I’m afraid that this is as close to a webcam in Castletown that we have at the moment. This webcam is actually situated at Scarlett Point (the scene of many ship wrecks on the Isle of Man) and will either be looking out south towards the Calf of Man or straight out to sea. There are actually 2 webcams together on the Coastguard Tower at Scarlett Point.
Check Out Both Scarlett Point Webcams Together