Workers assemble an e-Golf electric car on the Volkswagen production line in Dresden. Foreign demand improved across the eurozoneFabrizio Bensch/Reuters

The euro may be at one of its strongest levels in more than two years but manufacturers in the eurozone are still experiencing a boost to orders, according to a closely-watched survey.

The purchasing managers’ index for the 19-nation bloc rose to 57.4 in August, up from 56.6 in July and well above the threshold of 50 that separates expansion from contraction. The balance is one of the best readings since 2011. Foreign demand improved in all of the nations covered by the survey, including a mild increase in Greece for the first time in a year.

The figures, compiled by IHS Markit, will be welcomed by officials at the European Central Bank, who will meet next week to start discussing how to wind down…