FZPQ50 PGUM 271757 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 357 AM ChST Tue Oct 28 2025 .DISCUSSION...There will be a moderate risk of rip currents along north and east facing reefs and a low risk along south and west facing reefs through the week. There will also be a moderate risk of lightning starting around Wednesday. $$ GUZ001-MPZ001>003-280900- Guam-Rota-Tinian-Saipan- 357 AM ChST Tue Oct 28 2025 36 hour Surf Zone Forecast for the Marianas from 600 AM Tuesday through 600 PM Wednesday .TODAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............3 to 5 feet. East facing reefs............5 to 7 feet. South facing reefs............2 to 4 feet. West facing reefs............1 to 3 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............9 seconds. Secondary swell..............Northeast at around 2 feet. Secondary period.............10 seconds. Water Temperature Ritidian buoy..........86 Degrees. Max Heat Index.........Around 100. Winds...............East at 10 to 15 mph. .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............3 to 5 feet. East facing reefs............5 to 7 feet. South facing reefs............2 to 4 feet. West facing reefs............1 to 3 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............9 seconds. Secondary swell..............Northeast at around 2 feet. Secondary period.............10 seconds. Winds...............East at 10 to 15 mph. .WEDNESDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............3 to 5 feet. East facing reefs............4 to 7 feet. South facing reefs............2 to 4 feet. West facing reefs............1 to 3 feet. Swell/Period Primary swell................East at 4 to 5 feet. Primary period...............9 seconds. Secondary swell..............Northeast at around 2 feet. Secondary period.............9 seconds. Max Heat Index.........Around 101. Winds...............East at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide -0.1 feet at 5:29 AM Tuesday High tide 2.0 feet at 1:44 PM Tuesday Low tide 1.6 feet at 6:55 PM Tuesday High tide 1.8 feet at 10:18 PM Tuesday Low tide 0.0 feet at 6:27 AM Wednesday High tide 2.0 feet at 2:49 PM Wednesday Low tide 1.6 feet at 8:24 PM Wednesday At Rota Island... Low tide -0.1 feet at 5:23 AM Tuesday High tide 1.8 feet at 1:41 PM Tuesday Low tide 1.5 feet at 6:49 PM Tuesday High tide 1.7 feet at 10:15 PM Tuesday Low tide 0.0 feet at 6:21 AM Wednesday High tide 1.9 feet at 2:46 PM Wednesday Low tide 1.5 feet at 8:18 PM Wednesday At Tinian Island... Low tide -0.2 feet at 5:26 AM Tuesday High tide 1.5 feet at 2:15 PM Tuesday Low tide 1.3 feet at 6:28 PM Tuesday High tide 1.4 feet at 9:22 PM Tuesday Low tide -0.1 feet at 6:20 AM Wednesday High tide 1.5 feet at 2:55 PM Wednesday Low tide 1.3 feet at 7:46 PM Wednesday At Tanapag Harbor, Saipan... Low tide 0.1 feet at 5:41 AM Tuesday High tide 2.0 feet at 1:58 PM Tuesday Low tide 1.7 feet at 7:14 PM Tuesday High tide 1.8 feet at 9:42 PM Tuesday Low tide 0.1 feet at 6:40 AM Wednesday High tide 2.0 feet at 3:00 PM Wednesday Low tide 1.6 feet at 8:52 PM Wednesday * 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. $$