tuesday
Low  tide  0.9 feet at  1:21 AM Wednesday
High tide  2.3 feet at  7:10 AM Wednesday
Low  tide  0.0 feet at  1:47 PM Wednesday
High tide  2.2 feet at  8:12 PM Wednesday
Low  tide  0.6 feet at  2:09 AM Thursday
High tide  2.3 feet at  8:12 AM Thursday

* 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.

$$