Forecast for overnight temperature has dropped from benign to be zero - from 10pm to 6am and then only 2 degrees by 7am, bathing in the morning sunshine. Sounds like the tights will make a reappearance after a month in shorts/threequarters. And winter gloves.
ETA: On the plus side, should be a tailwind, more or less, all the way back from New Quay, more so from midnight onwards.