WASHINGTON— Federal Reserve Chairman Ben Bernanke warned Tuesday that the financial crisis has not only darkened the country’s current economic performance but also could prolong the pain.

The Fed chief’s more gloomy assessment appeared to open the door wider to an interest rate cut on or before Oct. 28-29, the central bank’s next meeting, to brace the wobbly economy.

Bernanke said the Fed will “need to consider” whether its current stance of holding rates steady “remains appropriate” given the fallout from the worst financial crisis in decades.

If the Fed does lower its key rate from 2 percent it would mark an about-face.

The Fed in June had halted an aggressive rate-cutting campaign to revive the economy out of fear those low rates would aggravate inflation.

Since then, financial and economic conditions have deteriorated, while inflation pressures have calmed, giving the Fed more leeway to again cut rates.

Many believe the country is on the brink of, or already in, its first recession since 2001.

“The outlook for economic growth has worsened,” Bernanke said in prepared remarks to the annual meeting here of the National Association for Business Economics.

All told, economic activity is likely to be “subdued” during the remainder of this year and into next year, Bernanke said. “The heightened financial turmoil that we have experienced of late may well lengthen the period of weak economic performance and further increase the risks to growth,” he warned.