Visited April 12 - April 19th 2013
Saw no evidence of prior posts (dirty, trash, etc).
The beach itself is sand for 100'+ and then pebbles further away from the shoreline (due to a 8 - 10' tide).
I checked the tide charts (free maps at all restaurants / talk to the locals). If I wanted a day at Jaco Beach to sun and swim - I took my lawn chair and beach towel, layed on the sand and waded out to the Pacific Ocean whenever I wanted to (while tide was going out). If I wanted to see the surfers, or sit at a beachside restaurant enjoying the views, sound of surf crashing or watching the sunset .. I'd stage myself in a restaurant while tide came in.
For a completely NEW diversion, I'd walk up to the 'community beach' on the north side of the Jaco beach and watch the local kids on the swing sets, monkey bars and teeter-totter. This kept me busy for hours ... the local families and kids know how to enjoy the Jaco beach, for sure!!
The only way this beach could have been described as dirty would be:
1. Tourists may have made a mess during high season
2. Visitors are not used to Pacific beaches / brown sand / pebbles further up the tide line
I'll be back for sure. This beach offered nice sand, exploring, surf ogling and affordable beach side bars / restaurants. Beach to the south (5 minute ride) had surf crashing on shore 24 / 7 ... no way to sun or swim, town was miniscule. I wasted an hour going there and getting back ... should have stayed on Jaco beach!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.