Sugar Beach is a great chill-out and picnic spot. There's a big Loblaws (grocery store) across the street to get your picnic goods, as well as an LCBO in the vicinity if you need a liquid lunch.
From the official website:
"Canada’s Sugar Beach is a whimsical new park that transformed a surface parking lot in a former industrial area into Toronto’s second urban beach at the water’s edge.
"Located at the foot of Lower Jarvis Street adjacent to the Redpath Sugar Factory, the 8500 square metre (2 acre) park is the first public space visitors see as they travel along Queens Quay from the central waterfront. The park’s brightly coloured pink beach umbrellas and iconic candy-striped rock outcroppings welcome visitors to the new waterfront neighbourhood of East Bayfront."