The sight where I located these photos (an outdated auction sight, I found a lot of stuff at those) claims that these photos are from the Bahamas during the shooting of Help! in 1965. I am not so sure about that. George wore a blue shirt in the filming and the shirt he is wearing here looks more like what he was wearing in Miami in 1964. The palm trees also remind me of Miami. However, I cannot really tell by looking at his hair since the wind is blowing it.
Also who is Uncle Walter?