It might be hard going at Kashid at the moment thanks to the monsoonal weather. I've not had any personal experience of conditions at this time of the year but i'm sure some of the other guys might be able to throw some light on whether its worth fishing.
When I passed Kashid last there were some nice barras jumping off the beach which was quite exciting to see but they didn't seem interested in getting caught!!
I imagine the way to go would be some smelly bait such as sardines, prawns and squid on small hooks to see what might be around. Maybe you could find a local estuary where you would get some shelter and calmer waters to fish. I'm sure if the water is couloured up there will be various species looking around for some tasty morsel. (avoid the estuary if too much fresh water is pushing out)
leger you baits hard on the bottom as the fish will have more diificulty than usual to find it if the water is coloured. a static bait will give you more chance.
look forward to hearing how you get on.
all the best, Scott