Alappuzha (Alleppey), Kerala — famous for backwaters, houseboats, coir industry and beaches — is best visited during the dry season (Oct–Feb). Expect tropical weather, delicious seafood, friendly locals and relaxed travel pace.
If you want, I can suggest a 1–3 day itinerary, recommended houseboat operators, or nearby day trips (Kumarakom, Marari Beach, Ambalapuzha) based on your travel dates and budget.