FZPQ50 PGUM 071938 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 538 AM ChST Wed Jul 8 2026 .DISCUSSION... Super Typhoon Bavi (09W) and the trailing monsoon surge will keep producing significant swells that will continue to pummel the Marianas. Dangerous surf heights of up to 16 feet and coastal inundation of 1 to 2 feet can be expected now through late this afternoon, especially along west-facing shores. As Bavi continues to pull away and the leading monsoon surge weakens, swells and associated surf will gradually diminish, potentially dropping below dangerous levels by Thursday. Even so, surf will remain elevated enough to continue to produce high risk of rip currents along south, west and north facing reefs the next few days, while dropping to moderate along north reefs Thursday. $$ GUZ001-MPZ001>003-080800- Guam-Rota-Tinian-Saipan- 538 AM ChST Wed Jul 8 2026 ...HIGH RIP CURRENT RISK IN EFFECT THROUGH FRIDAY AFTERNOON ALONG SOUTH, WEST AND NORTH FACING REEFS... ...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL 4 PM CHST WEDNESDAY ALONG SOUTH AND WEST FACING REEFS... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 4 PM CHST THURSDAY ALONG SOUTH AND WEST FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 AM Wednesday through 600 PM Thursday .TODAY... Rip Current Risk.....High. Pounding surf will produce life threatening rip currents at reefs and beaches. Surf Height North facing reefs............6 to 9 feet. East facing reefs............6 to 8 feet. South facing reefs............14 to 16 feet. West facing reefs............14 to 16 feet. Swell/Period Primary swell................West at 7 to 10 feet. Primary period...............10 seconds. Secondary swell..............Southwest at around 6 feet. Secondary period.............9 seconds. Water Temperature Tanapag buoy..........84 Degrees. Max Heat Index.........Around 99. Winds...............Breezy. South at 15 to 25 mph with occasional gusts to 35 mph. .TONIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............6 to 9 feet. East facing reefs............5 to 7 feet. South facing reefs............8 to 11 feet. West facing reefs............9 to 11 feet. Swell/Period Primary swell................West at 5 to 8 feet. Primary period...............10 seconds. Secondary swell..............Southwest at around 6 feet. Secondary period.............9 seconds. Winds...............South at 10 to 20 mph becoming southeast 10 mph after midnight. .THURSDAY... Rip Current Risk.....High *. Surf Height North facing reefs............5 to 8 feet. East facing reefs............5 to 7 feet. South facing reefs............7 to 10 feet. West facing reefs............8 to 10 feet. Swell/Period Primary swell................West at 5 to 7 feet. Primary period...............10 seconds. Secondary swell..............Southwest at around 5 feet. Secondary period.............9 seconds. Max Heat Index.........Around 101. Winds...............East to southeast 5 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.9 feet at 7:59 AM Wednesday High tide 2.0 feet at 1:52 PM Wednesday Low tide 1.2 feet at 7:18 PM Wednesday High tide 2.6 feet at 1:37 AM Thursday Low tide 0.5 feet at 8:54 AM Thursday High tide 2.1 feet at 3:36 PM Thursday Low tide 1.5 feet at 8:20 PM Thursday At Rota Island... Low tide 0.8 feet at 7:53 AM Wednesday High tide 1.9 feet at 1:49 PM Wednesday Low tide 1.2 feet at 7:12 PM Wednesday High tide 2.5 feet at 1:34 AM Thursday Low tide 0.5 feet at 8:48 AM Thursday High tide 1.9 feet at 3:33 PM Thursday Low tide 1.5 feet at 8:14 PM Thursday At Tinian Island... Low tide 0.3 feet at 7:36 AM Wednesday High tide 1.5 feet at 1:50 PM Wednesday Low tide 0.4 feet at 6:55 PM Wednesday High tide 2.0 feet at 1:35 AM Thursday Low tide 0.2 feet at 8:31 AM Thursday High tide 1.5 feet at 3:34 PM Thursday Low tide 0.5 feet at 7:57 PM Thursday At Tanapag Harbor, Saipan... Low tide 0.6 feet at 8:20 AM Wednesday High tide 1.5 feet at 2:01 PM Wednesday Low tide 0.9 feet at 7:15 PM Wednesday High tide 2.3 feet at 1:40 AM Thursday Low tide 0.2 feet at 9:11 AM Thursday High tide 1.6 feet at 4:03 PM Thursday Low tide 1.2 feet at 8:11 PM Thursday * 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. $$