FZPQ50 PGUM 190725 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 525 PM ChST Thu Mar 19 2026 .DISCUSSION...Elevated long-period north to northeast swell, produced by distant low pressure systems, will continue to produce hazardous surf along north facing reefs, and a high risk of rip currents along north and east facing reefs through at least Friday afternoon. Looking ahead, swells look to decrease by next week. However, the surf is expected to remain around the 9 foot level and is anticipated to fluctuate by a foot or so for the next several days. Surfers and beach goers should exercise caution over the next several days. $$ GUZ001-MPZ001>003-192300- Guam-Rota-Tinian-Saipan- 525 PM ChST Thu Mar 19 2026 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST FRIDAY ALONG NORTH FACING REEFS... ...HIGH RISK OF RIP CURRENTS THROUGH FRIDAY AFTERNOON ALONG NORTH AND EAST FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 PM Thursday through 600 AM Saturday .TONIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............8 to 11 feet. East facing reefs............8 to 10 feet. South facing reefs............3 to 5 feet. West facing reefs............3 to 5 feet. Swell/Period Primary swell................North at 6 to 8 feet. Primary period...............12 seconds. Secondary swell..............Northeast at around 3 feet. Secondary period.............14 seconds. Water Temperature Ipan buoy..........82 Degrees. Winds...............Northeast at 15 to 20 mph. .FRIDAY... Rip Current Risk.....High *. Surf Height North facing reefs............8 to 11 feet. East facing reefs............8 to 10 feet. South facing reefs............5 to 7 feet. West facing reefs............4 to 6 feet. Swell/Period Primary swell................North at 6 to 8 feet. Primary period...............11 seconds. Secondary swell..............Northeast at around 4 feet. Secondary period.............13 seconds. Max Heat Index.........Around 91. Winds...............Northeast at 10 to 20 mph. .FRIDAY NIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............8 to 10 feet. East facing reefs............8 to 10 feet. South facing reefs............5 to 7 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 3 to 5 feet. Secondary period.............13 seconds. Winds...............Northeast at 10 to 20 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... High tide 2.4 feet at 7:57 PM Thursday Low tide 0.4 feet at 2:16 AM Friday High tide 2.4 feet at 8:18 AM Friday Low tide 0.3 feet at 2:41 PM Friday High tide 2.4 feet at 8:49 PM Friday Low tide 0.6 feet at 2:56 AM Saturday At Rota Island... High tide 2.2 feet at 7:54 PM Thursday Low tide 0.3 feet at 2:10 AM Friday High tide 2.2 feet at 8:15 AM Friday Low tide 0.3 feet at 2:35 PM Friday High tide 2.2 feet at 8:46 PM Friday Low tide 0.6 feet at 2:50 AM Saturday At Tinian Island... High tide 1.8 feet at 7:55 PM Thursday Low tide 0.1 feet at 1:53 AM Friday High tide 1.8 feet at 8:16 AM Friday Low tide 0.1 feet at 2:18 PM Friday High tide 1.8 feet at 8:47 PM Friday Low tide 0.2 feet at 2:33 AM Saturday At Tanapag Harbor, Saipan... High tide 2.1 feet at 8:08 PM Thursday Low tide 0.4 feet at 2:19 AM Friday High tide 2.1 feet at 8:23 AM Friday Low tide 0.3 feet at 2:42 PM Friday High tide 2.1 feet at 9:03 PM Friday Low tide 0.7 feet at 2:59 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. Rip currents will be life threatening. If caught in a rip current, swim parallel to the beach rather than against the current. $$