UPDATE 1-Mantega sees Brazil real weakening against dollar

(Adds minister's view on 2010 growth)

BRASILIA, Sept 8 (Reuters) - Finance Minister Guido Mantega said on Monday the Brazilian real would likely continue to weaken against the dollar due to the country's shrinking trade surplus, a growing current-account deficit and tightening of credit on the international market.

Brazil's currency, the real (BRBY), continued last week's decline and weakened nearly 1 percent to 1.735 per U.S. dollar on Monday as the dollar pushed to its strongest level in a year against a basket of currencies.

"I think it (the exchange rate) will continue on this trajectory," Mantega said during a ceremony in Brasilia.

The minister added that the depreciation of the real and government measures now in place to stimulate exports should be sufficient to contain the current-accounts deficit, which the market sees at $25 billion in 2008 after five years in surplus.

Mantega said that he expected Brazil's economy to grow at 5 percent in 2010, after expanding 4.5 percent in 2009. (Reporting by Isabel Versiani, Ana Nicolaci da Costa; writing by Reese Ewing; Editing by Gary Hill)