Riot, in reference to Ocean Week (2017), have a FAQ that states:
How can I track my contribution?
You’ll be able to see the total amount of points that you’ve individually contributed through the client.
But I've looked in a few places in the client and couldn't find where it is. Could someone more specifically state where it shows the contribution that I have made to Ocean Week?
Best Answer
You can see your contribution on the official site for the Ocean Week 2017.
Now this is on the web and unfortunately I can't 100% tell where you can see it in the client since I play on EUW, however from some comments I've seen it appears to be visible in the post-game screen. (Again not 100% sure).
Image of the tracker on the website
Also keep in mind that you have to enlist in order to contribute to the project.