Did you know that the Knysna lagoon isn’t actually a lagoon?

The Knysna “lagoon” as most know it, is, by definition, an estuary. It is a common misconception, but why does this distinction matter? To understand why this body of water is so special, let’s look at the difference between the two.

Lagoon vs. Estuary: What’s the Difference?

A lagoon is characterised by a geological formation that acts as a barrier between the ocean and the lagoon itself. This could be a large sandbank, a coral atoll, or a barrier island. All of these create a physical separation from the ocean.

Lagoons often remain more saline (salty) than fresh because they aren’t continuously fed by a river. They play a vital role in housing various saltwater organisms, plants, and marine life.

An estuary, on the other hand, is formed when a submerged river valley fed by fresh water opens directly into the ocean. Because of this open connection, there is a constant tidal fluctuation. As the fresh and salt water mix, they create what is known as brackish water.

While certain estuaries will close due to sand buildup toward the mouth of the system, a healthy estuary is incredibly vital to an ecosystem. Because these systems are rich in nutrients, plant life, and shelter, they serve as crucial nurseries for juvenile marine life.

What Makes the Knysna Estuary so Special?

The Knysna estuary is the only natural estuarine bay in South Africa and the second-largest wetland in southern Africa! Its immense biodiversity positions it as a vital conservation area.

The estuary houses the second-largest salt marsh in the country, as well as the largest stand of Cape eelgrass. This unique vegetation is home to one of only two species of seahorse in the world classified as endangered – the Hippocampus capensis (Knysna seahorse).

Rich Marine Life: In the estuary, you’ll find an array of fish species including Spotted Grunter, Garrick, Dusky Kob, Cape Stumpnose, Shad, and White Steenbras. Dolphins, sharks, and Cape Fur Seals also move in and out of the system, while multiple species of crustaceans, like mud crabs, marsh crabs, mud prawns, and pink prawns, play an important role in the health of the environment.

The Best Way to Experience Knysna from the Water

For most people, the breathtaking beauty above the water is what brings both local and international tourists to Knysna. The Knysna lagoon is, without question, simply beautiful.

Characterised and guarded by the famous Knysna Heads, these two towering sandstone cliffs mark the dramatic entrance to the estuary and form the most iconic geological feature in the Garden Route.

The absolute best way to experience the Knysna Heads is from the water. A boat cruise with The Water Club from Thesen Island will take you right up to the cliffs, offering an amazing photographic opportunity.

Whether you choose a relaxing lagoon cruise or an adventure-filled day, there is so much to see on the estuary.

Things to see & do on the Knysna lagoon:

• Abundant marine and bird life
• Beautiful beaches
• The pristine Featherbed Nature Reserve
• Leisure Isle and the canals of Thesen Island
• The distant, dramatic backdrop of the Outeniqua Mountain Range

Sunsets from the water can be exquisite, and there truly is something for everyone to do. You can kayak the Thesen Island canals, embark on slow cruises with wine in hand, book exciting fishing charters, or reserve private luxury speedboat cruises for an exhilarating experience that is a cut above the rest.

The Knysna estuary is a cornerstone of the natural beauty that has put our region on the global map. It is completely natural, unforced, and ready to be enjoyed by all!