Salou is generally very safe for solo female travelers. Being a popular tourist destination, it is well-equipped in terms of security arrangements. There is a visible police presence especially in the city's busiest places like tourist attractions, shopping areas, and transit stations. However, like any other highly touristic place, be aware of petty thieves and always keep an eye on your belongings. Nightlife areas may also get a bit raucous but it's safe enough, provided you stay alert and aware. Otherwise, you can walk around the streets of Salou comfortably during the daytime, and locals are usually friendly and helpful towards travelers.