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FZPQ50 PGUM 190600
SRFGUM

Surf Zone Forecast for the Mariana Islands
National Weather Service Tiyan GU
400 PM ChST Wed Nov 19 2025

.DISCUSSION...There will be a moderate risk of rip currents along
north and east facing reefs of the Marianas through Thursday. Trade-
wind swell and surf will then build Thursday night and Friday causing
the risk of rip currents to become high east facing reefs. There will
be a moderate risk of lightning for all of the Marianas beginning
Thursday night.

$$

GUZ001-MPZ001>003-192045-
Guam-Rota-Tinian-Saipan-
400 PM ChST Wed Nov 19 2025

...HIGH RISK OF RIP CURRENTS FROM THURSDAY EVENING THROUGH
WEDNESDAY AFTERNOON ALONG EAST FACING REEFS...

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

.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 5 to 7 feet.
      Primary period...............7 seconds.
Water Temperature
      Ritidian buoy..........86 Degrees.
Winds...............East at 15 to 20 mph.

.THURSDAY...
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 5 to 7 feet.
      Primary period...............7 seconds.
Max Heat Index.........Around 100.
Winds...............East at 15 to 20 mph.

.THURSDAY NIGHT...
Rip Current Risk.....High.
Surf Height
      North facing reefs............5 to 7 feet.
      East  facing reefs............7 to 9 feet.
      South facing reefs............2 to 4 feet.
      West  facing reefs............2 to 4 feet.
Swell/Period
      Primary swell................East at 6 to 8 feet.
      Primary period...............7 seconds.
Winds...............East at 15 to 20 mph.

Tide information for the next 36 hours...

At Apra Harbor, Guam...
Low  tide -0.4 feet at  1:26 AM Thursday
High tide  2.1 feet at  8:34 AM Thursday
Low  tide  1.3 feet at  1:48 PM Thursday
High tide  2.0 feet at  6:38 PM Thursday
Low  tide -0.5 feet at  1:54 AM Friday
High tide  2.1 feet at  9:11 AM Friday

At Rota Island...
Low  tide -0.3 feet at  1:20 AM Thursday
High tide  1.9 feet at  8:31 AM Thursday
Low  tide  1.3 feet at  1:42 PM Thursday
High tide  1.9 feet at  6:35 PM Thursday
Low  tide -0.4 feet at  1:48 AM Friday
High tide  2.0 feet at  9:08 AM Friday

At Tinian Island...
Low  tide -0.2 feet at  1:07 AM Thursday
High tide  1.5 feet at  8:45 AM Thursday
Low  tide  1.3 feet at 12:44 PM Thursday
High tide  1.6 feet at  5:33 PM Thursday
Low  tide -0.3 feet at  1:40 AM Friday
High tide  1.5 feet at  9:36 AM Friday

At Tanapag Harbor, Saipan...
Low  tide -0.1 feet at  1:31 AM Thursday
High tide  2.0 feet at  8:54 AM Thursday
Low  tide  1.6 feet at  1:38 PM Thursday
High tide  2.1 feet at  6:31 PM Thursday
Low  tide -0.2 feet at  2:03 AM Friday
High tide  2.1 feet at  9:34 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. Rip currents
will be life threatening. If caught in a rip current, swim parallel
to the beach rather than against the current.

$$