Rip currents are silent killers. These fast-moving channels of water can reach speeds of 1 to 2 feet per second, but have been measured as high as 8 feet per second.

Thrill-seeking surfers tackled massive waves at Bondi Beach, Sydney, on April 1. Dramatic footage captured the daredevils ...

Swells can travel thousands of kilometres and may still be present even if the local wind is calm. It’s estimated that up to ...