A Kayaker has yelled obscenities at anglers after their fishing lines capsized his watercraft.

The kayaker was paddling in one of Sydney's busy waterways when the fishing lines cast by a pair of fisherman caught around the back of his kayak, causing it to capsize.

As the kayaker was reeled towards to water's edge by the fishing line, he yelled obscenities at the anglers as they looked on.

“I told you I was coming into range,” the kayaker yelled. “I can't get [the line] off. You'll have to f**king cut it off!”

Adam Bailey and a friend who cast the fishing lines laughed at the outburst and quickly cut the line loose to free the kayak, letting the paddler to get away.

Mr Bailey, who works on a fishing charter, told Daily Mail Australia the kayaker was the third to cross the pair's lines on that day.

“We have our lines pretty close to us with a float in the water. These kayakers come very close to us. We don’t intentionally do it,” he said.

Bailey told the outlet that similar incidents occur “pretty regularly” in the harbour because kayakers came too close to areas where people fish. He urged them to be more careful as anglers “cannot move out of the way for them”.

“They’ve got a lot more space to avoid our lines,” he said.

In New South Wales, a license is not required to paddle a kayak, but a government website warns Sydney Harbour “is an extremely busy waterway”.

NSW Maritime advises kayakers to “use [their] eyes and ears to keep a good lookout,” when paddling in Sydney's popular waterways.