OTTAWA, Oct 29 (Reuters) - The Canadian economy most likely underperformed expectations in the third quarter amid ongoing supply chain woes and a brutal drought, official data suggested on Friday, prompting analysts to forecast the Bank of Canada could move slower on rate hikes. The economy expanded by 0.4% in August, missing estimates, and looked set to show no growth in September, when supply chain issues crimped auto exports and retail sales declined, Statistics Canada said. The agriculture sector, hit hard by hot and dry conditions, is also weighing on economic activity. Third quarter annualized GDP rose by just 1.9%, Statscan said in a flash estimate, much less than the 5.5% forecast by the Bank of Canada on Wednesday, when it signaled a rate hike could come as soon as April 2022. read more Even though the central bank and Statistics Canada use slightly different ways of measuring GDP, analysts said the third quarter projections made an early hike less likely. "This reduces the chance of the Bank hiking interest rates as soon as the second quarter next year," said Stephen Brown, senior Canada economist at Capital Economics. Economic activity, which remains about 1% below pre-pandemic levels, is unlikely to close that gap until early 2022, he added. Avery Shenfeld, chief economist at CIBC Capital Markets, noted the preliminary third quarter data revealed the impacts of global supply chain difficulties on the ability of the goods sector to meet orders. "The supply bottlenecks are both raising inflation and impeding growth at the same time," he said in a note, adding Canada could enjoy stronger growth and softer inflation in 2022 if the challenges eased. The Bank of Canada expects inflation, which touched an 18-year high at 4.4% in September, to rise further this year and then average 3.4% in 2022, above its 1-3% control range. The Canadian dollar was trading 0.4% lower at 1.2387 to the greenback, or 80.73 U.S. cents. Investors continued to price in a first rate hike in March. The August gain of 0.4% was behind analyst estimates of 0.7%, as agriculture weighed. Overall, 15 of 20 industrial sectors posted increases, with services-producing industries up by 0.6% while goods-producing industries declined 0.1%. Reporting by Julie Gordon in Ottawa; editing by Chizu Nomiyama, Jonathan Oatis and Mark Heinrich Our Standards: The Thomson Reuters Trust Principles.