Rui Sérgio de Almeida Águas (born February 29, 1972, in Nampula, Mozambique) is a Mozambican-born Portuguese race car driver.

Águas spent two seasons in Formula 3000, driving for Nordic in 1997 and Auto Sport and Coloni in 1998.

He has since moved on to Formula Nissan and Renault Eurocup, before making a name for himself on the GT class, being one of the top contenders of the GT2 category, always at the wheel of a Ferrari.

For 2012, Aguas competed in the FIA World Endurance Championship in an AF Waltrip Ferrari F458 Italia.

† There was no drivers championship that year, the result indicates team rank in the LMGTE Am Trophy.