


Surf Forecast
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
853 FZPQ50 PGUM 081703 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 303 AM ChST Thu Oct 9 2025 .DISCUSSION...There will be a moderate risk of rip currents along east facing reefs and beaches, with a low risk elsewhere. A long- period north swell from distant Typhoon Halong will increase surf along north facing reefs and beaches, with a moderate risk of rip currents by Saturday. There will also be a moderate risk of lightning the next few days. $$ GUZ001-MPZ001>003-090700- Guam-Rota-Tinian-Saipan- 303 AM ChST Thu Oct 9 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............2 to 4 feet. East facing reefs............3 to 5 feet. South facing reefs............2 to 4 feet. West facing reefs............1 to 3 feet. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............8 seconds. Water Temperature Ritidian buoy..........86 Degrees. Max Heat Index.........Around 100. Winds...............Northeast at around 10 mph. .TONIGHT... 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............1 to 3 feet. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............8 seconds. Winds...............Northeast at 10 to 15 mph. .FRIDAY... 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............1 to 3 feet. Swell/Period Primary swell................East at 3 to 4 feet. Primary period...............8 seconds. Max Heat Index.........Around 101. Winds...............Northeast at around 10 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.5 feet at 9:16 AM Thursday Low tide 1.1 feet at 2:59 PM Thursday High tide 2.5 feet at 8:21 PM Thursday Low tide -0.5 feet at 3:24 AM Friday High tide 2.5 feet at 10:19 AM Friday Low tide 1.4 feet at 3:49 PM Friday At Rota Island... High tide 2.4 feet at 9:13 AM Thursday Low tide 1.0 feet at 2:53 PM Thursday High tide 2.4 feet at 8:18 PM Thursday Low tide -0.4 feet at 3:18 AM Friday High tide 2.3 feet at 10:16 AM Friday Low tide 1.3 feet at 3:43 PM Friday At Tinian Island... High tide 1.6 feet at 9:04 AM Thursday Low tide 0.9 feet at 2:17 PM Thursday High tide 1.8 feet at 7:36 PM Thursday Low tide -0.4 feet at 3:07 AM Friday High tide 1.6 feet at 10:20 AM Friday Low tide 1.1 feet at 3:08 PM Friday At Tanapag Harbor, Saipan... High tide 2.3 feet at 9:37 AM Thursday Low tide 1.1 feet at 3:09 PM Thursday High tide 2.2 feet at 8:25 PM Thursday Low tide -0.4 feet at 3:30 AM Friday High tide 2.3 feet at 10:45 AM Friday Low tide 1.4 feet at 3:58 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. $$