Hopefully Little_Dragon will pop by with some links

All right, if you insist ....

RunTime DNA: desert prop (sand dunes), surfboard, jetty

SAMS 3D had a beach umbrella among its freebies; it wouldn't hurt to ask Sharon.

Zippo's Laboratory 108: swim ring, frisbee, dumbbell, beach umbrella, soda can and ice-cream cone, sunglasses

geralday's Fast3d: folding beach chair and windbreak

Dizzie has some beach props but I haven't got the link here

Dizzie's Digital Renders: beach toys and textures