Nicoya Peninsula is generally safe for female travelers. The area is known for its friendly locals and laid-back atmosphere, and the crime rate is relatively low. However, as with any destination, it is important to take the necessary precautions to ensure your safety. Be aware of your surroundings, avoid walking alone at night, and keep your valuables secure. Additionally, it is recommended to dress modestly and respect local customs. With these precautions in mind, you can enjoy a safe and enjoyable trip to Nicoya Peninsula.