If you capsize in a sea kayak near to the bank/shore, sometimes it’s easiest just to swim to the bank, empty the boat and get back in.
The suggested method is very similar to a simple K1 self-rescue.
Keep hold of your boat and paddle, flip the boat over at the cockpit so it’s the right way up (easier to swim with). Place the paddle in the boat, then go to the bow and swim to shore holding on by a deck line or bow toggle. Be aware of any hazards at the bank such as overhanging trees or moored boats, especially in higher flows.
As sea kayaks have a bulkhead just behind the seat, emptying your boat is easier than emptying a K1. Simply lift it up by the bow and flip over. Most of the water will come out in one go. You might want to sponge out a bit to finish off, then you’re ready to go.