FZPQ50 PGUM 122219 CCA SRFGUM Surf Zone Forecast for the Mariana Islands...CORRECTED National Weather Service Tiyan GU 819 AM ChST Sat Dec 13 2025 .DISCUSSION...There will be a moderate risk of rip currents along north and east facing reefs through tonight, which will then become high along north and east facing reefs Sunday and require a high surf advisory and rip risk statement. $$ GUZ001-MPZ001>003-131000- Guam-Rota-Tinian-Saipan- 819 AM ChST Sat Dec 13 2025 Corrected surf heights. 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............6 to 8 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................Northeast at 4 to 6 feet. Primary period...............8 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............9 seconds. Water Temperature Ritidian buoy..........85 Degrees. Max Heat Index.........Around 100. Winds...............East at 10 to 20 mph. .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............6 to 8 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................Northeast at 4 to 6 feet. Primary period...............8 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............8 seconds. Winds...............Breezy. East at 15 to 25 mph. .SUNDAY... Rip Current Risk.....High *. Surf Height North facing reefs............7 to 9 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................Northeast at 5 to 7 feet. Primary period...............8 seconds. Max Heat Index.........Around 100. Winds...............Breezy. East at 15 to 25 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.6 feet at 8:05 AM Saturday High tide 2.1 feet at 3:03 PM Saturday Low tide 0.5 feet at 10:02 PM Saturday High tide 1.4 feet at 4:00 AM Sunday Low tide 0.9 feet at 9:03 AM Sunday High tide 2.1 feet at 3:33 PM Sunday Low tide 0.2 feet at 10:46 PM Sunday At Rota Island... Low tide 0.5 feet at 7:59 AM Saturday High tide 2.0 feet at 3:00 PM Saturday Low tide 0.5 feet at 9:56 PM Saturday High tide 1.3 feet at 3:57 AM Sunday Low tide 0.8 feet at 8:57 AM Sunday High tide 1.9 feet at 3:30 PM Sunday Low tide 0.2 feet at 10:40 PM Sunday At Tinian Island... Low tide 0.2 feet at 7:42 AM Saturday High tide 1.5 feet at 3:01 PM Saturday Low tide 0.2 feet at 9:39 PM Saturday High tide 1.0 feet at 3:58 AM Sunday Low tide 0.3 feet at 8:40 AM Sunday High tide 1.5 feet at 3:31 PM Sunday Low tide 0.1 feet at 10:23 PM Sunday At Tanapag Harbor, Saipan... Low tide 0.8 feet at 8:17 AM Saturday High tide 2.1 feet at 3:12 PM Saturday Low tide 0.6 feet at 10:19 PM Saturday High tide 1.5 feet at 4:33 AM Sunday Low tide 1.1 feet at 9:15 AM Sunday High tide 2.1 feet at 3:43 PM Sunday Low tide 0.4 feet at 10:56 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. $$