Tropical Storm Arlene was the first named storm of the 2005 Atlantic hurricane season. Arlene was a large storm that formed early in the year. It had maximum wind speeds of 70 mph (110 km/h). It also caused one death and created $11.8 million (2005 USD) in damage.

The storm formed near Honduras on June 8 and moved north. It came close to western Cuba on June 10 before entering the Gulf of Mexico. Arlene strengthened just below hurricane strength before making landfall on western Florida. The storm quickly weakened while moving inland, and later became an extratropical remnant on June 13.