[husker boxster]

There's a height adjustment handle on the left side of the drivers seat. The front part of the seat stays relatively the same height but the back part of the cushion moves up and down. While sitting in the seat, pull the handle up and push with some force on the cushion to lower the seat. Maybe moving the seat to its lowest position will provide you enough head room. Wouldn't want you to miss out on the thrill of owning a Boxster

But in San Diego you probably could get by with permanently keeping the top down. (I was just in Temecula last week for golf - love Temecula.)