Experts predict further price hikes at supermarkets

Food shortages have plagued supermarkets but experts are warning it may get worse.

With a third La Nina weather event and heavy downpours predicted and more producer pain, price hikes could follow at the checkouts.

National Farmers Federation chief economist Ash Salardini said there is a worker shortage of 170,000 on farms across processing and manufacturing.

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"If we don't address that food availability and affordability it's going to be an issue for 12 months to 24 months," Salardini said.

Global supply chain issues, inflation and extreme weather events have left no choice but for many producers and processors to pass on added costs.

The price of poultry, grains, leafy greens and berries are set to rise, as is the price of dairy products, which are set to climb by 30 per cent.

According to comparison app Frugl, it has already begun.

The price of cooking oil has surged by more than 33 per cent in the past year, while milk is up more than 16 per cent and margarine up 50 per cent.

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Lettuce has come down from its $12 peak, with iceberg lettuce now $2.50.

However a wetter than usual spring on the east coast means supply that can't be guaranteed.

"If we have floods in the next three to six months or if it rains at the wrong time, for example during harvest, expect to see shortages or price rises," Salardini said.

The Bureau of Meteorology said even with a weak La Nina, New South Wales is likely to see increased flooding events across the state.

The advice is shop for what is in season, and shop at local fruit and veg stores as well as farmers markets, which offer the best value.