João Pessoa offers a rich cultural experience, bountiful nature and relatively friendly locals. However, as a solo female traveler, caution should not be discarded. Petty theft, especially in crowded areas and at night, can be a concern. Public transportation is generally safe, but it's better to avoid it during off-peak hours. Using a taxi or ride-hailing service late at night is advisable. Remember always to be vigilant, as in any other city, and avoid risky areas or situations.