FZPQ50 PGUM 210722 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 522 PM ChST Sun Jun 21 2026 .DISCUSSION... There is a moderate risk of rip currents along south- and east-facing reefs tonight. There is a low risk of lightning during the afternoon hours of Monday. $$ GUZ001-MPZ001>003-212230- Guam-Rota-Tinian-Saipan- 522 PM ChST Sun Jun 21 2026 36 hour Surf Zone Forecast for the Marianas from 600 PM Sunday through 600 AM Tuesday .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............1 to 2 feet. East facing reefs............3 to 5 feet. South facing reefs............3 to 5 feet. West facing reefs............1 to 2 feet. Swell/Period Primary swell................East at 3 feet. Primary period...............8 seconds. Secondary swell..............Southeast at 2 feet. Secondary period.............10 seconds. Water Temperature Tanapag buoy.......... 87 Degrees. Winds...............Southeast at 10 mph in the evening becoming light. .MONDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 3 feet. East facing reefs............4 to 6 feet. South facing reefs............3 to 5 feet. West facing reefs............2 to 3 feet. Swell/Period Primary swell................East at 4 feet. Primary period...............8 seconds. Secondary swell..............Southwest at 2 feet. Secondary period.............10 seconds. Max Heat Index.........Around 101. Winds...............Light and variable. .MONDAY NIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 3 feet. East facing reefs............4 to 6 feet. South facing reefs............3 to 5 feet. West facing reefs............2 to 3 feet. Swell/Period Primary swell................East at 4 feet. Primary period...............8 seconds. Secondary swell..............Southwest at 2 feet. Secondary period.............10 seconds. Winds...............Light and variable. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.6 feet at 6:46 PM Sunday High tide 2.6 feet at 1:46 AM Monday Low tide 1.1 feet at 8:20 AM Monday High tide 1.9 feet at 1:40 PM Monday Low tide 1.0 feet at 7:35 PM Monday High tide 2.6 feet at 2:19 AM Tuesday At Rota Island... Low tide 0.6 feet at 6:40 PM Sunday High tide 2.5 feet at 1:43 AM Monday Low tide 1.1 feet at 8:14 AM Monday High tide 1.8 feet at 1:37 PM Monday Low tide 0.9 feet at 7:29 PM Monday High tide 2.4 feet at 2:16 AM Tuesday At Tinian Island... Low tide 0.2 feet at 6:23 PM Sunday High tide 1.9 feet at 1:44 AM Monday Low tide 0.4 feet at 7:57 AM Monday High tide 1.4 feet at 1:38 PM Monday Low tide 0.3 feet at 7:12 PM Monday High tide 1.9 feet at 2:17 AM Tuesday At Tanapag Harbor, Saipan... Low tide 0.3 feet at 6:52 PM Sunday High tide 2.3 feet at 1:53 AM Monday Low tide 0.8 feet at 8:42 AM Monday High tide 1.5 feet at 1:54 PM Monday Low tide 0.7 feet at 7:38 PM Monday High tide 2.2 feet at 2:23 AM Tuesday * 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 thanagainst the current. $$