LONDON: Raw sugar futures on ICE retreated from the prior session's 4-1/2 month high on Monday, partly pulled down by a softer Brazilian real, while arabica coffee prices also fell.

A weaker real raises dollar-denominated prices in local currency terms in the world's top exporter of both commodities and can encourage producer sales.

October raw sugar fell 0.06 cents, or 0.5%, to 12.58 cents per lb by 1400 GMT. The front month peaked on Friday at 12.72 cents, its highest since March 10.

Growing concern about the production outlook in Thailand and stronger-than-expected buying by China have helped to underpin prices although most still expect the global market will be in surplus in the 2020/21 season.

October white sugar fell $7.00, or 1.8%, to $374.60 per tonne.

September arabica coffee fell 1.10 cents, or 0.9%, to $1.1785 per lb, slipping back from Friday's 3-1/2 month high of $1.1940.

September robusta coffee was $18, or 1.3%, lower at $1,326 a tonne.

Coffee prices, both for arabica and robusta futures, are seen rising slightly by the end of 2020 from current levels despite an overall view of a larger surplus in the 2020-21 season, a Reuters poll of nine traders and analysts showed.

September New York cocoa rose $60, or 2.5%, to $2,460 a tonne after peaking at $2,465, the highest level for the contract since early June.

Dealers said the market's recent improved performance had created a more bullish outlook on price charts and funds had been scaling back a net short position.

Dealers said the prospect of a large global surplus in the upcoming 2020/21 season, however, may help to limit the scope of the advance in prices.

December London cocoa rose 42 pounds, or 2.6%, to 1,680 pounds per tonne.