Police are warning motorists to drive to the conditions this morning.
A yellow weather warning remains in place for icy conditions until 9am.
On Facebook, officers say they're had reports of ice patches on the Mountain Road.
The road is currently open, but they're asking people to take care.
Drone ban for skateboarding championship
Pick it up plea from Castletown commissioners
New online Isle of Man guide for refugees and asylum seekers
Lifeboat called to yacht's rescue
Government reveals TT viewing figures
Final wind farm hearings set for July
Cocaine dealer to appeal 14-year jail term
Infrastructure Minister defends road checks for cat’s eyes work