Bycycle Rental - Kleinbahnstrasse
The cheapest bycicle rental in Greetsiel is located in the Kleinbahnstrasse (there is a sign "Fahrradverleih" in the front garden, you might have to ring a bell if nobody is there. They rent excellent bikes for only 5 € a day ! That is much cheaper than any bycicle rental in the Old Town of Greetsiel.
There is only one way to discover the beauty of the coastline in the region: go by bike. As the country is flat up here cycling is really relaxing.
If you cannot bring your own bike to Greetsiel, there are many places to rent them.
Best will be to drive
Best will be to drive as there is not so many trains to this direction. A car would be also practical do drive from place to place in this wonderful region. However, while in place, you can easily go from place to place by bicycle as the land is very flat here.