Last year, I swam sans wetsuit. Air temperature 16°C, water temperature 9.2°C, according to the RNLI event organisers. I didn’t stay in very long.
This year, the event was held on Boxing Day as they need a morning tide. I haven’t been in since November and was due at my brothers’ for lunch, so I gave it a miss. My pal Sherry did swim, but she didn’t stay in for long.