Caernarfon is generally a safe place for solo female travelers. The crime rate is relatively low compared to other regions. However, like any travel destination, it's important to stay aware of your surroundings, especially in more secluded locations or during night-time. The locals are friendly and helpful, and there's a strong police presence to ensure safety. Always remember to take the necessary precautions, including locking hotel rooms and not flaunting expensive items.