Cold is relative. It was the coldest winter for 10 years in 2014 but day temperatures were always above 20ºC. The south of the island had a couple of cloudy weeks but other than that it was beach weather most days. 

The south of the island had a couple of cloudy weeks but other than that it was beach weather most days. 

Compared to anywhere else you can fly to easily during the winter, Gran Canaria has the best weather. The south of the island is sunny for over 320 days per year and is shelñtered from the wind.