The DoI has said the Mountain Road is closed with immediate effect due to ‘snow and wintry conditions’.
It said the closure is in effect from Lheaney Road, Ramsey to the Creg-ny-Baa.
The road will not reopen before 4pm this afternoon.
Other roads closing later today include Douglas, Laxey and Ramsey Promenades from 12pm to 4pm to coincide with the high tides.
Yellow and Amber weather warning are in place today for strong winds and coastal overtopping.