FZPQ50 PGUM 050718 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 518 PM ChST Thu Nov 5 2026 .DISCUSSION... There will be a moderate risk of rip currents along north and east facing reefs through the weekend. Surf will be elevated along east- facing reefs, enhanced by approaching Invest 99W. Swells consist of an easterly trade wind swell and a small northwest swell. There will also be a moderate risk of lightning Friday night near Tinian and Saipan as 99W passes by to the north. $$ GUZ001-MPZ001>003-052230- Guam-Rota-Tinian-Saipan- 518 PM ChST Thu Nov 5 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 2 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at around 6 feet. Primary period...............11 seconds. Secondary swell..............Northwest at around 2 feet. Secondary period.............9 seconds. Water Temperature CDAS SST Analysis..........85 Degrees. Winds...............Northeast 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 2 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at around 6 feet. Primary period...............11 seconds. Secondary swell..............Northwest at around 2 feet. Secondary period.............9 seconds. Max Heat Index.........Around 96. Winds...............Northeast 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 2 feet. West facing reefs............2 to 3 feet. Swell/Period Primary swell................East at around 6 feet. Primary period...............11 seconds. Secondary swell..............North at around 2 feet. Secondary period.............14 seconds. Winds...............Northeast at around 10 mph in the evening becoming light. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.3 feet at 5:04 PM Thursday Low tide 0.4 feet at 11:38 PM Thursday High tide 1.9 feet at 5:40 AM Friday Low tide 0.7 feet at 11:23 AM Friday High tide 2.3 feet at 5:32 PM Friday Low tide 0.1 feet at 12:18 AM Saturday High tide 2.0 feet at 6:41 AM Saturday At Rota Island... High tide 2.2 feet at 5:01 PM Thursday Low tide 0.4 feet at 11:32 PM Thursday High tide 1.8 feet at 5:37 AM Friday Low tide 0.7 feet at 11:17 AM Friday High tide 2.2 feet at 5:29 PM Friday Low tide 0.1 feet at 12:12 AM Saturday High tide 1.9 feet at 6:38 AM Saturday At Tinian Island... High tide 1.7 feet at 5:02 PM Thursday Low tide 0.1 feet at 11:15 PM Thursday High tide 1.4 feet at 5:38 AM Friday Low tide 0.2 feet at 11:00 AM Friday High tide 1.7 feet at 5:30 PM Friday Low tide 0.0 feet at 11:55 PM Friday High tide 1.5 feet at 6:39 AM Saturday At Tanapag Harbor, Saipan... High tide 2.2 feet at 5:07 PM Thursday Low tide 0.4 feet at 11:34 PM Thursday High tide 1.8 feet at 5:51 AM Friday Low tide 0.8 feet at 11:21 AM Friday High tide 2.2 feet at 5:34 PM Friday Low tide 0.2 feet at 12:14 AM Saturday High tide 2.0 feet at 6:53 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. $$