ELBOURNE, Dec 15 (Reuters) - Oil prices fell on Wednesday for a third day on growing expectations that supply growth will outpace demand growth next year, even though the Omicron coronavirus variant is not seen curbing mobility as sharply as earlier COVID-19 variants. U.S. West Texas Intermediate (WTI) crude futures fell 52 cents, or 0.7%, to $70.21 a barrel at 0215 GMT, after losing 56 cents in the previous session. Brent crude futures fell 43 cents, or 0.6%, to $73.27 a barrel, after losing 69 cents on Tuesday. The International Energy Agency (IEA) on Tuesday said a surge in COVID-19 cases with the emergence of the Omicron variant will dent global demand for oil at the same time that crude output is set to increase, especially in the United States, with supply set to exceed demand through at least the end of next year. read more In contrast, the Organization of the Petroleum Exporting (OPEC) on Monday raised its world oil demand forecast for the first quarter of 2022. read more "The IEA"s bearish view on the market was in stark contrast to OPEC"s more positive view when it released its monthly outlook earlier this week. The divide suggests volatility is likely to remain high in the short term," ANZ commodity analysts said in a note. Also weighing on the market is a firming U.S. dollar, which makes commodities priced in the greenback more expensive for other countries. Markets are awaiting the outcome of a key U.S. Federal Reserve policy meeting on Wednesday for signs of when the central bank may raise interest rates. In another bearish indicator, industry data showed that U.S. crude inventories last week did not decline as much as expected. American Petroleum Institute data showed U.S. crude stocks fell by 815,000 barrels in the week ended Dec. 10, according to market sources, compared with a 2.1 million barrel drop that 10 analysts polled by Reuters had expected. However distillate stocks fell by 1 million barrels, compared with analysts" forecasts for an increase of 700,000 barrels, and gasoline stocks rose by 426,000 barrels, which was a smaller build than expected. Weekly data from the U.S. Energy Information Administration is due later on Wednesday.