Brazilian city beaches are public spaces favoring citizens well-being. Urban studies relate built form and infrastructure with urban vitality and coastal studies underline uses as important for beach management, yet few researches relate form and infrastructure with beach uses. Understanding daily life as essential for public spaces and that spatial form relates with uses, this paper assesses time-based relationships between built and natural physical attributes and social life on the beaches of João Pessoa, a coastal city in North-east Brazil. Physical attributes are investigated at city scale - beach type, street network centrality and topography - and seafront scale - land uses, public/private interfaces, public infrastructure, beach sections and water quality. Beach social life was surveyed online, enquiring peoples' beach choice, visiting time and place, activities and evaluation. Infrastructure and street network follow topography and help configure shore and promenade for different landscapes. More central beaches have diverse land uses, well-equipped promenades and lighting and were popular night and day, while less central beaches had less infrastructure and were visited only by day. Findings highlight how physical attributes facilitate uses and, together with peoples’ evaluation, can inform urban beach design and planning.

巴西城市海滩是有利于公民福祉的公共场所。城市研究将建筑形式和基础设施与城市活力联系起来，沿海研究强调使用对海滩管理很重要，但很少有研究将形式和基础设施与海滩使用联系起来。了解日常生活对公共空间至关重要以及空间形式与用途相关，本文评估了巴西东北部沿海城市若昂佩索阿 (João Pessoa) 海滩上建筑和自然物理属性与社会生活之间基于时间的关系。物理属性在城市范围内进行调查——海滩类型、街道网络中心性和地形——以及海滨范围——土地利用、公共/私人界面、公共基础设施、海滩部分和水质。海滩社交生活在线调查，询问人们对海滩的选择，参观时间、地点、活动及评价。基础设施和街道网络遵循地形并帮助配置不同景观的海岸和长廊。更多的中心海滩拥有多样化的土地用途、设备齐全的长廊和照明设备，无论白天还是黑夜都很受欢迎，而较少的中心海滩基础设施较少，仅供白天参观。调查结果强调了物理属性如何促进使用，并与人们的评估一起为城市海滩设计和规划提供信息。而不太中心的海滩基础设施较少，只有白天参观。调查结果强调了物理属性如何促进使用，并与人们的评估一起为城市海滩设计和规划提供信息。而不太中心的海滩基础设施较少，只有白天参观。调查结果强调了物理属性如何促进使用，并与人们的评估一起为城市海滩设计和规划提供信息。