Surf Forecast
Issued by NWS Tiyan, Guam

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
298 FZPQ50 PGUM 121846 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 446 AM ChST Sun Jul 13 2025 .DISCUSSION...There will be a moderate risk of rip currents along east facing reefs of the Marianas through at least Tuesday. On Tuesday, a moderate risk will likely commence along south and west facing reefs. There will also be a moderate risk of lightning this week, except on Tuesday it could take a pause. $$ GUZ001-MPZ001>003-131000- Guam-Rota-Tinian-Saipan- 446 AM ChST Sun Jul 13 2025 36 hour Surf Zone Forecast for the Marianas from 600 AM Sunday through 600 PM Monday .TODAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............4 to 6 feet. South facing reefs............4 to 6 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Secondary swell..............Southwest at 1 to 2 feet. Secondary period.............8 seconds. Water Temperature Ritidian buoy..........86 Degrees. Max Heat Index.........Around 99. Winds...............Southeast at 10 to 15 mph. .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............4 to 6 feet. South facing reefs............4 to 6 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Secondary swell..............Southwest at around 2 feet. Secondary period.............8 seconds. Winds...............Southeast at 10 to 15 mph. .MONDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............2 to 4 feet. East facing reefs............4 to 6 feet. South facing reefs............4 to 6 feet. West facing reefs............2 to 4 feet. Swell/Period Primary swell................East at 2 to 4 feet. Primary period...............8 seconds. Secondary swell..............West at around 2 feet. Secondary period.............8 seconds. Max Heat Index.........Around 99. Winds...............Southeast at around 10 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.5 feet at 8:05 AM Sunday Low tide -0.2 feet at 3:27 PM Sunday High tide 2.6 feet at 10:40 PM Sunday Low tide 1.8 feet at 4:08 AM Monday High tide 2.5 feet at 8:52 AM Monday Low tide 0.0 feet at 4:06 PM Monday High tide 2.6 feet at 11:11 PM Monday At Rota Island... High tide 2.4 feet at 8:02 AM Sunday Low tide -0.2 feet at 3:21 PM Sunday High tide 2.4 feet at 10:37 PM Sunday Low tide 1.7 feet at 4:02 AM Monday High tide 2.4 feet at 8:49 AM Monday Low tide 0.0 feet at 4:00 PM Monday High tide 2.5 feet at 11:08 PM Monday At Tinian Island... High tide 1.8 feet at 7:00 AM Sunday Low tide -0.3 feet at 3:04 PM Sunday High tide 1.7 feet at 10:44 PM Sunday Low tide 1.4 feet at 3:32 AM Monday High tide 1.7 feet at 7:52 AM Monday Low tide -0.2 feet at 3:41 PM Monday High tide 1.7 feet at 11:05 PM Monday At Tanapag Harbor, Saipan... High tide 2.1 feet at 7:54 AM Sunday Low tide -0.4 feet at 3:36 PM Sunday High tide 2.3 feet at 11:16 PM Sunday Low tide 1.6 feet at 4:28 AM Monday High tide 2.0 feet at 8:47 AM Monday Low tide -0.3 feet at 4:14 PM Monday High tide 2.3 feet at 11:43 PM Monday * 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. $$