Parachutes impart heavy stresses on the rocket so aside form the weight of the 'chutes you have to strengthen the rocket, adding even more weight. They also don't allow for landings that are either precise or vertical. In theory you could use 'chutes to slow the rocket for part of the descent, but to land vertically at a precise point you'd still have to add legs and use fuel for a propulsive landing. At which point the 'chutes are adding very little value.
Landing in the sea with floatables means you get a very wet rocket contaminated with saltwater and potentialy flotsam. Seawater plays havock with the hot precision metal parts of the rocket engine. Also again you have to strengthen the rocket to survive the tumble into the sea and wave action.
So using parachutes adds significantly more weight without giving you what you want, and ditching into the sea also means more structural weight and mucks up your engines.
As for wind, the rocket isn't going to be launched if there's a risk of high wind gusts regardless, and most anything else the vehicle is capable of compensating for with its thrust and fins.
After landing, it's extremely bottom heavy. Got a bunch of engines and legs down there, and up top a big empty tube. I imagine it's still possible in bad weather, but they'll probably try to avoid that. I imagine it will also be tied down or put on a recovery ship some time after landing.