The Swiss Federal Customs Administration released its trade data on Thursday. The Swiss trade surplus climbed to CHF2.85 billion in April from CHF2.49 billion in the previous month. March's figure was revised down from a surplus of CHF2.52 billion.
Analysts had expected the surplus to increase to CHF2.77 billion.
Exports decreased seasonally adjusted 1.1% in April, while imports were down 3.5%.
On a yearly basis, exports fell 5.1% in April, while imports dropped 8.1%.