The IPCC 4th Assessment Report states that climate change, in particular increased risk of floods and droughts, expected to have a severe impact on South Asian countries, which economies rely mainly on agriculture. In fact, although South Asia has low GHG emissions, climate change has already deeply affected the economic growth and development of this region. This study examines the impact of climate change on rice productivity and economic growth among South Asian countries for the period 1971-2018. Also, examine the decadal seasonal variations in rainfall pattern calculated for summer, winter, monsoon and post-monsoon seasons of selected South Asian countries (Bangladesh, India, Sri Lanka and Pakistan). Results of panel data analysis show that Rice Productivity, Carbon dioxide emissions and Rainfall have a positive relationship with economic growth, while Temperature has a negative relationship with economic growth. The increase in temperature, particularly the maximum temperature has a considerable adverse effect on crop performances and ultimately it affects economic growth.