Two sets of roadworks starting in Lake on Monday are expected to last around five months.
The first scheme - undertaken as part of the construction of a new Marston's restaurant - includes highways improvements and installing a new roundabout at the junction of Newport Road and Whitecross Lane.
The works are programmed to continue until mid-March and temporary lights will be in use on Newport Road.
The Whitecross Lane junction will be closed for the initial phase of the work although will be re-opened in mid-December.
The second major project involves Southern Gas Networks gas main and individual service replacements.
These works are planned in Sandown Road at the junction of The Fairway, lasting until early December, then again between January until March.
Temporary lights will be in operation throughout the project.
Peter Hayward, manager for highways and transport, said: "Unfortunately because of the length of these two works, it is not possible to schedule these at different times.
"This is because doing so would impact on the tourist season when traffic flows increase significantly on our roads and disruption would be more severe.
"We advise motorists to avoid the area if possible, with those travelling from Newport to Sandown advised to go via Brading, and traffic from Newport to Shanklin advised to travel via Godshill.
"We do appreciate these two schemes will cause disruption to motorists but we feel the approach we are taking will at least concentrate that disruption over the shortest time period and avoid the main summer season."
More information about the two schemes can be found in the roadworks section on the council's website, www.iwight.com.