Posted September 11th, 2017, 07:09 AM
A couple of suggestions, you could join a walk around St Peter Port by a qualified island tour guide. There is no pre-booking required, you just turn up around 10:20 (leaves sharp at 10:30) at the tourist information office (you can ask at the Pier for directions, about a five minute walk from the pier), and takes approx. 1 1/2 to 1 3/4 hours, costs GBP 8.00 per person.
I would also suggest trying to go to the Little Chapel and possibly the Occupation Museum as well. You could take the round the island bus in an anti-clockwise direction, so that you would see most of the island, then disembark at the stop after the airport, and walk around the corner to the Occupation museum. After you have finished, walk back to the airport, and embark on a bus that will take you to the Little Chapel (not the round the island bus), after you have finished, you could then take a bus back into St Peter Port.
I attach some links below which may be of assistance:
If you need any further assistance, please feel free to post, and I will see if I can assist.
I am sure you will enjoy your visit to Guernsey, fingers crossed that the weather is kind for you.