The answer to this question can change, as banks and lenders will change their interest rates depending on some of the factors mentioned above.
At the moment, fixed interest rates are slightly better than variable interest rates. But this would mean you're locked into that rate for a set period, and if rates drop over that time you won't benefit from lower rates. At the same time, if rates increase you would be locked into a better rate. The lowest fixed rate on the market right now is 4.99%.
The lowest variable rate on the market right now is 5.69%.