Waterfall swimming may seem like an activity you’d only find on postcards, but in Hawaii, it’s possible. However, before you plan your trip, make sure you enjoy this once-in-a-lifetime adventure safely with the following tips.

A Guide to Safe Swimming at a Waterfall

1. Heed Posted Warnings

First, you’ll want to make sure the destination allows swimming. Posted warning signs will provide information about whether the area is safe for swimming, or whether it’s even permitted. Many parks and destinations also post their rules online.

Before you jump in, you should also check with any park staff about conditions. Because the intensity of the rapids can change quickly, some waterfalls will have designated conditions, such as regular, limited, or prohibited swimming.

2. Stay Out of the Direct Fall of Water

Don’t be tempted to swim directly under the falling water. Its force is far greater than you might expect and can cause you to lose your bearings or submerge you. Even if the conditions appear calm, enjoy the falling rapids from a distance and swim far enough away that you won’t be treading through their path.

3. Wear Protective Gear

Even if you’re an experienced swimmer, you may be required to wear protective gear at the swimming spot. Not only will this satisfy local rules, but it will also help to keep you safe. A life vest will keep you afloat even if unforeseen risks develop because of changing currents, other guests, or temperature fluctuations.

If you’re looking to enjoy swimming at a breathtaking waterfall, head to Waimea Valley on Oahu. Featuring a 45-foot waterfall that cascades into a 30-foot deep pond, this sprawling park allows swimming with life vests included in the cost of admission (conditions permitting). Find out more about swimming in the park by visiting their website or calling (808) 638-7766.