you can fish in front of the caravan park on the north side of the harbour at eyemouth. you need to park at the caravan park and head around the rocks at the bottom of the cliff. im sure this is known as the cannons, due to the cannons on the top of the cliff. you can blast a bait out into the channel from the harbour from the side of the cliffs.
best to move around to the north and fish around on the flat rocks below the caravan park, the water from here is quite deep. but the bottom is or can be snaggy.
you can fish the south side of the harbour, park your car at the harbour and walk along to the rocks, mega jagged rocks, i tend to walk south a wee bit from the harbour enterance until i spot an outlet pipe covered in concrete, then fish to the north of that, there are a few gulleys in front of you.
there are also some good rock marks in front of the golf course on the south side as well.
i have a few favourtie marks there that always seem to fish well ;D
just a case of looking for a good looking spot, the ground can be quite snaggy there and the rocks can be very jagged, not a good place to go if there has been rain or if its raining, some of the marks on the south side mean you have to go down grassy banks.
gear wise, i would take a rough ground rod, rotten bottoms.
spinning rod and a rod for float fishing.
bait wise.
crab, mussel, rag, makerel, squid, sandeel. they all work well.
try head hooking a rag under a float for pollack, spinning or using a jellu worm.
you can get wrasse to a nice side on a float with a smallish hard backed crab hooked through the tail section. just plumb the depth and try to place the float and bait as hard to a rock ledge as possible.
worked well for me in the past ;D