The Office of the Cane and Sugar Board (OCSB) has forecast a sugar output of 10.2 million metric tons (11.24 million tons) to 10.3 million metric tons from the 2012/13 crop. The crushing season normally starts in November and runs through April.
"If the coming heavy rains provide abundant water for the cane, we could see our cane production hit a record again this year," said a senior official at the OCSB.
Cane output last year was 99 million metric tons, yielding a record 10.2 million metric tons of sugar.
Rubber trees were not expected to suffer too much this year but supply was likely to decline as the rain disrupts tapping over the next couple of months.
The northeast accounts for around 30 percent of Thailand's annual rubber production of 3.2 million metric tons.
On Thursday, the government announced plans to cut rubber supply and restrict exports, in coordination with Indonesia and Malaysia, in order to stem a sharp fall in prices. The three countries account for 70 percent of global production.
($1 = 31.5500 Thai baht)
(Editing by Alan Raybould and Miral Fahmy)