Archachon is very easy to reach from Bordeaux. For budget travelers, there are plenty of daily trains leaving from Gare Saint-Jean in Bordeaux. Another cheaper alternative would be the buses leaving from bus stop in front of Gare Saint-Jean. It takes about 1 hour and half to reach Arcachon town.
Lovely surroundings of Arcachon becomes horrendous in July if you try to get anywhere — it takes nearly 3 hours to get from Arcachon to Andernos Le Bains in the early evenings. In fact, if you want to go anywhere in the area in summer, you'd better start early in the morning around 9AM. This is not a place for those preferring laziness in the mornings while on vacations.
You might be surprised that just walking through this neighborhood is one of the attractions of tourist coming to the town. Very beautiful houses, each of them having a meaningful name, are actually individually a touristic attraction.
While walking in Arcachon, there are many cloth shops, selling Arcachon costumes. The traditional women clothes are quite colorful, light, loose clothes. Tourists have been very interested to buy some during summer.