The Lonely Planet Guide to Portugal makes no mention of the boating opportunities on Europe's biggest lake, Portugal's Grande Lago.
In fact there are luxurious hire cruisers operated by Nicols Boats (a French company) which opertae from a base at Amieira, which is about a 45 minute drive from Evora.
The Grande Lago enjoys a wonderful climate, and opportunities for a few days, or even a week's, cruising to visit the many attractive villages around this huge lake
Nicols Boat Hire