For most paddle board day trips a 10-liter dry bag is the right size: it holds a phone, keys, wallet, a snack, and a light layer with room to spare. Step up to 20 or 30 liters when you are packing a towel, lunch, and a change of clothes for a long day or an overnight. Sizing a dry bag is really about matching the bag to the length of your trip.
Think in three tiers. A 10-liter bag is the everyday choice for a couple of hours on the water, keeping the essentials dry and clipping easily to a deck bungee without getting in the way. A 20-liter bag steps up to a full beach day, with space for a towel, extra snacks, and a spare shirt. A 30-liter bag is the trip bag, sized for a picnic, layers for changing weather, or gear for two people sharing one board.
A couple of practical notes help you land on the right one. Roll-top dry bags need a few inches of empty space at the top to fold and seal properly, so a bag that is stuffed to the brim will not close as well. It is usually smarter to size up slightly than to cram a smaller bag full. And a sealed dry bag traps air, so it tends to float if it goes overboard, which is a nice safety margin for your phone and keys.
The NIXY 10L Waterproof Dry Bag ($29) covers the everyday paddle for most people, with larger sizes available when your trips get longer. One caution worth keeping: a dry bag protects your gear, it is not a personal flotation device, so wear a leash and a PFD on the water regardless of what is in the bag.
Frequently asked questions
Is a 10L dry bag big enough for paddle boarding? For a typical day paddle, yes. A 10-liter bag fits a phone, keys, wallet, a snack, and a light layer, which is all most paddlers carry for a couple of hours. If you regularly bring a towel and a change of clothes, look at 20 liters instead.
What size dry bag do I need for a full day or overnight trip? A 20 to 30-liter bag. Twenty liters handles a beach day with a towel and spare clothes, and 30 liters covers longer outings, a picnic, or gear for two people sharing a board.
Can a dry bag be too big for a paddle board? An oversized bag can be bulky on deck and shift around if it is only half full. Match the size to the trip and pack it reasonably full so it seals well and stays put under the bungee.
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