I agree that it's not quite peaceful but I'm not sure that I'd go as far as disturbing. The chair in the water is certainly odd. A lounge chair that is sort of near the surf so if you are sitting there, you can get some water on your feet - that can be nice and relaxing. This, however, is too far out and it seems like the wrong kind of chair for lounging, so we're left with questions.
Having said all this, I like it for all those reasons. It is a very peaceful, tranquil scene, but then you get to the chair and you think, "Huh?" I find the composition pleasing, and I tend to prefer subtle colors like you have here.
Edit: One tiny little nitpick - I wish the reflection of the chair weren't cut off.