Yes, you are correct.
I think that you are using the 1W transformer, and it is a little better than the 0.5 W transformer that Hero999 was looking at.
However, the voltage still rises a lot on no load, to 1.32 times the 8 V = 10.56 volts.
I suspect it might be higher than that. The regulation is usually better for larger transformers, but in that range the 1 W transformer seems to have better regulation than the 3.2 W one.
Other things to be aware of:-
1) Get the windings the right way round. The dots on the diagram show the ends of the windings that become positive at the same time.
2) The peak voltage will be 1.41 time larger than the RMS voltage, so it could be as large as 14.9 V on an unloaded 8 V winding. It is the peak voltage that determines how big the DC voltage is when the AC is rectified.
3) The terrible regulation means that the output voltage dips a lot when the output is loaded. If you are rectifying, the waveform looks just about square at full load.