When it happens to find those particular Winter days, with cold water (below 20°C), calm sea and wind coming from the land, fish in open water will generally non be present.
The Winter prey, but also predator, for excellence is the bass, that will though not be much attracted by the coast in these conditions.
It will be than a good decision to choose fishing spots with big flat rocks and well protected burrows in shallow water. We will evidently need to fish looking is such areas, chacking themost protected holes. Here we will be able to find breams, that will be much les reactive than in periods with hot water (above 20-22°C)
If we will find ourselves necessarily in a spot with few rocks and holes, a good technicque is the ambush in shallow water, looking for breams and mullets.