From June to November, Montgomery blockaded Apalachicola, Florida, off which she captured Finland, lacking proper papers, 29 August.

In November, she began patrolling the coast from Washington to Cape Fear River, and on the 8th had a running fight with Tallahassee, the Confederate iron propeller.

Joining the East Gulf Blockading Squadron 20 January 1862, Montgomery reported off Ship Island three days later.

Cruising the Mexican and Texas coasts, she helped free American citizens held in Mexico the latter part of April and took British schooner Will o’ the Wisp of the Rio Grande 3 June.

Decommissioning at Philadelphia Navy Yard 20 June 1865, she was sold at public auction 10 August 1865, redocumented 1 April 1866, and was in merchant service into 1877.