Some 51% of respondents to an online poll said yields would increase. A third believed their tonnage would be the same.
However, two-thirds were concerned about quality, according to the survey at potatocrop.com. Two in three growers expected their crop to be worse quality than in 2003.
A wet August has taken its toll with reports of disease and slug damage. Advisors are warning growers to monitor crops as they go into store.
Potatocrop.com is a specialist site for potato growers and potato industry professionals.