How to counter Nidalee
Let us take a look on how to beat Nidalee. We will look at champions who are strong against Nidalee and who are weak against Nidalee. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Jungle champion who counters Nidalee. You can already win in champion select with the right counters for Nidalee. If you want to know how to counter Nidalee then you need to take into account the best picks vs Nidalee and the worst picks vs Nidalee. This Nidalee counter data is based on matches played by Pros on patch 14.10 and previous ones. It is important to see whether Pros counter picked Nidalee or whether they played as Nidalee.
Champions used by Pros to counter pick Nidalee
Looking at the matches from Pros (see table Pros counter picked Nidalee) we can see that they picked 
Lee Sin most often to counter pick Nidalee. The matchup Lee Sin vs Nidalee occured 104 times. Nidalee has 62 wins and 42 losses in this matchup. Learn how to counter pick Lee Sin to get another perspective on the data.
Lane outcome for Nidalee
When looking at Nidalee counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Nidalee. The lane outcome of Nidalee consists of three outcomes: Win, Loss or Draw. Let's take a look of Nidalee lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Nidalee.
Conclusion
Analyze the available data and learn how to beat Nidalee. To master Nidalee take also a look on Nidalee builds and runes for Nidalee. Good luck, Summoner!