First of all, Marseille is a port city in Southern France who has been a crossroads of immigration & trade. At its heart is the “Vieux Port”, where fishman sell their catch along the quay. The Basilique “Notre Dame de la Garde” is a famous church.
Massif des Calanques ; The “Massif des Calanques” is a wild & rugged terrain stretching from the 9th arrondissement of Marseille to the east towards “Cassis”, spanning 20 km in length and 4 km in width along the coast. Its highest peak is “Mont Puget” at 565m. If you can rent a boat while visiting the “Calanques” by the sea, it is a beautiful opportunity & wonderful scenery.
Museums ; The “Museum of European and Mediterranean Civilisations” – “MuCEM” is a national museum. It was inaugurated in 2013, a year when Marseille was designated as the European Capital of Culture. You will find in Promenade Robert Laffont. It is 9.50 euro for the ticket but the garden & the walk around it are free when the museum is open. This typical architecture is amazing to watch. Seems like a funny place to seat & have a relax afternoon.
Also, “The Unité d’habitation” is a modernist residential housing design principle developed by “Le Corbusier”. It is locate in Boulevard Michelet. You can find some of the Art of “Le Corbusier” & in addition, if you are a lover of his design, then most of all, enjoy the building.
Finally, if you can come to visit “Marseille”, go to the Port & have a “Pastis” & go to play la “Petanque” with the people from the village !
In conclusion, It is best to go during summer but as it is next to the sea & south of France, you should have good weather.