Durban - Bathers who enter the waters in KwaZulu-Natal do so at their peril as, apart from a few Durban beaches, all the shark nets have been removed ahead of the expected bad weather.KwaZulu-Natal Sharks Board spokesperson Mike Anderson-Reade said that only Durban’s beaches on the southern end of the main promenade - Addington and Ushaka - and one at Umhlanga still have nets up.The rest of the nets had been removed ahead of swells that had seen 3.5m waves pounding the shoreline on the KwaZulu-Natal south coast.Anderson-Reade said the waves were not exceptionally big and were to be expected in light of the cold front that was passing over the country.“But there is a massive groundswell and these are powerful 3.5-metre waves. You really don’t want to be swimming in them.”He said the swell was expected to dissipate by late Sunday.‘Pleasant surprise’The arrival of the swell on the KwaZulu-Natal south coast was a pleasant surprise for some locals as it heralded the arrival of the famous sardine season.“We knew the cold front was coming, so we had taken out most nets but left some at key points along the coast. As you know, usually before a front there is pleasant weather and people want to go swimming and the nets in Margate were exactly where the sardines surface.”He said that unfortunately some 14 dusky sharks had also been caught in the nets off Margate.Prior to Thursday’s sardine arrival, Anderson-Reade, said that there had been no indication along the coast that the province’s famed sardine run had started. This is usually indicated by a sighting of the increased activity of dolphins and seabirds. “We did not expect it and we don’t know where they [the sardines] have gone,” he said.He said that about 100 baskets of sardines were caught by locals in Margate.