Giuseppe Abbati (January 13, 1836 – February 21, 1868) was an Italian artist who belonged to the group known as the Macchiaioli.
Abbati was born in Naples and received early training in painting from his brother Vincenzo. He participated in Garibaldi's 1860 campaign, suffering the loss of his right eye at the Battle of Capua. Afterwards he moved to Florence where, at the Caffè Michelangiolo, he met Giovanni Fattori, Silvestro Lega, and the rest of the artists who would soon be dubbed the Macchiaioli.
While his early paintings were interiors, he quickly became attracted to the practice of painting landscapes en plein air. His activity as a painter was interrupted during 1866 when he enlisted again in the army for the Third Independence War, during which he was captured by the Austrians and held in Croatia.
His paintings are characterized by a bold treatment of light effects. He often painted a luminous landscape scene as seen through the doorway of a darkened interior, as in the View from the Wine Cellar of Diego Martelli (1866). Some of his late landscapes are in the greatly elongated horizontal format often favored by the Macchiaioli.