The euro zone's adjusted current account surplus widened a touch in September as a rise in primary income offset a small drop in the trade surplus, data from the European Central Bank showed on Friday.

The surplus increased to 31.23 billion euros ($33.9 billion) in September from 30.81 billion euros in August. Based on unadjusted figures, it increased to 40.78 billion euros from 33.74 billion.

In the 12 months to September, the euro area's current account surplus widened to 1.2% of the bloc's GDP after a deficit of 0.2% in the preceding 12 months.

($1 = 0.9213 euros) (Reporting by Balazs Koranyi; editing by Jason Neely)