Sandettie light vessel reports due point temperature (if air temperature falls to this there will be fog) of 4.5C. Latest sea surface temperature is 5ish. Sandettie is in mist and coastal Heme Bay is murky with that penetratingly cool sea side breeze. Since air will always try to cool to sea temp it is a misty outlook for the North Kent coast.
Still winter in oceanographic terms, no coastal fish until temperature of sea rises a bit.