Active Weather Alerts
Small Craft Advisory
Issued: 6:30 AM Mar. 17, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... * WHAT...Seas 9 to 12 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 4 PM ChST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Recent altimetry passes reveal combined sea heights around 11 to 12 feet to the west of Marianas coastal waters. Seas remain elevated due to large north to northwest swell from a low pressure system east of Japan as well as northeast swell from a strong Kona Low north-northwest of Hawai'i. Sea heights are gradually relaxing. Seas may fall below levels hazardous to small craft (10 feet) on Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions. &&
Coastal Flood Watch
Issued: 6:01 AM Mar. 17, 2026 – National Weather Service
...COASTAL FLOOD WATCH NOW IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... ...HIGH SURF WARNING WILL EXPIRE AT 4 PM CHST THIS AFTERNOON... * WHAT...Large breaking waves of 10 to 12 feet. Dangerous rip currents. Possible coastal inundation along northern shorelines especially during high tides. Reduced wave heights have allowed for the High Surf Warning to expire. * WHERE...For High Surf Advisory and Coastal flood Watch along North reefs and shore and for the High Risk of Rip Currents north and east facing reefs of Guam, Rota, Tinian and Saipan. * WHEN...Until 4 PM ChST Wednesday. * IMPACTS...A few roads may be closed. Low lying property may be inundated. Some shoreline erosion may occur. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life-threatening swimming conditions and significant beach erosion can be expected. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Long period NNW swell from a low pressure system near Japan and long-period NE swell from a Kona Low northwest of Hawai'i continue to produce hazardous surf and a high risk of rip currents along north and east facing reefs. Hazardous surf of at least 9 feet along north reefs will continue through at least Wednesday afternoon. Surf has already fallen below hazardous levels of 9 feet along west and 12 feet along east facing reefs. Coastal inundation along northern shorelines of 1 to 2 feet is possible through Wednesday afternoon especially during high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
High Surf Advisory
Issued: 6:01 AM Mar. 17, 2026 – National Weather Service
...COASTAL FLOOD WATCH NOW IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... ...HIGH SURF WARNING WILL EXPIRE AT 4 PM CHST THIS AFTERNOON... * WHAT...Large breaking waves of 10 to 12 feet. Dangerous rip currents. Possible coastal inundation along northern shorelines especially during high tides. Reduced wave heights have allowed for the High Surf Warning to expire. * WHERE...For High Surf Advisory and Coastal flood Watch along North reefs and shore and for the High Risk of Rip Currents north and east facing reefs of Guam, Rota, Tinian and Saipan. * WHEN...Until 4 PM ChST Wednesday. * IMPACTS...A few roads may be closed. Low lying property may be inundated. Some shoreline erosion may occur. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life-threatening swimming conditions and significant beach erosion can be expected. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Long period NNW swell from a low pressure system near Japan and long-period NE swell from a Kona Low northwest of Hawai'i continue to produce hazardous surf and a high risk of rip currents along north and east facing reefs. Hazardous surf of at least 9 feet along north reefs will continue through at least Wednesday afternoon. Surf has already fallen below hazardous levels of 9 feet along west and 12 feet along east facing reefs. Coastal inundation along northern shorelines of 1 to 2 feet is possible through Wednesday afternoon especially during high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
Rip Current Statement
Issued: 6:01 AM Mar. 17, 2026 – National Weather Service
...COASTAL FLOOD WATCH NOW IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH WEDNESDAY AFTERNOON... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... ...HIGH SURF WARNING WILL EXPIRE AT 4 PM CHST THIS AFTERNOON... * WHAT...Large breaking waves of 10 to 12 feet. Dangerous rip currents. Possible coastal inundation along northern shorelines especially during high tides. Reduced wave heights have allowed for the High Surf Warning to expire. * WHERE...For High Surf Advisory and Coastal flood Watch along North reefs and shore and for the High Risk of Rip Currents north and east facing reefs of Guam, Rota, Tinian and Saipan. * WHEN...Until 4 PM ChST Wednesday. * IMPACTS...A few roads may be closed. Low lying property may be inundated. Some shoreline erosion may occur. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life-threatening swimming conditions and significant beach erosion can be expected. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Long period NNW swell from a low pressure system near Japan and long-period NE swell from a Kona Low northwest of Hawai'i continue to produce hazardous surf and a high risk of rip currents along north and east facing reefs. Hazardous surf of at least 9 feet along north reefs will continue through at least Wednesday afternoon. Surf has already fallen below hazardous levels of 9 feet along west and 12 feet along east facing reefs. Coastal inundation along northern shorelines of 1 to 2 feet is possible through Wednesday afternoon especially during high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
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