FZPQ50 PGUM 090616 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 416 PM ChST Thu Jan 9 2025 .SYNOPSIS...There is a moderate risk of rip currents along all reefs through tonight, spreading to west facing reefs by Friday with the arrival of north to northwesterly swell. Risk of rip currents may become high for east facing reefs Friday. $$ GUZ001-MPZ001>003-092200- Guam-Rota-Tinian-Saipan- 416 PM ChST Thu Jan 9 2025 36 hour Surf Zone Forecast for the Marianas from 600 PM Thursday through 600 AM Saturday .TONIGHT (6 PM TO 6 AM FRIDAY)... Rip current risk.....Moderate *. Surf Height North facing reefs............4 to 6 feet. East facing reefs............6 to 8 feet. South facing reefs............3 to 5 feet. West facing reefs............3 to 5 feet. Swell/Period Primary swell................Northeast at 4 to 6 feet. Primary period...............8 seconds. Secondary swell..............North at around 3 feet. Secondary period.............14 seconds. Water temperature Ritidian buoy.......... 84 Degrees. Coastal Winds............East at 10 to 20 mph. .FRIDAY (6 AM TO 6 PM)... Rip current risk.....Moderate *. Surf Height North facing reefs............4 to 6 feet. East facing reefs............6 to 8 feet. South facing reefs............3 to 5 feet. West facing reefs............4 to 6 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............9 seconds. Secondary swell..............Northwest at around 3 feet. Secondary period.............13 seconds. Maximum afternoon heat index...........Around 100. Coastal Winds............East at 10 to 20 mph. .FRIDAY NIGHT (6 PM TO 6 AM SATURDAY)... Rip current risk.....Moderate *. Surf Height North facing reefs............4 to 6 feet. East facing reefs............5 to 7 feet. South facing reefs............3 to 5 feet. West facing reefs............4 to 6 feet. Swell/Period Primary swell................East at 4 to 6 feet. Primary period...............9 seconds. Secondary swell..............Northwest at around 3 feet. Secondary period.............10 seconds. Coastal Winds............East at 10 to 15 mph. .OUTLOOK...A pulse of increased northerly swell will arrive late in the weekend as the trade swell strengthens, contributing to higher seas and surf into early next week. This may bring a high risk of rip currents for north and east facing reefs. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide -0.4 feet at 10:26 PM Thursday High tide 1.8 feet at 5:57 AM Friday Low tide 1.4 feet at 10:13 AM Friday High tide 2.2 feet at 3:32 PM Friday Low tide -0.7 feet at 11:21 PM Friday High tide 2.0 feet at 7:00 AM Saturday At Rota Island... Low tide -0.4 feet at 10:20 PM Thursday High tide 1.7 feet at 5:54 AM Friday Low tide 1.3 feet at 10:07 AM Friday High tide 2.1 feet at 3:29 PM Friday Low tide -0.6 feet at 11:15 PM Friday High tide 1.9 feet at 6:57 AM Saturday At Tinian Island... Low tide -0.2 feet at 10:01 PM Thursday High tide 1.4 feet at 5:41 AM Friday Low tide 1.3 feet at 8:52 AM Friday High tide 2.0 feet at 2:38 PM Friday Low tide -0.4 feet at 10:53 PM Friday High tide 1.5 feet at 6:54 AM Saturday At Tanapag Harbor, Saipan... Low tide -0.2 feet at 10:33 PM Thursday High tide 2.0 feet at 6:16 AM Friday Low tide 1.6 feet at 10:19 AM Friday High tide 2.3 feet at 3:27 PM Friday Low tide -0.5 feet at 11:23 PM Friday High tide 2.2 feet at 7:14 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. If caught in a rip current, swim parallel to the beach rather than against the current. $$