Numerous temperature records have been "smashed" according to the Bureau of Meteorology.

With a maximum temperature of 39.7 degrees, the Cape Bruny region set a new record for the hottest day in March ever statewide.

The previous record was 38 degrees set in 2008.

Hobart has also experienced it's hottest day since the Dunalley fires in 2013 (41.8 degrees), reaching a maximum of 38 degrees.

Launceston reached a maximum of 32 degrees on Saturday.

According to BOM the lingering heat in early March has been caused by a high pressure front that has gradually moved down from the mainland, which is also experiencing a recent heatwave.

The Tasmanian Fire Service has issued a total fire ban across the south of the state, including the West Coast, Southern Midlands and Glamorgan Spring Bay.

BOM has also issued a fire weather warning for the East Coast, Western forecast districts and Central Plateau with the Midlands, Upper Derwent Valley and South East regions receiving a severe fire danger warning.

Forecasts for the rest of the week appear to cool down with high 20s predicted early in the week in Launceston, followed by rain and low 20s on Wednesday.

For Hobart, rain is predicted on Sunday and will continue to fall throughout the week, with temperatures remaining in the mid 20s.