FZPQ50 PGUM 160624 SRFGUM Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 424 PM ChST Mon Mar 16 2026 .DISCUSSION...Long period north to northwest swell from a low pressure system east of Japan and long-period northeast swell from a strong Kona Low northwest of Hawai'i continue to produce dangerous surf and a high risk of rip currents along west, north, and east facing reefs. The main concern will be north facing reefs, where surf can continue reach up to 17 feet early Tuesday morning. Hazardous surf of at least 9 feet along west and north facing reefs and of at least 12 feet along east facing reefs is expected to persist longer, so an Advisory was issued for when the surf is expected to fall below the 15 ft threshold. A moderate risk of rip currents continues along south facing reefs over the next several days. Coastal inundation along northern shorelines could reach 1 to 3 feet through tonight. $$ GUZ001-MPZ001>003-162200- Guam-Rota-Tinian-Saipan- 424 PM ChST Mon Mar 16 2026 ...HIGH SURF WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING ALONG WEST, NORTH AND EAST FACING REEFS... ...COASTAL FLOOD WATCH IN EFFECT THROUGH EARLY TUESDAY MORNING ALONG NORTH FACING SHORES... ...HIGH RISK OF RIP CURRENTS THROUGH WEDNESDAY AFTERNOON ALONG WEST, NORTH AND EAST FACING REEFS... ...HIGH SURF ADVISORY IN EFFECT FROM EARLY TUESDAY MORNING TO 4 PM CHST WEDNESDAY ALONG WEST, NORTH AND EAST FACING REEFS... 36 hour Surf Zone Forecast for the Marianas from 600 PM Monday through 600 AM Wednesday .TONIGHT... Rip Current Risk.....High. Huge waves will produce deadly rip currents. Stay out of the water. Surf Height North facing reefs............14 to 17 feet. East facing reefs............10 to 14 feet. South facing reefs............5 to 7 feet. West facing reefs............8 to 11 feet. Swell/Period Primary swell................North at 11 to 14 feet. Primary period...............13 seconds. Secondary swell..............Northeast at around 5 feet. Secondary period.............14 seconds. Water Temperature Ipan buoy..........82 Degrees. Winds...............Northeast at 10 to 15 mph. .TUESDAY... Rip Current Risk.....High. Pounding surf will produce life threatening rip currents at reefs and beaches. Surf Height North facing reefs............10 to 14 feet. East facing reefs............10 to 12 feet. South facing reefs............5 to 7 feet. West facing reefs............7 to 9 feet. Swell/Period Primary swell................North at 7 to 11 feet. Primary period...............13 seconds. Secondary swell..............Northeast at around 4 feet. Secondary period.............15 seconds. Winds...............Northeast at 10 to 15 mph. .TUESDAY NIGHT... Rip Current Risk.....High *. Surf Height North facing reefs............9 to 11 feet. East facing reefs............9 to 11 feet. South facing reefs............4 to 6 feet. West facing reefs............6 to 8 feet. Swell/Period Primary swell................Northeast at 5 to 9 feet. Primary period...............12 seconds. Secondary swell..............Northeast at around 4 feet. Secondary period.............14 seconds. Winds...............Northeast at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.0 feet at 12:20 AM Tuesday High tide 2.2 feet at 7:12 AM Tuesday Low tide 1.1 feet at 12:49 PM Tuesday High tide 2.2 feet at 6:18 PM Tuesday Low tide 0.0 feet at 12:59 AM Wednesday High tide 2.3 feet at 7:33 AM Wednesday At Rota Island... Low tide 0.0 feet at 12:14 AM Tuesday High tide 2.1 feet at 7:09 AM Tuesday Low tide 1.0 feet at 12:43 PM Tuesday High tide 2.1 feet at 6:15 PM Tuesday Low tide 0.0 feet at 12:53 AM Wednesday High tide 2.1 feet at 7:30 AM Wednesday At Tinian Island... Low tide 0.0 feet at 11:57 PM Monday High tide 1.6 feet at 7:10 AM Tuesday Low tide 0.3 feet at 12:26 PM Tuesday High tide 1.6 feet at 6:16 PM Tuesday Low tide 0.0 feet at 12:36 AM Wednesday High tide 1.7 feet at 7:31 AM Wednesday At Tanapag Harbor, Saipan... Low tide 0.0 feet at 12:17 AM Tuesday High tide 2.1 feet at 7:18 AM Tuesday Low tide 1.1 feet at 12:44 PM Tuesday High tide 2.0 feet at 6:23 PM Tuesday Low tide 0.1 feet at 12:58 AM Wednesday High tide 2.1 feet at 7:40 AM Wednesday * 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. $$