Landing speed for Apollo I think was supposed to be about 30 feet per second, which seems to come out at 20 mph, or 33 km/h.

Apollo 15 had one of their parachutes fail, and landed at about 34 fps.

The other thing was that the CM was tilted at an angle of over 20 degrees, so that rather than doing a belly flop into the water, one edge hit first, and the shock of landing was attenuated.

It's amazing what you can find out by reading the Apollo Lunar Surface Journal (even if it was put together by those NASA hoaxers and their co-conspirators [img]/phpBB/images/smiles/icon_wink.gif[/img] ).