Well I just landed a AI in 2-4 foot surf last weekend.
There is a lot more to a beach than wave height. Slope, sand verus rock, set frequency, etc.
It's also how you setup your landing. In my case went in with sail furled, drive pulled, paddling like hell on the back side of a wave in front of me, and as it turned out guessed right about the following wave being small.
Local dealer prefers using the drive and securing it in folded position at last second. Good method for sand as you come in pretty fast.
While I am not poo pawing dangerous waters like high surf offshore sandbars, good seamanship, chart knowledge, study of coast pilots, google earth, etc are things that I think loubud will probably study in advance.. Also if he goes with someone else, a beach recon using fins and leaving two yaks out with the partner could prove useful.
Your not trying to surf here. Just get in or out safe.
At sea the AI is probably one of the safest yaks around. And yes I flipped it in 30+ knot winds when the aka brace assembly popped up. Not that difficult to get upright.
You would be hard pressed to find a better candidate for his Mexico expedition.