If you are not on contract right now it would be cheaper to just cancel your service and conect it back at the end of the summer
For this year it's probably too late proceed that way (as Bell TV requires a 30 days warning before they disconnect), but for next year you could call a month before the day you want your service suspended, request a cancellation of service, they will put an open work order in their system. Once the summer has ended you could call and reconnect your service. Technically they should charge you a 50$ reconnection fee, but, if things haven't changed too much at Bell TV, you could probably easilly reconnect whithout paying it, lots of agents forget to add the charge.
Lots of clients are also downgrading their package to Digital Standard only...that way they have a few choice of channels for the rainy days.
Also note that temporary suspension will cost you more if you make your request with an agent then it would cost you if you make the same request using you remote control or going on the web to place you request.