FZPQ50 PGUM 240646 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 446 PM ChST Tue Sep 24 2024 .SYNOPSIS...A moderate risk of rip currents continues along east facing reefs with a low risk of rip currents along all other reefs. There will be a moderate risk for lightning through at least Thursday. $$ GUZ001-MPZ001>003-242300- Guam-Rota-Tinian-Saipan- 446 PM ChST Tue Sep 24 2024 36 hour Surf Zone Forecast for the Marianas from 600 PM Tuesday through 600 AM Thursday .TONIGHT (6 PM TO 6 AM WEDNESDAY)... Rip current risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Water temperature Tanapag buoy.......... 87 Degrees. Coastal Winds............West around 10 mph for Guam and Rota. Light and variable becoming east around 10 mph after midnight for Tinian and Saipan. .WEDNESDAY (6 AM TO 6 PM)... Rip current risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 3 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Maximum afternoon heat index...........Around 103. Coastal Winds............West around 10 mph for Guam and Rota. East around 10 mph for Tinian and Saipan. .WEDNESDAY NIGHT (6 PM TO 6 AM THURSDAY)... Rip current risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............3 to 5 feet. South facing reefs............2 to 4 feet. West facing reefs............Around 1 foot. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Coastal Winds............South to southwest at around 10 mph. .OUTLOOK... Some uncertainty exists in the marine forecast due to the passage of Invest 91W over the next few days. Winds are expected to remain light to moderate with occasional strong gusts possible. There will be at least a moderate risk of lightning through Friday, as convergent southerly flow behind 91W maintains increased shower and thunderstorm potential. The system is currently not expected to intensify after crossing the Marianas, but any strengthening would lead to increased seas, swells, and surf. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 1.7 feet at 7:04 PM Tuesday High tide 2.1 feet at 11:25 PM Tuesday Low tide -0.1 feet at 7:28 AM Wednesday High tide 2.2 feet at 3:41 PM Wednesday Low tide 1.7 feet at 8:44 PM Wednesday High tide 2.0 feet at 12:32 AM Thursday Low tide 0.0 feet at 8:41 AM Thursday At Rota Island... Low tide 1.6 feet at 6:58 PM Tuesday High tide 2.0 feet at 11:22 PM Tuesday Low tide -0.1 feet at 7:22 AM Wednesday High tide 2.0 feet at 3:38 PM Wednesday Low tide 1.6 feet at 8:38 PM Wednesday High tide 1.8 feet at 12:29 AM Thursday Low tide 0.0 feet at 8:35 AM Thursday At Tinian Island... Low tide 1.3 feet at 6:20 PM Tuesday High tide 1.6 feet at 10:42 PM Tuesday Low tide -0.3 feet at 7:13 AM Wednesday High tide 1.5 feet at 3:32 PM Wednesday Low tide 1.3 feet at 7:49 PM Wednesday High tide 1.5 feet at 11:43 PM Wednesday Low tide -0.3 feet at 8:20 AM Thursday At Tanapag Harbor, Saipan... Low tide 1.7 feet at 7:20 PM Tuesday High tide 1.9 feet at 11:28 PM Tuesday Low tide -0.1 feet at 7:40 AM Wednesday High tide 2.1 feet at 4:01 PM Wednesday Low tide 1.7 feet at 9:03 PM Wednesday High tide 1.8 feet at 12:29 AM Thursday Low tide 0.0 feet at 8:52 AM 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. If caught in a rip current, swim parallel to the beach rather than against the current. $$