FZPQ50 PGUM 191822 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 422 AM ChST Thu Feb 20 2025 .SYNOPSIS...A moderate risk of rip currents is expected to continue for north, east, and west facing reefs through at least Thursday night. $$ GUZ001-MPZ001>003-201000- Guam-Rota-Tinian-Saipan- 422 AM ChST Thu Feb 20 2025 36 hour Surf Zone Forecast for the Marianas from 600 AM Thursday through 600 PM Friday .TODAY... Rip current risk.....Moderate *. Surf Height North facing reefs............5 to 7 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............4 to 6 feet. Swell/Period Primary swell................North at 3 to 5 feet. Primary period...............10 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............13 seconds. Water temperature Ritidian buoy.......... 83 Degrees. Maximum Afternoon Heat index.........Around 96. Coastal Winds...............Breezy. Northeast at 15 to 25 mph. .TONIGHT... Rip current risk.....Moderate *. Surf Height North facing reefs............6 to 8 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............5 to 7 feet. Swell/Period Primary swell................North at 4 to 6 feet. Primary period...............10 seconds. Secondary swell..............Northwest at around 4 feet. Secondary period.............11 seconds. Coastal Winds...............Northeast at 15 to 20 mph. .FRIDAY... Rip current risk.....Moderate *. Surf Height North facing reefs............6 to 8 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............6 to 8 feet. Swell/Period Primary swell................North at 4 to 6 feet. Primary period...............10 seconds. Secondary swell..............North at around 4 to 5 feet. Secondary period.............11 seconds. Maximum Afternoon Heat index.........Around 94. Coastal Winds...............Northeast at 15 to 20 mph. .OUTLOOK...Swells and corresponding surf will continue to increase for Friday through the weekend, as a trade wind surge builds across the region. Increasing north and trade swells may bring hazardous surf to north facing reefs, and a high risk of rip currents to north and eastfacing reefs by this weekend through early next week. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 1.2 feet at 5:57 AM Thursday High tide 1.9 feet at 11:43 AM Thursday Low tide 0.2 feet at 7:22 PM Thursday High tide 1.5 feet at 3:04 AM Friday Low tide 1.4 feet at 6:54 AM Friday High tide 1.8 feet at 12:21 PM Friday At Rota Island... Low tide 1.1 feet at 5:51 AM Thursday High tide 1.8 feet at 11:40 AM Thursday Low tide 0.2 feet at 7:16 PM Thursday High tide 1.4 feet at 3:01 AM Friday Low tide 1.3 feet at 6:48 AM Friday High tide 1.7 feet at 12:18 PM Friday At Tinian Island... Low tide 1.2 feet at 5:26 AM Thursday High tide 1.6 feet at 11:16 AM Thursday Low tide 0.3 feet at 7:26 PM Thursday High tide 1.4 feet at 3:23 AM Friday Low tide 1.3 feet at 6:12 AM Friday High tide 1.7 feet at 11:52 AM Friday At Tanapag Harbor, Saipan... Low tide 1.4 feet at 5:34 AM Thursday High tide 1.9 feet at 11:43 AM Thursday Low tide 0.4 feet at 7:43 PM Thursday High tide 1.6 feet at 4:27 AM Friday Low tide 1.6 feet at 6:40 AM Friday High tide 1.9 feet at 12:15 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. If caught in a rip current, swim parallel to the beach rather than against the current. $$