FZPQ50 PGUM 241848 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 448 AM ChST Sat Oct 25 2025 .DISCUSSION...There will be a moderate risk of rip currents along north and east facing reefs of the Marianas through much of next week. There will also be a moderate risk of lightning through at least tonight, and again around midweek next week. $$ GUZ001-MPZ001>003-251000- Guam-Rota-Tinian-Saipan- 448 AM ChST Sat Oct 25 2025 36 hour Surf Zone Forecast for the Marianas from 600 AM Saturday through 600 PM Sunday .TODAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............3 to 5 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............9 seconds. Secondary swell..............North at around 2 feet. Secondary period.............10 seconds. Water Temperature Ritidian buoy..........86 Degrees. Max Heat Index.........Around 102. Winds...............East at around 10 mph. .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............3 to 5 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............9 seconds. Secondary swell..............North at around 2 feet. Secondary period.............10 seconds. Winds...............East at 10 to 15 mph. .SUNDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............4 to 5 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............9 seconds. Secondary swell..............North at around 3 feet. Secondary period.............10 seconds. Max Heat Index.........Around 102. Winds...............East at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.1 feet at 10:35 AM Saturday Low tide 1.5 feet at 3:55 PM Saturday High tide 2.0 feet at 8:30 PM Saturday Low tide -0.2 feet at 3:56 AM Sunday High tide 2.0 feet at 11:27 AM Sunday Low tide 1.6 feet at 4:40 PM Sunday At Rota Island... High tide 1.9 feet at 10:32 AM Saturday Low tide 1.4 feet at 3:49 PM Saturday High tide 1.8 feet at 8:27 PM Saturday Low tide -0.2 feet at 3:50 AM Sunday High tide 1.9 feet at 11:24 AM Sunday Low tide 1.5 feet at 4:34 PM Sunday At Tinian Island... High tide 1.5 feet at 11:15 AM Saturday Low tide 1.3 feet at 3:27 PM Saturday High tide 1.5 feet at 7:32 PM Saturday Low tide -0.2 feet at 3:52 AM Sunday High tide 1.5 feet at 12:20 PM Sunday Low tide 1.3 feet at 4:16 PM Sunday At Tanapag Harbor, Saipan... High tide 2.0 feet at 11:08 AM Saturday Low tide 1.6 feet at 3:47 PM Saturday High tide 1.9 feet at 8:22 PM Saturday Low tide 0.0 feet at 4:06 AM Sunday High tide 2.0 feet at 12:04 PM Sunday Low tide 1.7 feet at 4:29 PM Sunday * 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. $$