This is a transportation question, but since it is a short jaunt related to a very specific area, this seemed like a better place to post the matter than on the "transportation" site. Is there any public transportation between Bremerhaven and Ovelgönne? If there is a bus, does it run regularly? I have to get from Bremerhaven to Ovelgönne and back within about 5 hours.
OK, you are going to have to be a little more specific. I've found three or four Ovelgönne, all in Niedersachsen. One looks fairly close to Bremerhaven.
The Bahn shows a town called Ovelgönne, about an hour south of Bremerhaven. The only connection they show is a one hour bus to "Winterbahn, Ovelgönne-Oldenbrok", about 59 min from Bremerhaven and 5 km from Ovelgönne. There are two stops on that bus (#440) in Golzwarden, about 40 min from Bremerhaven, that might be closer to Ovelgönne.