Mr Nattavudh said the Foreign Ministry has been unofficially informed by the ICJ that the ruling would be made on Nov 11. The court had contacted Thai ambassador to the Netherlands Veerachai Plasai with the information.
An official letter from the ICJ on the matter would follow, he added.
Foreign Minister Surapong Tovichakchaikul said earlier this month that the ICJ had postponed the ruling from October to February next year because it had other cases to consider first..
The minister said on Wednesday that the ministry earlier believed the ICJ might move another case involving Peru and Chile up for consideration before making a ruling on the Thai-Cambodian dispute, but things did not turn out as expected. The court decided to postpone another case to make way for the Preah Vihear ruling.
Mr Surapong and Mr Nuttavudh said no matter what the ruling may be, the Thai side is ready to accept it and cope with it..
The dispute over the area surrounding Preah Vihear stems from a World Court judgement in 1962 awarding the temple to Cambodia. Under the ruling, Thailand was obliged to withdraw its troops from the temple and its "vicinity''.
The ruling, however, did not define the "vicinity" or how much territory was involved. Thailand claims it is a 0.35 square kilometre area immediately around the temple, while Cambodia says it is a much larger area of about 4.6 sq km.
Thailand claims the overlapping area is part of Kantharalak distrct of Si Sa Ket, but Cambodia says it is part of Preah Vihear province.
The dispute has led to several border skirmishes, which eventually prompted Cambodia to ask the ICJ in April 2011 to reinterpret the 1962 judgement and decide whether the temple and its "vicinity'' included the 4.6 sq km area around the ruins.
The two countries in the border dispute gave their closing statements before the ICJ in The Hague, The Netherlands, in April.