I have faced the same issue but on Civic Reborn. There's a rubber plug inside the front left wheel well which local installers remove while installing front camera , security system etc.. You will need to remove the wheel & the inner fender plastic shield to see it. It is to the steering side.
You might have same or similar problem. Also it could be a clogged moon roof drain if you have a moon roof model. Moon roof drain water comes through same path where this hole is.