Forcasting on Temprature data

Hi,

I was trying Forcast feature on my data, but it does not gives me a expected results.

I have a daily temprature data of some machines and I want to forcast the the temprature of machine.

Ater every 30 sec I am receving temprature data.

When I plot temprature against date on line graph and try to add forcast on the same,nothing happen.

did I miss something or my data need any changes?

I am attaching snap of my screen for reference.

Thanks in advance 

Regards,

VivekC