FZPQ50 PGUM 051849 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 449 AM ChST Thu Aug 6 2026 .DISCUSSION...Hazardous surf is expected to continue along west and north facing reefs of the Marianas, in addition to the high rip current risk along west, north, and east facing reefs. A moderate risk of lightning is expected for the rest of the week. $$ GUZ001-MPZ001>003-060800- Guam-Rota-Tinian-Saipan- 449 AM ChST Thu Aug 6 2026 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST SATURDAY ALONG WEST AND NORTH FACING REEFS... ...HIGH RIP CURRENT RISK REMAINS THROUGH SATURDAY AFTERNOON ALONG WEST, NORTH, AND EAST FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 AM Thursday through 600 PM Friday .TODAY... Rip Current Risk.....High. Pounding surf will produce life threatening rip currents at reefs and beaches. Surf Height North facing reefs............9 to 11 feet. East facing reefs............7 to 9 feet. South facing reefs............5 to 7 feet. West facing reefs............10 to 12 feet. Swell/Period Primary swell................West at 6 to 8 feet. Primary period...............11 seconds. Secondary swell..............Northwest at 4 to 6 feet. Secondary period.............14 seconds. Water Temperature Tanapag buoy..........86 Degrees. Max Heat Index.........Around 102. Winds...............West at 10 to 20 mph. .TONIGHT... Rip Current Risk.....High. Pounding surf will produce life threatening rip currents at reefs and beaches. Surf Height North facing reefs............9 to 11 feet. East facing reefs............7 to 9 feet. South facing reefs............5 to 7 feet. West facing reefs............10 to 12 feet. Swell/Period Primary swell................West at 6 to 8 feet. Primary period...............11 seconds. Secondary swell..............Northwest at 4 to 6 feet. Secondary period.............14 seconds. Winds...............West at 10 to 20 mph. .FRIDAY... Rip Current Risk.....High. Huge waves will produce deadly rip currents. Stay out of the water. Surf Height North facing reefs............9 to 11 feet. East facing reefs............7 to 9 feet. South facing reefs............5 to 7 feet. West facing reefs............10 to 12 feet. Swell/Period Primary swell................West at 6 to 8 feet. Primary period...............11 seconds. Secondary swell..............Northwest at 4 to 6 feet. Secondary period.............14 seconds. Max Heat Index.........Around 102. Winds...............West at 10 to 20 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.5 feet at 7:17 AM Thursday High tide 2.0 feet at 2:01 PM Thursday Low tide 1.6 feet at 6:53 PM Thursday High tide 2.5 feet at 12:42 AM Friday Low tide 0.2 feet at 8:20 AM Friday High tide 2.1 feet at 3:50 PM Friday Low tide 1.8 feet at 8:05 PM Friday At Rota Island... Low tide 0.4 feet at 7:11 AM Thursday High tide 1.9 feet at 1:58 PM Thursday Low tide 1.5 feet at 6:47 PM Thursday High tide 2.4 feet at 12:39 AM Friday Low tide 0.2 feet at 8:14 AM Friday High tide 2.0 feet at 3:47 PM Friday Low tide 1.7 feet at 7:59 PM Friday At Tinian Island... Low tide 0.2 feet at 6:54 AM Thursday High tide 1.5 feet at 1:59 PM Thursday Low tide 0.5 feet at 6:30 PM Thursday High tide 1.9 feet at 12:40 AM Friday Low tide 0.1 feet at 7:57 AM Friday High tide 1.6 feet at 3:48 PM Friday Low tide 0.6 feet at 7:42 PM Friday At Tanapag Harbor, Saipan... Low tide 0.3 feet at 7:35 AM Thursday High tide 1.6 feet at 2:18 PM Thursday Low tide 1.3 feet at 6:49 PM Thursday High tide 2.2 feet at 12:45 AM Friday Low tide 0.0 feet at 8:35 AM Friday High tide 1.7 feet at 4:23 PM Friday Low tide 1.5 feet at 7:53 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. $$