Te Papa has notified the Museum of Fine Arts in Boston after water dripped from a leak near an exhibition of paintings by Monet.
The exhibition, Monet and the Impressionists, is on loan from the museum. It includes 27 works by Monet and others by Cezanne, Degas, Manet, Pissaro, Renoir and Sisley.
Chief executive Seddon Bennington says torrential rain caused a small leak in the roof at Te Papa, but no water actually touched the paintings.
He says Boston has been informed and Te Papa expects to hear from it in the next day or two.
