Where would the surviving High Seas Fleet retreat?

Would the surviving High Seas Fleet withdraw to Kiel after the Wilhelmshaven raid?

No; it would probably retreat deeper into the Baltic, most likely to Danzig, because Kiel remained too close to British attack.

The raid would change the fleet's strategic position as well as the condition of individual ships. Kiel remains exposed and keeps the surviving fleet close to the route a British force might use to enter the Baltic. Danzig places the heavy units farther from the North Sea and lengthens the time required to respond to British moves. That extra distance also concedes more initiative to Royal Navy cruisers, submarines, and raiding forces operating farther west.