FZPQ50 PGUM 081925 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU Issued by National Weather Service Honolulu HI 525 AM ChST Thu Jul 9 2026 .DISCUSSION... Typhoon Bavi will continue to leave an elevated west and secondary southwest swell in its wake as it continues moving NW away from the Marianas. A High Surf Advisory remains in effect for west and south facing reefs. There is a high risk of rip currents along north, west and south facing reefs, and a low risk of lightning at least through tonight. $$ GUZ001-MPZ001>003-091030- Guam-Rota-Tinian-Saipan- 525 AM ChST Thu Jul 9 2026 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST THIS AFTERNOON ALONG WEST AND SOUTH FACING REEFS... ...HIGH RISK OF RIP CURRENTS THROUGH FRIDAY AFTERNOON ALONG NORTH, WEST, AND SOUTH FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 AM Thursday through 600 PM Friday .TODAY... Rip Current Risk.....High *. Surf Height North facing reefs............9 to 11 feet. East facing reefs............4 to 6 feet. South facing reefs............8 to 10 feet. West facing reefs............10 to 12 feet. Swell/Period Primary swell................West at 6 to 9 feet. Primary period...............10 seconds. Secondary swell..............Southwest at around 4 feet. Secondary period.............9 seconds. Water Temperature Tanapag buoy..........83 Degrees. Winds...............East at 10 mph. .TONIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............9 to 11 feet. East facing reefs............3 to 5 feet. South facing reefs............7 to 9 feet. West facing reefs............9 to 11 feet. Swell/Period Primary swell................West at 5 to 9 feet. Primary period...............10 seconds. Secondary swell..............Southwest at around 3 feet. Secondary period.............9 seconds. Winds...............Northeast at around 10 mph. .FRIDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............6 to 8 feet. East facing reefs............3 to 5 feet. South facing reefs............7 to 9 feet. West facing reefs............7 to 9 feet. Swell/Period Primary swell................West at 4 to 8 feet. Primary period...............10 seconds. Secondary swell..............East at around 2 feet. Secondary period.............9 seconds. Winds...............Northeast at around 10 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... 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 High tide 2.7 feet at 2:17 AM Friday Low tide 0.2 feet at 9:50 AM Friday High tide 2.2 feet at 5:12 PM Friday Low tide 1.8 feet at 9:32 PM Friday At Rota Island... 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 High tide 2.5 feet at 2:14 AM Friday Low tide 0.2 feet at 9:44 AM Friday High tide 2.1 feet at 5:09 PM Friday Low tide 1.7 feet at 9:26 PM Friday At Tinian Island... 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 High tide 2.0 feet at 2:15 AM Friday Low tide 0.1 feet at 9:27 AM Friday High tide 1.6 feet at 5:10 PM Friday Low tide 0.6 feet at 9:09 PM Friday At Tanapag Harbor, Saipan... 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 High tide 2.3 feet at 2:10 AM Friday Low tide -0.1 feet at 10:02 AM Friday High tide 1.8 feet at 5:39 PM Friday Low tide 1.5 feet at 9:20 PM Friday * 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. $$