For popularity, no other Portuguese table wine can match Vinho verde. This is the name of the wine as well as the region. Contrary to what we tend to find on shelves here in the U.S., Vinho Verde is produced in red, white, and even rosé iterations. The success of Vinho Verde stems as much from the wine's price - it is awfully affordable - as its character: light, refreshing and with a hint of fizz.
Vinho Verde is so affordable because it is produced from less ripe grapes, resulting in unmatched freshness and modest alcohol levels, perfect for summer sipping.
Two to try:
Quinta da Aveleda
Photo courtesy @rgs via Flickr/CC