Motorists travelling around the South Island this weekend are being urged to plan carefully, as warm temperatures are forecast alongside gale force winds and heavy rain.

People heading home after holiday, are being reminded that conditions could be challenging on parts of the state highway network due to high temptures forecast.

MetService has issued a range of weather warnings and watches across the South Island for the weekend.

A strong wind warning is in place for Canterbury, covering the high country and areas near the foothills from Saturday night through to Sunday.

Heavy rain warnings apply for Westland and Fiordland between Haast and Doubtful Sound from 3am Saturday, and from 11pm Saturday for the ranges of the Westland District about and north of Haast.

Lesser wind and rain watches cover much of the remainder of the South Island, including Otago and Southland, where periods of unsettled weather could still affect driving conditions.

New Zealand Transport Agency Waka Kotahi is encouraging road users to adjust their travel plans and driving behaviour to suit the conditions.

MetService has a host of weather warnings and watches in place for the weekend, when temperatures are expected to tip over 30 deg C in some parts of the South Island.

“Heavy rain can lead to surface flooding, slips and reduced traction,” the agency advises. Drivers are urged to reduce speeds, increase following distances, avoid sudden braking and ensure their vehicles remain visible.

In areas experiencing gale force winds, those driving high-sided vehicles, towing trailers or caravans, and motorcyclists are advised to take extra care.

State highways may face temporary restrictions or closures if obstructions occur or public safety is at risk.

Motorists are encouraged to check weather forecasts and road conditions before travelling, and to continue monitoring updates during their journey.

Stay up to date on the weather conditions at the MetService site , and on the status of the state highways at the Journey Planner.