The notice board at Wylies Baths tells the story. The seawater temperature has finally dropped down to a winter level. Last weekend it was 18°C; this weekend it's 16.5°C. I doubt that it will drop much below this temperature now. In a little over three weeks it will (officially) be Spring.
I swam my twenty lengths in clear, sparkling water. Though the temperature is a bit cooler than recent weeks, it's still mild enough to swim in just a pair of speedos and no swimcap.
There seem to be a lot more people swimming right through the winter these days. There also seem to be fewer people using wetsuits.