So organiser Eddie Spearing admits to being a nervous man, constantly scanning weather forecasts as race day tomorrow approaches.
Mr Spearing said he had 125 confirmed entries, "which is good'', but he knew of another 15 swimmers waiting to see what the weather was like on the day.
He was hoping for more than 200 entries and was encouraged by the forecast, which showed the summer's ever-present northwest winds dropping away today.
There might be grey skies and some drizzle tomorrow, but that would not bother swimmers, Mr Spearing said.
"It's looking very positive for the weekend.''
Last year, wind gusts of up to 36 knots put paid to both the race day and the postponement day, leaving Mr Spearing and his partner Jamie Norman "very disappointed''.
The pair decided last month to acknowledge that the lake had "won'' and dropped the two silver rings they had made for the winners of the event into deep water near the island.
Two new rings are being made.
The Ruby comprises a variety of races, the longest a 3.8km swim which includes two circuits around the island.
