The RNLI said lifeguards in Perranporth had rescued a surfer who had been swept outside the black and white flagged area.
The surfer had been brought safely on board the rescue boat and safely returned to shore.
On Tuesday lifeguards had received a call from the coastguard with reports of a kayaker in difficulty off the same beach.
The RNLI said the team had spotted a surf ski through the waves about 2,624 ft (800m) offshore.
It said lifeguards had found it difficult to see the surf ski and its user as they had blended into the the white water and breaking waves.
“The casualty was found clinging to the surf ski in the water, using the equipment to stay afloat,” a RNLI spokesperson added.
The casualty was helped on to the rescue boat and safely brought to shore.
On Wednesday the RNLI said lifeguards at Perranporth had rescued a young bodyboarder who had been struggling in the large waves.
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