The boat left at 10 and returned 5. We caught the bus around the island first then had lunch before setting off on the bus over to the lighthouse. We did the tour and were rewarded with some great views from the top. It was a bit cool for a swim by the time we got back to the jetty so we had a look around the museum and buildings before heading back, glad we decided against cycling as wouldn't have seen nearly as much in the time we had there.