I started the thread but thought that I give some people a go before opening my mouth.
I fish off the rocks (land based) mainly and I target Trevally from the rocks. As you might think there are going to be times that the weather is going to be cold. This is something that we just have to put up with as the passion for fishing can be strong. How do I stay warm in the winter months while fishing.
The most basic thing to do is wear warmer clothing, a spring suit, a wet suit or a padded PFD. Do not get your feet wet. Prevent from getting splashed by wearing a spray jacket. Get some gloves full cover for your fingers or fingerless gloves. Fish from a higher location from the rocks, one that does not get washed over.
Try fishing from the beach, waft or dare I say it a boat.
The cold is not what will get to us but the water on our bodies that will cause heat lost from evaporation. So take along a towel to dry your feet if they get wet. And with your first aid kit a thermal blanket.
As you can see there are some people like myself that love the winter months for fishing.
So I go prepared.