Guaruja, can provide a generally safe visit for solo female travelers, considering proper precautions are taken. The city is vastly touristic and its beaches are usually crowded, which can serve as an inherent security feature. As always, standard travel safety advice such as avoiding unlit or deserted areas at night and keeping an eye on your belongings at all times is applicable here. Violent crime is not common, but petty thefts can occur. Therefore, awareness of your surrounding and adopting local customs can greatly enhance your safety.