The bear, a male, had evidently drowned after making it too far into the sea, the press announcement says.
There are very few bears in Latvia, and this is just the third individual encountered within the national park within five decades, said Nature Conservation Agency expert Vilnis Skuja.
The brown bear is a protected species in Latvia, and the country's largest carnivore. The brown bear population went extinct after intense hunting and logging in the late 19th and early 20th century.
An estimated ten to fifteen brown bears are currently residing in Latvia.