Go down to the centre of Cap Pele, go behind the church and follow the road on the right going down to the lagoon. It used to be easily accessible but they did a lot of work on it last year so Access might be a problem now I haven't been there in 2013 yet..
Posting all these lagoon locations is really good info, Merv.
Thank you for posting this info. I look forward to checking it out, down the road.