Hi

Your map looks fine and realistic at first sight. There is one issue concerning tectonics that I need to note though, and I would try to fix it if I were you:
Towards the west of the map you have a huge arc-chain of islands, big ones. An arc like that happens as a result of oceanic crust being subducted under another plate and by the size of the islands, that has been going on for a while... However, at the same time, there is a clear West-East oceanic ridge spreading the northern continent from the southern ones. They are sufficiently away to say this has been happening for some time as well.
My point is that you have created an impossible area. You cannot have subduction and crust-formation in the same point, there is no way a ridge suddenly ends in a subduction zone (I just double checked this on an Earth's map and can't see it anywhere)

On a more positive note, I quickly drafted a map of oceanic currents for you. This is draft though because there is one very important information needed to make it more accurate - the limits of the continental shelves.
Click image for larger version.  Name: Map_currents.png  Views: 451  Size: 232.8 KB  ID: 60523

Here's my rules of thumb for creating currents (assuming Earth-like conditions):
- at the equator, hot currents develop in from East to West, they will flow poleward as soon as they find a significant continental mass (even if underwater, some continental shelves are submerged).
- this poleward movement of hot water remains "glued" to eastern coasts until they are more or less around 45º-60º - they will be turning Eastward by then.
- Once they become eastbound they start cooling down into cold currents, they will move towards the equator once they meet another continent.
- Even for smaller gulfs, the basic rule is that hot currents will also go polebound in the eastern coasts.