saint tropez france Kate Moss ocean swimming breasts naked nude dive yacht

Careful, Kate!

Newlywed Kate Moss, 37, had to catch her strapless top in St.-Tropez, where she's vacationing with her daughter, Lila Grace.

Of course, some topless time probably wouldn't bother Kate too much -- later that day she dove and swam off of the yacht that she and Lila Grace are staying on ... sans swimsuit top.

Moss brought three of Lila Grace's friends with them on the trip. They're on board the Beluga yacht, moored off the Pampelone beaches. Kate headed to Club 55 beach restaurant in her green fringe get-up.