The Laws Ghat road is the best route to take when travelling from Madurai to Kodaikanal. To take this route you need to get on to National Highway 85. Once there, you need to move to National Highway 44. From there you need to get to Ammaiyanaickanur Vathalagundu road. Then you need to reach National Highway 183 and the Kodai Ghat road after that. Once there, you can take the Laws Ghat road till you reach Kodaikanal.
Kodaikanal is beautiful all year around, but the best time to come here is between the months of September to May so you can avoid the rainfall. If you love the rains then coming here specifically for the waterfalls makes a lot of sense. Because Kodaikanal is so lush and green, it looks the best during the monsoon.
There is only one main route to travel from Madurai to Kodaikanal. This is the law ghats road and there are a number of people that choose this road trip only for this route.
The road condition between Madurai to Kodaikanal is nice and the journey is comfortable. You should leave in the morning in order to avoid traffic during peak hours.