Something I will relate to all about what temp gauge is telling you:
Most temps sensors are located on or near the top hose outlet to the radiator. So as the coolant comes out of the radiator and makes its way inside the motor, it's removing heat from inside. Consequently this makes the coolant hotter, but it also leaves internal metals cooler. So as the coolant goes up past the sensor, it may register a hotter temp depending on how much heat the coolant absorbed. So now as it passes the sensor it will be at it's hottest point. This coolant is LEAVING the motor!! You are not gauging what's in the block, only the hot coolant temp on its way to the radiator. 200-210 is not hot and as long as the temps cool down once you start moving, you have nothing to worry about.