The charity said 170 people had been rescued from Wells beach in the past five years, of which 100 had been cut off by the channel that forms up to four hours before high tide.
“We will miss her forever,” they said.The coastguard helicopter took part in the search, along with RNLI crews and police dive teams from Avon and Somerset.
More than 30 boats from Parkstone Yacht Club also helped with the efforts.Ms Sherwin's family thanked those who tried to find her."The search operation was a testimony to the impact she had upon everyone she met and the love we all share for her," the family said.
Det Ch Insp Rachel Vallins, of Dorset Police, said emergency services had "worked tirelessly".“Officers are continuing to keep the family fully updated and our thoughts are with all of Emily’s loved ones at this extremely difficult time," she said.
“With our partner agencies we have carried out extensive searches in the area where Emily had dived over recent days, but unfortunately we have been unable to locate her at this time.
“While the dive search activity has now ceased, we will continue to carry out enquiries and remain committed to exploring every available line of enquiry to locate Emily."Mr Kleinhaus has come under scrutiny for antisemitic posts on social media, which have since been deleted.
Discussing one of these, he says he copied and pasted someone else's thoughts, and that he was being administered morphine as part of medical treatment at the time - though he admits this was not an excuse.The 2023 post was made in a moment of anger, he adds, after he saw a video - not verified by the BBC - which purported to show some Jews spitting at Christians in Israel.
Mr Kleinhaus insists the comments were specific to one moment, and not a wider comment about Jewish people. "Even now, if I see any person going against my religion, I will speak up against it," he said.The US government is facing questions about the vetting process for those being resettled. The UN's refugee agency told the BBC it was not involved in the screening process for the Afrikaners as it normally would be for refugees heading to the US.