# Autocorrelation and Partial autocorrelation plot interpretation

I'm dealing with ARIMA models and forecasts. I have a series like the one shown below:

The mean and the standard deviation seem to be stationary. I calculated the autocorrelation and the partial autocorrelation plots, that is shown below.

Does anyone is able to explain what parameters p and q I should use? Are these plots enough to see if I can use ARIMA to predict my future data?

• Maybe a seasonal term at lag ~11. – user2974951 Sep 11 at 8:40