SOFTS-Coffee futures post double-digit gains in the week; sugar stable

NEW YORK, Aug 15 (Reuters) - Coffee futures on ICE posted double-digit gains this week boosted partly by low exchange stocks, frosts in Brazil and the tariff situation, while sugar prices ended the week little changed.

COFFEE

* Arabica coffee futures KCc1 settled up 15.15 cents, or 4.6%, at $3.4165 per lb after touching an eight-week high of $3.4430. Arabica gained 10.4% this week, after rising 8.8% last week.

* Dealers said the market has been supported partly by a decline in certified exchange stocks, which fell to a one-year low at around 720,000 bags, as roasters look to secure alternative supplies following the imposition of a 50% tariff on U.S. imports of Brazilian coffee.

* Brazil supplies about one-third of U.S. coffee imports.

* "Inventories remain low, exports have underperformed in some producing regions, and recent light-to-moderate frosts in Brazil, especially in the Cerrado Mineiro region, have raised concerns about the next harvest," Rabobank analyst Guilherme Morya said in a report on Friday.

* "There are zero deals to the U.S. at the moment," said a Brazil-based broker.

* Robusta coffee LRCc2 gained 2.9% to $4,067 a metric ton, having hit its highest level in nearly two months at $4,079. Robusta gained 16% this week, after rising 8% last week.

SUGAR

* Raw sugar SBc1 ​settled down 0.14 cents, or 0.8%, at 16.44 cents per lb. The market was little changed in the week.

* Sugar production in Brazil's key center-south region fell 0.8% in the second half of July when compared to the year-earlier period, hitting 3.61 million metric tons, industry group UNICA said on Friday.

* Dealers noted falling sugar content in cane in Brazil, which might be leading mills to allocate a very high amount of cane to sugar production to fulfil export contracts. Cane allocation to sugar hit 54% in the second half of July.

* White sugar LSUc1 fell 1.7% to $481.20 a ton.

COCOA

* New York cocoa CCc2 was little changed at $8,278 a ton. The contract gained 4% in the week.

* Dealers said the recent run-up in prices had led to a pick-up in hedging, while short-term speculators had also taken some profits on long positions ahead of the weekend.

* London cocoa LCCc2 fell 0.3% to 5,551 pounds per ton.