By Train : The nearest 2 rail stations to Mandarmani are Digha (21 kms) and Kanthi (24 kms). You can opt for any one of these as per convenience.
Frequent trains are available from Howrah railway station to Digha and Kanthi (Contai), as example Tamralipta Express, Dhauli Express, Howrah Bhubaneswar Janashatabdi, Kandari Express etc. From Digha or Contai Railway Station you can hire a private cab to reach Mandarmani.
By Bus : Frequent bus services are available from Kolkata to direst Digha. From Digha or Contai Railway Station you can hire a private cab to reach Mandarmani.
By Car : If you are coming from Kolkata, you have to reach Mandarmani via Kolaghat, Tamluk, Contai and Chawlkhola.