147
FZPQ50 PGUM 210530
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
330 PM ChST Wed Apr 21 2021

.SYNOPSIS...There will be hazardous surf and a high risk of rip
currents along north and west facing reefs of the Marianas through
at least Thursday night.

$$

GUZ001>004-212030-
Guam-Rota-Tinian-Saipan-
330 PM ChST Wed Apr 21 2021

...HIGH SURF ADVISORY UNTIL 7 AM CHST SATURDAY ALONG WEST AND
NORTH FACING REEFS...

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

.TONIGHT (6 PM TO 6 AM THURSDAY)...
Coastal Winds............Northeast at 5 to 10 mph.
Surf along North facing reefs............7 to 9 feet.
Surf along East  facing reefs............4 to 6 feet.
Surf along South facing reefs............4 to 6 feet.
Surf along West  facing reefs............8 to 10 feet.
Primary swell...............West at 5 to 7 feet.
Primary period..............14 seconds.
Secondary swell...............East at around 3 feet.
Secondary period..............11 seconds.

Rip current risk.....High. Pounding surf will produce life
                     threatening rip currents at reefs and
                     beaches.

Sea surface temperature at Ritidian buoy...85 Degrees.

.THURSDAY AND THURSDAY NIGHT(6 AM TO 6 AM FRIDAY)...
Coastal Winds............East at 5 to 10 mph.
Surf along North facing reefs............7 to 9 feet.
Surf along East  facing reefs............4 to 6 feet.
Surf along South facing reefs............3 to 5 feet.
Surf along West  facing reefs............7 to 9 feet.
Primary swell...............West at 5 to 6 feet.
Primary period..............14 seconds.
Secondary swell...............East at around 3 feet.
Secondary period..............11 seconds.

Rip current risk.....High. Pounding surf will produce life
                     threatening rip currents at reefs and
                     beaches.

Maximum afternoon heat index...........Around 94.

.OUTLOOK...Surf will likely fall by a foot on Friday, ending the
hazardous surf along north and west facing reefs. There is still a
chance high surf could resume late Sunday or Monday, mainly along
north facing reefs.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide  0.2 feet at  8:51 PM Wednesday
High tide  2.3 feet at  4:35 AM Thursday
Low  tide  1.5 feet at 10:13 AM Thursday
High tide  2.0 feet at  2:45 PM Thursday
Low  tide  0.2 feet at  9:52 PM Thursday
High tide  2.4 feet at  5:12 AM Friday
Low  tide  1.3 feet at 11:01 AM Friday

At Rota Island...
Low  tide  0.2 feet at  8:45 PM Wednesday
High tide  2.1 feet at  4:32 AM Thursday
Low  tide  1.4 feet at 10:07 AM Thursday
High tide  1.8 feet at  2:42 PM Thursday
Low  tide  0.2 feet at  9:46 PM Thursday
High tide  2.2 feet at  5:09 AM Friday
Low  tide  1.2 feet at 10:55 AM Friday

At Tinian Island...
Low  tide  0.1 feet at  8:35 PM Wednesday
High tide  1.6 feet at  4:36 AM Thursday
Low  tide  1.2 feet at  9:47 AM Thursday
High tide  1.5 feet at  2:07 PM Thursday
Low  tide  0.1 feet at  9:31 PM Thursday
High tide  1.6 feet at  4:56 AM Friday
Low  tide  1.0 feet at 10:29 AM Friday

At Tanapag Harbor, Saipan...
Low  tide  0.2 feet at  9:00 PM Wednesday
High tide  2.2 feet at  4:50 AM Thursday
Low  tide  1.3 feet at 10:32 AM Thursday
High tide  1.6 feet at  2:43 PM Thursday
Low  tide  0.1 feet at  9:58 PM Thursday
High tide  2.2 feet at  5:21 AM Friday
Low  tide  1.1 feet at 11:07 AM Friday

$$