Toronto authorities have announced temporary restrictions on parts of Lake Ontario as the city prepares for the 77th Canadian International Air Show, which begins its public shows this weekend.

A marine exclusion zone will operate in the western section of Toronto Harbour and Humber Bay during the event. The restrictions are designed to keep boats and other watercraft away from areas affected by the air-show operations and to maintain a safe environment for spectators and participants.

The restrictions are scheduled for the three main show days—Saturday, September 5, Sunday, September 6, and Monday, September 7. The restricted period each day is from noon until approximately 3:40 p.m.

Officials have also warned boaters that Hanlan’s Point Beach will be closed to watercraft while the event is taking place. Yellow caution buoys will mark the exclusion area so that people on the water can identify the boundaries.

The measures are being coordinated by Toronto Police Service’s Marine Unit together with Ports Toronto and Transport Canada. Their involvement is intended to help manage marine traffic while the air show takes place over the waterfront.

Boaters planning to travel through Toronto Harbour or Humber Bay during the afternoon should therefore take the temporary restrictions into account and avoid entering the designated zone.

The Canadian International Air Show is a major annual waterfront event, drawing spectators to Toronto’s lakeside areas to watch military and civilian aircraft demonstrations. With large crowds expected, authorities are using temporary transportation and safety measures to manage activity around the waterfront.

The marine restrictions will remain in effect through Monday’s show before normal access is expected to resume.