Far more than adequate for a 182.
If you have not experienced it before, it is easy to get low on the approach because the ground rises on the approach over the sea.
Inevitably the hump causes you too think the runway is far shorter than it actually is - just convince yourself their is plenty beyond the hump, and if you prefer, have a good look first.
Also inevitably in strond winds expect some sheer or sink as you cross the cliffs.
However the aircraft will be more than happy with St Mary's!