Buzz
When planning a beach day, you’ve likely thought about entertainment (like a good book or sand toys for the kids) and snacks (perhaps the ultimate beach sandwich). But have you considered how much water to bring? Chances are, like many, you might not have packed enough.
While staying hydrated might seem less critical in daily routines—where regular fluid intake usually suffices—it becomes a priority during outdoor activities. Whether you’re hiking, spending a day at the beach, or embarking on any adventure with limited access to water, ensuring you have enough to drink is crucial.
A Step-by-Step Guide to Estimating Your Water Needs
Although scientific research on water requirements for beach lounging is limited, guidelines from studies on exercise, hiking, and camping provide a useful reference.
For activities considered 'moderate' in 'moderate' temperatures, REI suggests half a liter of water per person per hour. Beach days are often hotter, but physical activity is usually minimal. Half a liter equals a standard disposable water bottle, so for two people spending six hours at the beach, or four people spending three hours, a 12-bottle case would suffice. (Opting for reusable bottles is more environmentally friendly, but this example is for illustrative purposes.)
On particularly hot days, you’ll require more water. Sweating and even breathing contribute to fluid loss, so increased sweating means greater hydration needs. A more liberal guideline suggests hikers bring one full liter per hour (equivalent to two disposable bottles).
Deciding which guideline to follow is up to you. If you often find yourself parched after a beach day, it’s wise to pack more water than you anticipate needing.
Can other beverages contribute to your hydration needs?
Great news: other beverages can help with hydration too! While water is the most straightforward option, drinks like sodas, fruit juices, lemonade, and even water-rich foods such as popsicles and watermelon contribute to your fluid intake. This also includes caffeinated beverages, which are far less dehydrating than commonly believed.
However, it’s best to exclude alcohol from your hydration calculations. Alcohol does have a dehydrating effect, so it’s wise to alternate between alcoholic drinks and water if you’re indulging during the day. Make sure to pack the suggested amount of water alongside any beers or cocktails you plan to enjoy.
