Nakhon Si Thammarat is generally considered safe for solo female travelers. It is a peaceful and serene place filled with temples, local markets, and welcoming locals. While incidents of crime against tourists are low, it's still important to remain cautious, particularly at night or when exploring less crowded areas. Ensure your belongings are always secure and while engaging with local traditions and cultures, be respectful yet firm. Use trusted transport services or taxis, especially during late hours.