Arrest following Donegal woman's death in Northern Ireland
Mrs Lu Na McKinney, a mother of two from Donegal who was originally from China, died while on a family holiday near Devenish Island in April.
Emergency services found her body in the water but attempts to resuscitate her failed.
Her death was initially thought to be a boating accident until detectives reviewed the evidence.
The suspect, who is 41, was arrested in Londonderry last week.
He has also been charged with possession of a Class C controlled drug.
He is due to appear before Omagh Magistrates' Court on Tuesday morning.