Not sure if these qualify as "beach" (no sand and definitely no swimming), but they certainly are ocean shore shots:
Islote I by ramirezaponte, on Flickr
Islote II by ramirezaponte, on Flickr
Islote, Arecibo, Puerto Rico. Leica M9P, 18mm 4.0 ZM Distagon and 90mm 2.5 Summarit.
Cheers,
Antonio