A man and a woman have been injured in separate leisure-activity related incidents at Bushman's River near Port Alfred and on the Kabeljous River near Jeffrey's Bay.
The NSRI's Craig Lambinon says both incidents happened on New Year's eve.
In the Bushman's River incident, the NSRI Port Alfred duty crew was activated to respond to the Bushman's River where a 20 year old man had suffered injuries while skiing.
On arrival on the scene, six kilometres upstream they found the man on holiday from Limpopo, on the shore.
He was medically treated and secured to a stretcher and brought back downstream aboard the NSRI's sea rescue craft.
He was then transported to hospital by Guardmed ambulance in a stable condition.
Meanwhile: an NSRI Jeffreys Bay duty crew and Guardmed ambulance services responded to a waterfall on the Kabeljous River where a 33-year-old woman now living in the Netherlands, sustained an injury.
She was secured to a stretcher and hiked to a waiting ambulance and transported to hospital - also in a stable condition.