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Southern Oscillation Index history

Bureau of Meteorology

The Bureau of Meteorology (BOM) Southern Oscillation Index history displays the Southern Oscillation Index (SOI), giveing an indication of the development and intensity of El Niño or La Niña events in the Pacific Ocean.

View the Southern Oscillation Index history

Updated 15 Jun 2023
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The Great Barrier Reef Marine Park Authority acknowledges the expertise, wisdom, and enduring connections that have informed the guardianship of the Reef for millennia. We pay our respects to the Traditional Owners as the first managers of this land and sea, and value their traditional knowledge which continues to inform the current management and stewardship of the Reef for future generations.