Donald Trump’s support with Hispanics is underwater in the crucial swing state of Florida, according to a new poll.

Only 12.9 percent of Hispanics in the Sunshine State back the GOP’s presidential nominee, a New Latino Voice survey said Wednesday.

{mosads}“[It’s] a historical low for a Republican candidate,” Eduardo Gamarra, the poll’s co-author, told Univision Wednesday. 

“If the voter turnout of Hispanics is high here, Trump runs the risk of not winning. The Hispanic Republican [base] shrinks during every election cycle in Florida.”

Pollsters found 76.4 percent of Florida’s Hispanics would vote for Hillary Clinton, the Democratic presidential nominee. An additional 10.7 percent back another candidate.

The New Latino Voice conducted its latest sampling via online interviews from July 26 to 31. It did not provide either a sample size or the margin of error.

Trump’s low support among Florida’s Hispanics could cost him the state and its 29 electoral votes — a major loss in the road to the 270 necessary for the presidency.

President Obama won Florida in 2012 and 2008, while former President George W. Bush carried it in 2004 and 2000.

“The Hispanic bloc in Florida is crucial, as are other groups,” Susan McManus, a political scientist at the University of South Florida in Tampa, told Univision. “In 2012, Obama only beat [GOP presidential nominee Mitt] Romney by 0.9 percent.”

The Pew Research Center in January said 18 percent of Florida’s eligible voters are Hispanic, the demographic’s fifth-highest population nationwide.

Trump leads Clinton by 0.3 percent among all Florida voters, according to the latest RealClearPolitics average of polls.