Samsung announced the Galaxy S7 and S7 Edge amidst a lot of interest at MWC in Barcelona last month. The phone largely comes with the same design as the Galaxy S6, though the major differentiating factor is a slightly bigger size, a little more roundish design and a water and dust resistance out of the box. The phone is rated IP68, as a result of which you will be able to use the phone under water for about 30 minutes.
However, here comes a word of caution. Plenty of users at XDA-Developers, a leading forum for Android are complaining that when they tried to charge the phone immediately after it was wet, it raised an error message that the phone could not charge as moisture was detected in the USB port. The phone then does not charge for a good while as the flag disables charging in order to keep the phone safe.
The user reported that it takes a while for the device to get charging again, and even though it does charge after a while, it charges only normally, without any fast charging which is a major loss. We are sure that a more concrete solution or statement would come out on the issue in the coming days, but for now, it looks like it is best avoided if you do not charge the phone when it is wet.