El Nino region's amazing SST

Here's a chart (thanks Grok) showing the sea surface temperature of the Nino3.4 region in the central Pacific Ocean. The SST is going off the chart. 

The high bulge to the right of 2026's line is 2015, which peaked on Nov 18, 2015 at 29.81°C, an anomaly of 3.26°C relative to a baseline of 1982-2010. 

Here's a time series of the same region. If El Ninos' strength is increasing over time, I wouldn't say it's obvious from this graph? What do you think?

Of course someone should do a calculation.