South Australia set to sizzle this summer

South Australia is likely to have warmer than average days and nights this summer.
South Australia is likely to have warmer than average days and nights this summer.

It is likely South Australia will have warmer than average days and nights across this summer, according to the Bureau of Meteorology.

One of the strongest positive Indian Ocean Dipole (IOD) events on record will have an affect on the state's weather patterns, with drier than average conditions expected in the South East region.

BoM head of long-range forecasts, Dr Andrew Watkins, said South Australia's weather forecast was interesting as most of the state did not have a strong swing for drier or wetter than average conditions.

"In terms of temperatures though its looking warm for both days and night times as well, over much of the state, with many areas getting above 80 per cent in terms of the chance of having a warmer than normal summer," Dr Watkins said.

"The eastern part of the state is really being impacted by that positive Indian Ocean Dipole that we have at the moment.

"The positive IOD is when we get cooler than normal waters off Indonesia which tends to draw the moisture away from Australia and tends to park more high pressure over in southern and south east Australia in particular."

The Southern Annular Mode (SAM) - a belt of westerly winds or low pressure surrounding Antarctica which moves either north or south - is one of the biggest drivers of southern hemisphere climate variability.

Dr Watkins said SAM would be driving airflow across the state over the summer.

"The negative Southern Annular Mode is when our weather systems are a bit further north than usual and we might see a little bit more of that onshore flow on some of those coastal regions, but inland that air is going to be coming across from inland WA and could be quite hot," he said.

Spring was hot and dry in South Australia with days warmer than average, especially in November when some extreme heat late in the month resulted in new temperature records being set in towns across the state.

Across Australia the outlook is for a high chance of warmer than average days and nights for most of the country with rainfall to be below average on the east coast.

"We've already seen significant bushfire activity during spring, and the outlook for drier and warmer than average conditions will maintain that heightened risk over the coming months," Dr Watkins said.

"This outlook also means the risk of heatwaves is increased, so it's important the community stays up to date with the latest information and advice from authorities and the Bureau's heatwave forecasts and warnings."

For more information, weather updates and warnings visit http://www.bom.gov.au/