FZPQ50 PGUM 220630 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 430 PM ChST Sun Mar 22 2026 .DISCUSSION... Elevated northeast to east swell, and minor long-period north to northeast swell will continue to produce elevated surf along north facing reefs through Monday night and a high risk of rip currents along east facing reefs through Tuesday afternoon. A moderate risk of rip currents will continue along west and south facing reefs through tonight, before rip risk along west reefs decreases to low Monday. There is a moderate risk of lightning for Guam and Rota late tonight through Tuesday. $$ GUZ001-MPZ001>003-222200- Guam-Rota-Tinian-Saipan- 430 PM ChST Sun Mar 22 2026 ...HIGH SURF ADVISORY IS NO LONGER IN EFFECT... ...HIGH RISK OF RIP CURRENTS THROUGH TUESDAY AFTERNOON ALONG EAST FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 PM Sunday through 600 AM Monday .TONIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............6 to 8 feet. East facing reefs............7 to 10 feet. South facing reefs............3 to 5 feet. West facing reefs............3 to 5 feet. Swell/Period Primary swell................Northeast to east at 5 to 7 feet. Primary period...............8 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............12 seconds. Tertiary swell...............North at 1 to 2 feet. Tertiary period..............11 seconds. Water Temperature Ipan buoy..........81 Degrees. Winds...............Breezy. Northeast at 15 to 25 mph. .MONDAY... Rip Current Risk.....High *. Surf Height North facing reefs............6 to 8 feet. East facing reefs............7 to 10 feet. South facing reefs............3 to 5 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................Northeast to east at 5 to 7 feet. Primary period...............8 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............12 seconds. Max Heat Index.........Around 96. Winds...............Breezy. East at 15 to 25 mph. .MONDAY NIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............5 to 8 feet. East facing reefs............8 to 11 feet. South facing reefs............3 to 5 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 6 to 8 feet. Primary period...............8 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............11 seconds. Winds...............Breezy. Northeast at 15 to 25 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.3 feet at 10:48 PM Sunday Low tide 1.2 feet at 4:22 AM Monday High tide 2.4 feet at 9:44 AM Monday Low tide -0.3 feet at 4:58 PM Monday High tide 2.1 feet at 12:02 AM Tuesday Low tide 1.4 feet at 5:13 AM Tuesday At Rota Island... High tide 2.1 feet at 10:45 PM Sunday Low tide 1.1 feet at 4:16 AM Monday High tide 2.2 feet at 9:41 AM Monday Low tide -0.3 feet at 4:52 PM Monday High tide 2.0 feet at 11:59 PM Monday Low tide 1.4 feet at 5:07 AM Tuesday At Tinian Island... High tide 1.7 feet at 10:46 PM Sunday Low tide 0.4 feet at 3:59 AM Monday High tide 1.7 feet at 9:42 AM Monday Low tide -0.1 feet at 4:35 PM Monday High tide 1.6 feet at 12:00 AM Tuesday Low tide 0.5 feet at 4:50 AM Tuesday At Tanapag Harbor, Saipan... High tide 2.1 feet at 11:18 PM Sunday Low tide 1.3 feet at 4:24 AM Monday High tide 2.1 feet at 9:35 AM Monday Low tide -0.2 feet at 5:01 PMMonday High tide 2.1 feet at 12:39 AM Tuesday Low tide 1.6 feet at 5:23 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 than against the current. $$