According to the data published on the airport’s website, there is no wind. So why are there still landings on Runway 33?

The tailwind component is the decisive factor. It is derived from the breakdown of the crosswind and tailwind. (Example: For a wind speed of 8 knots from a direction of 290°, the tailwind component is greater than 5 knots relative to the runway centreline for northbound landings, which are at 160°.)