Online resources such as Global Volunteers (www.globalvolunteers.org/portugal), Go Abroad (www.goabroad.com) and Transitions Abroad (www.transitionsabroad.com) list opportunities for volunteers in Portugal – including teaching English and helping out on social projects.

World Wide Opportunities on Organic Farms (WWOOF; www.wwoof.pt) sometimes has opportunities in Portugal. In exchange for your volunteer help, you'll receive food and lodging, and learn about organic farming as well.