Surf Life Saving Australia announced the decision on Thursday.
The Coast is set to boast a stellar cast of lifesavers in the 2020/21 series, including defending ironwoman champion Lana Rogers, Cooper Williams, Tiarrn Raymond, Tayla Halliday, Emma Woods, Electra Outram and Tiarnee Massie.
"It is really unfortunate that we have had to again make the decision to postpone the start of the Nutri-Grain Ironman and Ironwoman Series, but the decision has been made with the best interests of everyone involved and the wider community," SLSA board member and surf sports board chair Suzanne Storrie said.
"It is impossible to 100 per cent confirm how the Series will proceed, but we are determined to explore all options to run the six rounds of the elite and Next Gen Series. Our staff are actively working through options with a wide range of stakeholders.