I don't really have any favourite spot. I usually fish from a boat, and drop a prawn-style jig while I'm fishing. I occasionally get a bonus of calimari for dinner. Best time of year seems to be winter, but I still get the odd one through summer.
I think people who target squid seem to concentrate on jetties, especially it there are lights shining on the water at night. Perhaps someone with more clues than me can give you some more advice.
Best of luck,
Mike