2jjayhawk

I have a 2004 Accord with a mysterious water leak on the drivers' side under the seat. Here is what I have done so far (I have no sun roof):

Even though it is clearly on the drivers side, I checked the A/C line and it is not blocked.

I've ran water along the windows & front/rear windshield and no additional water accumulates.

After a big rain when I return to my car (which is parked outside) the floor is dry. After driving for 20 minutes or so at high speeds, the water starts accumulating. Any idea what could be causing this leak? I haven't had any body work done, but could something have come loose that is causing water to enter the vehicle? I'm completely out of ideas. Thanks for any suggestions.

BLKFLSH

If the water only gets in while driving, I think it's coming in from a hole in the floorboard. It may take getting under the car or removing the seat and some carpeting to find the hole. It could be a seat bolt or some wiring harness grommet.