Oh it will begin to drop, and this year too I believe.
Given that we have a strong El Nino this year, yes, the global temperature will drop shortly. We can't say precisely when, but this is a short-term peak. Of course, the overall trend is still increasing.
Globally speaking it could drop at any moment. Whose to say it hasn't after your chart came out.
You can view the current temperature anomaly here:
AMSU-A Temperatures
It's still as warm as ever. Like I said, this short-term warm period (due to the El Nino) won't last, but the overall long-term trend is still towards warming.
Then theres the southren hemisphere it is dropping fast in temperature and Antartica is dropping in temperature.
The Southern Hemisphere isn't warming as rapidly, but it's still warming:
Also, this year the temperature anomaly for Antarctica is definitely on the warm side:
I give it 3 months for the global temperature to drop again. it certainaly won't reach 1.0 in our lifetime. Quote me on this.
Given the current trend, we can expect the global temperature anomaly (as measured by Gistemp) to get around 1C in, very roughly, 30 years, give or take a decade. The UAH temperature anomaly has a higher offset due to the later start date, so obviously it'll take longer with that data set.
According to this
El Nino forecast, it looks like El Nino conditions may be weakening towards neutral conditions later in the year. So a short-term drop from the current highs within the next few months is reasonable.