The world is not to be so much different from Earth, unless it has 1.5x Earth's mass, the average temperature is 17°C and the axial tilt is 20,5°.
Comparing to Earth in this latitude, it should be Cfb/c in the west coast like in southwest Chile and northwest USA/Canada, but the central and east coast should be the same? Like in south Australia and New Zealand that is Cfb too. Even some islands in latitude 50 have this climate, but above this it changes to ET, because of Antarctica. Or should it have a warmer weather, because of the info above? (Csb/a, for example).
This is the map of the world with topography. Dark green is 0-200m, green is 200-500m, yellow is 500-1000m, light brown is 1000-1500m, brown is 1500-2500m, dark brown is 2500-3500m and red is higher than 3500m.
Dot line is the tropics and dashed line is 45°. And to be specific, the "equator" passes by the inner sea.