Mumbai is on the Arabian Sea coast and gets the full force of the Southwest Monsoon. The best months to visit are November through February. Temperatures are around 22C to 30C, humidity drops, and the city is energized after the long monsoon. December and January are the most popular months. The Kala Ghoda Arts Festival in February fills the Fort district with contemporary art, music, and street food for nine days. March to May sees rising heat and humidity, around 32C to 38C, which makes outdoor sightseeing strenuous. June through September is full monsoon season. The city receives over 2,400mm of rain annually, and most of it falls in these months. The monsoon is also Mumbai at its most dramatic: the coastline at Marine Drive during high rain and the Haji Ali Dargah causeway at high tide are memorable but challenging to navigate. Flooding in low-lying areas, especially Kurla and Dharavi, disrupts transport. Ganesh Chaturthi in August or September is Mumbai's biggest celebration. Idol processions to the sea fill the Marine Drive and Juhu Beach with millions of people.