Hey Mathews, It depends on where in Kerala you want to go : 1) For beaches and backwaters- Kochi, Kumarakom, Allepay,Wayanand, Kovalam — Winter is the best time to visit 2)For hill stations -Munnar,Thekkady- Summer is best time to visit Overall winter is the best time to visit Kerala as humidity increases in summers on coastal areas which leads to more sweating and person get irritated instead of enjoying. Hope this helps.