An IR thermometer is like $12 too. I used mine to set my pressure on my outback with AT tires by checking center and shoulder temps after a highway drive. And to check my fish tank temperatures. And lots of things.
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I live mostly in the OBX and I air down to 20psi. Not sure where you are driving on the beach but if it is at the ramp across from the fishing center you can use the free (donation) air there. Its not the straight line driving that kills your tires but turning, especially at slow speeds but tightly. The hassle is deflating every time. Buy the JT Brooks tire deflator Pro set (be sure to get the Pro so you can set the psi and your done). This makes deflating super fast. You will be done while other people are still on tire #1. I also have my own air pump that attaches to the battery. Those that use a 12V socket are useless and too slow.
I think I posted about this when it happened & w/ a pic....but I pulled a Subaru crosstrek driver out of an imminent total loss situation as the tie was getting up past his rocker panels & coming in fast while he had all 4 tires @ least 6” in the sand lol@KBernard is spot on about ramp2, last year I drove it and it was like quicksand for about 100 yards out, then it was normal condition the rest of the beach. It was the only area I needed to pay any attention to, as it were. Was running 21-22 psi.
Incidentally, there was a car stuck at one of the ramps last year too. A front driver with a passed out driver. He didn’t make it more than a few feet into the sand ;-)