Winter without a doubt
No it is both, because you can play indoors and out.
In most areas, yes, basketball is only a winter sport. Since many sports require the outdoors, not many others sports can be done during the winter. Basketball can be played in the warmth of a gym.
Both Lithuania and Latvia (Baltic states) have basketball as the national sport. However, Latvia has two national sports: basketball in the summer, ice hockey in winter.
Winter Sport
The table tennis is a winter sport as well as a summer sport.
Summer! Competitive badminton is played indoors and can be played in all seasons.
summer
winter
Wrestling is a Summer Olympics sport.
Curling is played in the winter because that's the COLDEST season andcurling is a winter sport
Equestrian is a summer Olympics sport, not a winter sport. Therefore the Equestrian games will be in the 2016 summer games.
basketball, baseball, & a couple of NFL games
neither