Festivals of Haldia comprise numerous regional festivals like Ratha Yatra, Durga Puja, Vishwakarma Puja, Vasa Utsav and several others. The annual fair of Mahishadal is quite attractive and is thronged by innumerable tourists. During the monsoons, Haldia teems with millions of devotees and tourists who make merry during all these festivals.

Ratha Yatra
The festival of Ratha Yatra is celebrated with pomp in Mahisadal, in the region of Purba Medinipur. This occurs in the Eastern Indian state of West Bengal during June or July. Ratha Yatra is a grand festival which deals with worshipping Lord Jagannath. Bright lights and beautiful flowers are utilized to adorn the local temples. Numerable devotees approach this place to pull the ropes of the 'Chariot of the Lord', or the 'Ratha'. Ratha Yatra is used to mark the journey of Lord Jagannath to his aunt's temple, along with his sister Subhadra and brother Balarama.

Moyna Rasmela
Moyna Rasmela festival is interwoven with ancient traditions and customs. Several local inhabitants, irrespective of caste and creed are united in the celebration of Moyna Rasmela. The festival of arranging this fair had started in the year 1561 to 1562, on the full-moon day of the month of Karika. In the year 2009, the 44th Ras festival was arranged. The intricate details of the fair are administered by the Moyna Rasmela Committee.

Durga Puja
Goddess Durga is worshipped during the month of autumn and is known to be one of the grandest festivals enjoyed by the Hindus in the state of West Bengal. Elaborate pandals are created to perform the rites and rituals of Durga Puja. Some of the most renowned pujas in Haldia include Durgachak Puja, Hazramorh Puja and many others.

Vishwakarma Puja
Vishwakarma Puja is performed with gaiety in the area of Haldia. Lord Vishwakarma is revered as the chief divine engineer who is believed to have created the world with diligence and creativity. As many as 2000 pandals are built to worship the Lord Vishwakarma and dance, 'yatra' and magic are used to entertain the people. However, nowadays, this puja is performed as a community festival which is done in the regional villages and towns of Haldia for a period of three days.

Vasa Utsav
The Vasa Sahid Utsav is organized in Haldia during the months of June and July. The Haldia Municipality is in charge of arranging the Utsav. Several poets and literates from West Bengal and also from within Haldia migrate to this place during this Utsav. Various types of debate and discussions are also conducted in a 'kavita sabha' which takes place in Haldia.