Porto Torres is generally a friendly and welcoming location for solo female travelers. Crime rates are relatively low, and it's not common to experience serious issues. However, as anywhere else, it's always encouraged to stay alert, especially during the night, in more remote areas and when using public transportation. It's also advisable to understand some basic Italian to negotiate situations where English isn't widely spoken. Stick to public places, keep an eye on your belongings, avoid walking alone at night if possible and always let someone know your itinerary and whereabouts to stay safe.