The 1938 pool has new tiles, a restored diving tower and water warmed to 24°C by heat from the sea wall pumps.
Lanes open from first light. Pack a towel and a padlock; we have everything else, including a warm café that faces the water.
Three lanes for lengths only until nine, every day of the year.
Seawater filtered every four hours and warmed without gas.
Or £48 a month, with one free guest swim each week.