In that case Dougie, then concentrate on the skerries around Muckle Island (you'll easily know it when you see it) as well as along the shoreline in front of Ronnie Breks boat hire bay right up to the top of the loch (OTFA end).
Bottom of the loch (sea end) can be ok and a wee run along the shore (both sides) always worthy of the time in the right wind.
Olive, black and claret Snatchers worth giving a swim, as are Claret, Natural Hares Ear, and Olive Hogs.
Short lining in a big wave can be spectacular, otherwise try a general figure of eight retrieve with the Hogs (Ginked Up).
Stripping lures worth keeping in mind and watch out for some serious takes as the fish in here are usually a bit fierce.
Away from Swannay, Harray is worth some serious attention, same flies with more emphasis on the olive ones. Midge patterns this time of year also a must (for all Orkney waters) and top tip wherever you're fishing, if you see birds working the water go there right away. Also in Orkney not so much if you can't see the bottom, but more if you can't feel it then you're often fishing too deep. (I regularly fish right onto the stones into less than a foot of water). Dries can be (and are for me) often very deadly.
Hope the weather's kind to you, but even in a gale you'll catch fish.
Cheers
Allan
