San Juan del Sur is generally safe, however it is advisable to take caution especially during the night in this tourist destination. While the main areas are typically well-traveled and well-lit, some of the outer parts can have poor lighting and low police presence. It's recommended to use taxis or trusted transportation at night, avoid quieter, less populated areas and always be aware of your surroundings. As is true in any location, avoid showing valuable belongings in order to not attract unwanted attention.