Frankly the above advice about feeding them by scattering food on the lawn is just as bad as someone trying to pet them. Squirrels fed by humans will: 1) Increase beyond the natural capacity of the location to support; 2) Become accustomed and therefore unafraid of humans; and 3) Become aggressive. Feeding squirrels, whether by hand or by scattering food is a very bad idea.
Err . . . . not entirely true. At least not in Western Australia. I dunno, maybe the climate makes them different here or something.
See, about 100 or so years ago, Indian squirrels were released at Perth zoo. They've never actually really left that area since. True, they HAVE been found along the shore-line to the south, but that's about it. And no, contrary to popular belief, they aren't being predated upon to a great extent. The escarpment where I live is only 30k's from the zoo, so well within reach, but they've never turned up.
The sqirrels at the zoo aren't fed by staff, btw. And they don't mug you for food either. I've met seagulls who're worse. It's a little bizzare.
So, yes, weird stuff. Like I said, maybe they like the beach too much and are just hanging out on Cottesloe beach at the Indian Tea House and surfing.