Form middle of January to middle of May is the best time to visit as the days are mostly sunny. From May end to end of July the islands are hit by heavy rain and from August to November, occasional showers and slightly rough seas are possible. From early December to middle of January the weather again becomes rough and rains heavily.
Hindi, Bengali, Tamil, Telugu and English are widely spoken at Andaman Islands.
30 days Restricted Area Premit for Non-Indians are issued at Port Blair Airport on arrival, without RAP, none of the hotels in Andaman Islands will provide accommodation to foreigners.
Indians do not require any permit to visit Andaman islands.
Basic Indian food is available in small dhabas and restaurants, expensive resorts may serve few western dishes. Sea food is available everywhere. At Havelock and Neil Island finding pure veg restaurant is difficult.
Fresh coconuts are popular and widely available. Alcohol is available in some restaurants and at 'English Beer & Wine Shops' in Port Blair and on Havelock Island. The beers will not be cold when purchasing across the counter,except in local bars. There's is no pub culture or dance clubs.
The Andamans are a fairly safe destination. Tourism is still in its early stages which makes it almost hassle free. That said, you should keep your wits about you as you would anywhere.
Saltwater crocodiles (Crocodylus porosus) are present within suitable habitat throughout the Andaman & Nicobar Islands. While attacks on locals do occur every year within the island chain, the only attack on a foreigner within recent history occurred off the coast of Havelock Island in April of 2010. While saltwater crocodiles generally remain within the rivers and coastal mangrove swamps, they do occasionally travel within the open ocean, as was the case in this attack. Attacks on humans in the ocean are very rare.
Andaman and Nicobar are malarial, although generally no more so than mainland India.
The following Banks having their ATM services at Andaman & Nicobar Islands are: State Bank of India, ICICI Bank, HDFC Bank, Vijaya Bank, Indian overseas bank, Axis Bank Ltd, Canara Bank, Punjab National Bank, Indian bank, Union bank of India, Syndicate Bank, Allahabad Bank, Bank of Baroda, Uco bank, United bank of India. There are only 02 ATMs at Havelock.
Hotels accept credit cards and debit cards but most of the time due to poor internet connectivity the transaction fails, therefore it is advisable to carry ample cash.