Search TS, there are lots of threads on mic stands. Generally, stands intended for photographic lighting, backdrops, etc. is what most tapers are using. They range from fancy to cheapo - I've gotten by fine with cheapo light stands for decades, as its mostly about the required height, footprint, stowed length, and fastening system at the top. You don't need or necessarily want one that is "air cushioned" as that just slows down stand lowering and can occasionally clog making collapsing that section of the stand stand difficult.
For the beach you won't need individually adjustable legs. I would suggest bringing a few shopping type bags you can fill with sand to anchor the stand by placing one on each leg.
The more critical concern is most likely to be if your windscreens are up to the task!