Which day, what time and where: the weekly street markets, flea markets and producers' markets.
The weekly market at Camposol, the large mostly British urbanisation inland from Puerto de Mazarrón: fruit and veg, clothes and household goods every Thursday morning (8am–2pm in summer).
Mazarrón town's Saturday-morning market, a few kilometres inland from the port: produce, clothes and household goods, with the old town's tapas bars nearby.
Puerto de Mazarrón's weekly street market every Sunday morning — around 40 stalls of fresh produce, clothes, nuts and prepared food, 8am–2pm. (A separate market runs Saturdays up in Mazarrón town.)
Puerto de Mazarrón has three regular markets: the Camposol Thursday Market: every Thursday, 8:30–14:30, at Camposol, Mazarrón; the Mazarrón Town Saturday Market: every Saturday, 8:00–14:00, at Mazarrón town centre and the Puerto de Mazarrón Sunday Street Market: every Sunday, 8:00–14:00, at Puerto de Mazarrón. The next one is tomorrow: Camposol Thursday Market.
Markets set up early and start packing away around lunchtime, so go early for the best choice and an easier parking space. They can be cancelled or moved when the fairground hosts the town's feria, and on some public holidays.
The Camposol Thursday Market: every Thursday, 8:30–14:30, at Camposol, Mazarrón; the Mazarrón Town Saturday Market: every Saturday, 8:00–14:00, at Mazarrón town centre and the Puerto de Mazarrón Sunday Street Market: every Sunday, 8:00–14:00, at Puerto de Mazarrón.
The Camposol Thursday Market runs 8:30–14:30. Most stalls are set up first thing and the last ones pack away towards the end of that time.
Yes: Cartagena (Wednesday); Águilas (Saturday) and Los Alcázares (Tuesday).
Days and times can change on public holidays or during the town's feria — if you're making a special trip, check with the town hall.