In the Dolphins' four games in October, Surtain recorded 19 tackles, including one for loss, and four interceptions for 34 yards in returns. He had two interceptions against both the New York Giants on Oct. 5 and the Chargers last Monday night.
Two of the picks occurred in the end zone, including one Monday night.
The Dolphins went 3-1 in October and gave up 10 points three times and 19 in the other game, the 19-13 overtime loss to New England.
Surtain has six interceptions overall, matching a career high. He's tied for the NFL lead with Minnesota's Corey Chavous and Brian Russell.