Serang is generally safe for solo female travelers. Like any other place, it's important to exercise typical precautions such as avoiding isolated areas, particularly at night, and staying aware of your surroundings at all times. It's also recommended to respect local customs and dress modestly. Most locals are very friendly towards tourists but remember to always trust your instincts. Overall, Serang affords a high level of safety, but complete assurance can never be guaranteed anywhere.