Feb 8 (Reuters) - British power generator and network operator SSE kept its annual profit forecast on Thursday, but warned that final numbers for the full-year could be in a narrower range due to lower-than-expected renewables production in the third quarter.

The company, which reiterated its adjusted earnings per share forecast for the full year ending in March of more than 150 pence, said a challenging weather and operational conditions that saw 10 named storms hurt its renewables output.

Gas prices usually rise in the winter season due to high demand for heating, but a milder winter this year dented demand for the power sector.

The country's energy regulator, Ofgem, said in November that most British households would face higher energy bills from January, after it increased its price cap by 5% to reflect a rise in wholesale energy prices.

However, analysts at Cornwall Insight last month said that domestic energy price cap is expected to fall 16% in April after a drop in wholesale prices over the past few months despite geopolitical concerns and disruption to energy cargoes in the Red Sea.

SSE Renewables production over the first three quarters of the year was 15% below the company's planned output, impacted by mixed weather conditions and short-term plant outages.

This weather has continued into January, SSE said, adding that annual earnings outcome was subject to plant availability, supportive market conditions and normal weather for the remainder of the year.

(Reporting by Radhika Anilkumar in Bengaluru; Editing by Rashmi Aich)