The parent company of SSE Airtricity has warned that its profit for the first six months of the year would halve compared to the same period a year ago due to the impact of dry, still and warm weather and persistently high gas prices.
SSE also said the price cap on default energy bills proposed by the UK energy regulator last week would result in "significantly" lower full-year profit at its energy services division than what it expected at the start of the year.
SSE said the weather and gas price effects had knocked around £80m off first-quarter profit and £190m in the first five months of the year.
"Lower than expected output of renewable energy and higher than expected gas prices mean that SSE's financial performance in the first five months has been disappointing and regrettable," the company's chief executive Alistair Phillips-Davies said.
SSE said weather conditions and high gas prices would "potentially" have an impact on its full-year results.