It is understood the group, some of them Italian, had been visiting Cramond Island in the Firth of Forth, which is accessed by a tidal causeway.
The Coastguard yesterday received a call for help after one of the men in the group tried to walk the kilometre back to shore in water that was nearly thigh-deep and rising.
A Coastguard spokesman said: “We received a call at 12.51pm from a female on her mobile phone who said they were stuck on Cramond Island. She said there were six people in her party including one child along with six other cyclists. We understand one male had tried to wade back to shore but he turned round and waited for the Atlantic 85 vessel that was sent out at 12.57pm.”