The world I have imagined is much like Venus, with an atmosphere at "sea level" 70 times that of Earth, and temperatures at the same altitude approaching 377 degrees Celsius - with much more favorable temperature and pressure about 55km up. I used an online calculator to find these numbers (with 55000m as ha and 20 degrees Celsius as Ta). Other than my oceans toeing the supercritical line, it seems that liquid water will exist there, and presumably evaporate and regulate the heat on the planet the same way it does on Earth.
I'm unsure how temperature and pressure effect windspeed or other weather factors. I imagine that the amount of oceans is similar to Earth, so their depth and coverage of the planet are similar. And of course, with the atmosphere so much denser the atmosphere must also extend much higher above the surface than on Earth.
All other factors being the same as Earth: Would high pressure and heat create superstorms, or would the pressure dampen the weather towards stillness? Please don't worry about the effects of continents and mountains (though they are present) on wind currents. I'm more specifically interested in the higher altitudes, where temperature and pressure are friendlier.
I suspect the surface is hellish enough as it is, but I'm welcome to ideas about how the weather might be at the surface. Any other ideas on how such a hot ocean might affect weather are also welcome, but not part of the question.