FZPQ50 PGUM 300657 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 457 PM ChST Thu Apr 30 2026 .DISCUSSION...The east swell has subside slightly, allowing the risk of rip currents to decrease to moderate along east facing reefs this afternoon. Winds are expected increase slightly this weekend and may rebuild the east swell again early next week. This could increase the risk of rip currents along east facing reefs to high once again. A moderate risk of rip currents is expected along north facing reefs and a low risk along south and west facing reefs over the next few days. $$ GUZ001-MPZ001>003-302200- Guam-Rota-Tinian-Saipan- 457 PM ChST Thu Apr 30 2026 36 hour Surf Zone Forecast for the Marianas from 600 PM Thursday through 600 AM Saturday .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............5 to 7 feet. East facing reefs............6 to 8 feet. South facing reefs............1 to 3 feet. West facing reefs............1 to 2 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............8 seconds. Water Temperature Ipan buoy..........82 Degrees. Winds...............East at 10 to 15 mph. .FRIDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............5 to 7 feet. East facing reefs............6 to 8 feet. South facing reefs............1 to 3 feet. West facing reefs............1 to 2 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............8 seconds. Max Heat Index.........Around 100. Winds...............East at 10 to 15 mph. .FRIDAY NIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............5 to 7 feet. East facing reefs............6 to 8 feet. South facing reefs............1 to 3 feet. West facing reefs............1 to 2 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............8 seconds. Winds...............East at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.3 feet at 7:44 PM Thursday Low tide 1.3 feet at 1:18 AM Friday High tide 2.4 feet at 6:45 AM Friday Low tide 0.1 feet at 1:44 PM Friday High tide 2.3 feet at 8:29 PM Friday Low tide 1.4 feet at 1:59 AM Saturday High tide 2.3 feet at 7:07 AM Saturday At Rota Island... High tide 2.1 feet at 7:41 PM Thursday Low tide 1.2 feet at 1:12 AM Friday High tide 2.2 feet at 6:42 AM Friday Low tide 0.1 feet at 1:38 PM Friday High tide 2.2 feet at 8:26 PM Friday Low tide 1.3 feet at 1:53 AM Saturday High tide 2.2 feet at 7:04 AM Saturday At Tinian Island... High tide 1.7 feet at 7:42 PM Thursday Low tide 0.4 feet at 12:55 AM Friday High tide 1.8 feet at 6:43 AM Friday Low tide 0.0 feet at 1:21 PM Friday High tide 1.7 feet at 8:27 PM Friday Low tide 0.5 feet at 1:36 AM Saturday High tide 1.7 feet at 7:05 AM Saturday At Tanapag Harbor, Saipan... High tide 2.0 feet at 8:01 PM Thursday Low tide 1.2 feet at 1:07 AM Friday High tide 2.1 feet at 6:40 AM Friday Low tide -0.1 feet at 1:45 PM Friday High tide 2.0 feet at 8:50 PM Friday Low tide 1.4 feet at 1:53 AM Saturday High tide 2.1 feet at 6:59 AM Saturday * 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. $$