Study finds sea breeze could enhance Australia’s future energy grid

When the temperature climbs into the high thirties, millions of Australians reach for the same switch.

Air conditioners hum into life, homes cool down, and electricity demand begins its steady climb towards the evening peak. Keeping enough power flowing on those hot summer afternoons is already one of the biggest challenges facing the electricity grid, and it’s only set to increase as global average temperatures continue to climb.

New research from the ARC Centre of Excellence for the Weather of the 21st Century suggests that at least one familiar weather pattern may be helping at exactly the right time.

Sea breezes are part of life in many Australian coastal towns and cities. They form when the land heats more quickly than the ocean, drawing cooler air inland through the afternoon. 

In research published early in 2026, 21st Century Weather researchers at the University of Melbourne demonstrated a new way to identify sea breezes across Australia using high-resolution weather data. 

Now they have used that approach to ask a practical question – what do sea breezes mean for offshore wind energy?

The answer is encouraging.

Looking across weather data from 1979 all the way to 2024, the researchers found that on summer days with a sea breeze, six of Australia’s eight proposed offshore wind regions had stronger afternoon winds than on days without one. In many cases, the increase came during the late afternoon, close to the time when electricity demand is usually highest.

Those same sea breeze days also tended to be hotter. As temperatures rose over land, electricity demand increased as people cooled their homes and workplaces. Rather than occurring at random times, the strongest offshore winds often arrived when extra electricity was most valuable.

“We know there are are daily cycles in both electricity demand and coastal breezes,” said Dr Andrew Brown, a 21st Century Weather Research Fellow who led the study.

“Whether the peaks in these cycles align or not could be important for the future energy system.”

The research also uncovered an interesting pattern that could matter for future energy planning. Sea breezes were less likely to occur on opposite-facing coastlines on the same day. For example, if conditions favoured a sea breeze near Newcastle in New South Wales, they were often less favourable along parts of the South Australian coast.

That doesn’t mean one wind farm can replace another. It does suggest there may be advantages in spreading offshore wind developments across different coastlines, rather than concentrating them in one part of the country.

Dr Claire Vincent of the University of Melbourne, a Chief Investigator with 21st Century Weather, said: “This research addresses a core question for us – do periods of higher wind energy capacity match with periods of higher demand?”

“In the case of the seabreeze, the answer can be ‘yes’, with seabreeze days leading to both higher average afternoon capacity factor, and higher average afternoon electricity demand.” 

Sea breezes have always been part of Australia’s summer weather. Now, Andrew and Claire’s work suggests they may also become part of the way Australia keeps the lights on.

To read the research paper in full, go to: https://wes.copernicus.org/articles/11/2287/2026/

This article was created using a combination of human and artificial intelligence.