The CFA says six to eight fire stations are broken into each year across Victoria on average.
In October, it recorded six station break-ins.
Fire authorities are bracing for one of the worst bushfire seasons in decades.
The Country Fire Authority (CFA) recorded six station break-ins across Victoria last month, close to the number it averages in a full year.
The volunteer fire service averages between six-to-eight known break-ins each year, with the true number potentially higher.
The ABC understands not all break-ins are reported.
Chief officer Jason Heffernan said the break-ins had the potential to impact a brigade's ability to respond to emergencies.
"[It] places an additional burden on volunteers who give their time to protect their communities," he said.
The October break-ins were recorded in the small regional towns of Timmering, Chocolyn, Kerang, Winnindoo and Stonehaven, which was targeted twice.
The CFA said it was reviewing security operations across the state in the wake of the break-ins.
At Stonehaven, near Geelong, a CFA station was targeted twice within a matter of days.
While nothing was stolen, the break-ins left a hefty repair bill.
Acting assistant chief fire officer of district seven, Mark Collins said it was particularly disappointing ahead of what is expected to be a challenging bushfire season.
