The most recent 30 day SOI value is now -4.82, with a daily contribution of -31. A noisy index, no doubt.  However, it is steadily moving towards the value of -8 which is the prevailing 30 day SOI value for El Nino conditions. The Aussie BOM 30 day rolling average of -4.2 is the lowest such value in at least 3 years. https://www.longpaddock.qld.gov.au/soi/

http://www.bom.gov.au/climate/enso/#tabs=Pacific-Ocean&pacific=SOI