Safety issues in Nassau are quite acute. The city is quite large, and not all of its neighborhoods are considered safe. For example, there are many residential areas in upper Nassau, and the locals are not too keen on tourists. In general, there are not many incidents, but it is better to be careful. Fights and street theft are possible. Where there are guards at large hotels and restaurants, such troubles are less frequent.
Do not leave large sums of money in hotel rooms, try not to carry valuables in plain sight. Use hotel safes, or just keep a close eye on your belongings. Do not leave your rented car anywhere, use parking lots. It is better for women not to walk alone in the evening.
There are guards and lifeguards on the beaches, but you should still be careful, this is the ocean and there may be currents in it, dangerous for those who do not swim too well. In addition, on some beaches, near the shore, there are sea urchins, and in this case it is better to stock up on slippers, and swim carefully.