In Martinique, Euros are the only really useable currency. U.S. Dollars and UK Pounds, are difficult to convert to Euros. Locals will tell you to go back to the airport, to use the exchange office there. Your best bet, is to use an ATM machine, there are many. The machine will let you take money out of your account, at home, but in Euros. That means your bank will convert the amount of Euros you receive from the machine, from you bank account at home, in your local currency. Bank-operated 24-hour ATM’s can also be found throughout the island. Don't bother trying to convert your money at a bank, unless you are in Fort de France. Bank hours vary, though Fort-de-France banks are generally open 7:30 a.m. to noon and 2:30 to 4:30 p.m. weekdays.