FZPQ50 PGUM 190627 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 427 PM ChST Tue Aug 19 2025 .DISCUSSION...There will be a moderate risk of rip currents along east facing reefs through at least Thursday. A slight decrease in the swell may allow the risk of rip currents to become low along all reefs late week or over the weekend. There will be a moderate risk of lightning through the week. $$ GUZ001-MPZ001>003-192200- Guam-Rota-Tinian-Saipan- 427 PM ChST Tue Aug 19 2025 36 hour Surf Zone Forecast for the Marianas from 600 PM Tuesday through 600 AM Thursday .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 3 feet. East facing reefs............5 to 6 feet. South facing reefs............2 to 4 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 3 to 5 feet. Primary period...............8 seconds. Water Temperature Ritidian buoy..........86 Degrees. Winds...............East at 5 to 10 mph. .WEDNESDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............1 to 3 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............8 seconds. Max Heat Index.........Around 102. Winds...............East at 10 to 15 mph. .WEDNESDAY NIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............1 to 3 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Winds...............East at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.4 feet at 6:19 PM Tuesday Low tide 1.9 feet at 11:04 PM Tuesday High tide 2.4 feet at 3:44 AM Wednesday Low tide -0.2 feet at 11:30 AM Wednesday High tide 2.4 feet at 7:04 PM Wednesday Low tide 1.7 feet at 12:06 AM Thursday High tide 2.5 feet at 4:55 AM Thursday At Rota Island... High tide 2.2 feet at 6:16 PM Tuesday Low tide 1.7 feet at 10:58 PM Tuesday High tide 2.3 feet at 3:41 AM Wednesday Low tide -0.2 feet at 11:24 AM Wednesday High tide 2.3 feet at 7:01 PM Wednesday Low tide 1.6 feet at 12:00 AM Thursday High tide 2.3 feet at 4:52 AM Thursday At Tinian Island... High tide 1.6 feet at 6:14 PM Tuesday Low tide 1.4 feet at 9:53 PM Tuesday High tide 1.8 feet at 2:40 AM Wednesday Low tide -0.4 feet at 11:02 AM Wednesday High tide 1.6 feet at 6:54 PM Wednesday Low tide 1.3 feet at 10:58 PM Wednesday High tide 1.8 feet at 3:48 AM Thursday At Tanapag Harbor, Saipan... High tide 2.1 feet at 6:37 PM Tuesday Low tide 1.7 feet at 10:49 PM Tuesday High tide 2.1 feet at 3:28 AM Wednesday Low tide -0.4 feet at 11:30 AM Wednesday High tide 2.2 feet at 7:20 PM Wednesday Low tide 1.6 feet at 11:52 PM Wednesday High tide 2.1 feet at 4:48 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. Rip currents will be life threatening. If caught in a rip current, swim parallel to the beachrather than against the current. $$