Since the novel coronavirus was reported (December 2019), the virus spread rapidly breaking through frontiers and impacting almost all countries of the world. Tourism is one of the sectors that has been heavily affected by the crisis. Even though there are several protocols for tourism activities that were written for the austral summer season, at the present, physical distancing is considered an effective way to reduce the spread of the virus. Clear and simple public actions should be rapidly implemented by the authorities to minimize the number of people on the beach. For instance, increasing the number of accesses to the beaches, building parking lots adjacent to the farthest beaches, or opening coastal roads on the outskirts of town to expand usable beaches, would be some simple and direct measures to reduce the beach population density. A simple analytical formulation for assessing the percentage decrease of the static population density respect to the absolute maximum population density on a beach is described in this paper. The variables of this simple analytical tool are the instantaneous sea-level (tide), air temperature, and beach expansion. Beach expansion is the single and manageable variable of the formulation, and refers to the inclusion of some near or adjacent extension of beach. It is suggested that the expansion of beaches would be very useful not only for pandemic time but also for the new normality. An application of this methodology is presented in the municipality of La Costa, Argentina.

自新型冠状病毒被报道以来（2019 年 12 月），病毒迅速突破国界传播，波及世界几乎所有国家。旅游业是受危机严重影响的行业之一。尽管针对南半球夏季制定了多项旅游活动规程，但目前，保持身体距离仍被认为是减少病毒传播的有效方法。当局应迅速采取明确而简单的公共行动，以尽量减少海滩上的人数。例如，增加海滩的入口，在最远的海滩附近建设停车场，或在市郊开辟沿海道路以扩大可用海滩，都是减少海滩人口密度的一些简单直接的措施。本文描述了一个简单的分析公式，用于评估静态人口密度相对于海滩上绝对最大人口密度的百分比下降。这个简单分析工具的变量是瞬时海平面（潮汐）、气温和海滩扩张。海滩扩展是公式中单一且可管理的变量，指的是包括一些附近或相邻的海滩延伸。有人建议，扩大海滩不仅对大流行时期非常有用，而且对新常态也非常有用。阿根廷拉科斯塔市展示了这种方法的应用。