Blustery weather in the middle of August has sent a slew of wind energy records tumbling.

NSW wind farms generated 35 gigawatt-hours of electricity in the week starting August 18, beating the previous high for the state by about 9 per cent, consultants Intelligent Energy Systems said.

Macarthur Wind Farm in a spin. Credit:Damian White

Those gales, though, had a bigger impact the previous week, when South Australia and Victoria generated record wind energy, while Tasmania and NSW recorded some of their highest totals.

Wind farms supplied 290 gigawatt-hours of power to the National Electricity Market from August 11 to 17, shattering the previous record by 18 per cent, IES chief executive Brett Gebert said. The following week's 250-gigawatt-hour total was the second highest on record.