Curran has now taken 7 wickets in his last 3 matches at an economy rate of 6.4 runs per over.
Curran took 2/29 and scored 31 runs off 26 balls in Surrey's 37-run loss to Middlesex early last week.
Surrey bounced back with a dominant win over Glamorgan on Friday. Curran was named Player of the Match after taking a spectacular hat-trick en route to figures of 3/3, as Glamorgan were skittled for 44 in response to Surrey's total of 141.
The South African born speedster was influential with the ball again two days later, taking 2/32 and scoring 19 valuable runs in Surrey's thrilling tie with Sussex.
Fellow Sixers Englishman James Vince also showcased his form with the bat, scoring 51 off 35 balls in Hampshire's loss to Kent early last week.