Party Game Ideas??????

Okay, so I am planning on having my birthday at a beach house in November (I know that's a loooong way away, but I'm just too excited). Do you have any fun game ideas for a big group (about 7-10 people)? I already have Night Capture the Flag, but what else?? I am turning 13 if that helps. :) Board game ideas will work too, but I was thinking more of activities like Hide and Go Seek for example. Other info that might help: We are all tweens, it will most likely be chilly outside because it will be in November, the beach house is big, nice Atlantic Ocean right out back! Any ideas would be GREATLY appreciated! Thanks a bunch!! :)