Pakistan with a vast coastiline facing the Arabian sea provides ample opportunity for deep sea fishing and other water sports. However unfortunately little effort has been delled to promote this sport and other activities.
However there are fishing/sports enthusiasts who have put in a lot of effort in developing this activity (see attached/linked article below) and taking it to the next step. This sport is still in its infancy but developing fast.
There are several boat clubs that offers boating and other water sports activities. Although for most of them you require a membership, but if you have the right connection you can enjoy some good sailing on the open ocean or in and around the creeks.