The 30 th anniversary of the Ottawa International Busker Festival runs from Aug. The August long weekend features street performers dazzling crowds on Sparks Street in downtown Ottawa. 16 – Ukraine, The Colours of the Ukrainian Soul themeįor tickets and information, visit. Spectacular fireworks displays will light up the sky over the Ottawa River on six nights in August during the 26 th edition of the Les Grand Feux du Casino Lac-Leamy. CTVNewsOttawa.ca looks at 20 things to do in Ottawa and Gatineau during the month of August.