Hi Jamie
In winter the fishing during the day tends to be limited to flatfish, the odd bass if you are very lucky (and the further south the better) and whiting which apparently feed on sight and therefore do not mind daylight. As the light level declines, you will find that other species become less sensitive and venture closer to shore - codling is the prime target for most anglers. The state of the tide could be more important than the light level, as could your choice of bait, and a load more.
Joe is right - check with your local shop and ideally join a local sea angling club.