Hummanaya, Natural blowhole in Kudawella, Sri Lanka
Hummanaya is a natural blowhole on the Kudawella coast where seawater is forced upward through a rock crevice. The water jet shoots up to 25 meters high, creating a powerful display against the rocky shoreline.
Geological processes over thousands of years have shaped this coastal formation. Fishermen historically used it as a navigational landmark to guide their boats along the shore.
The name Hummanaya comes from the distinctive sound that echoes when water rushes through the underground cavern system. You can hear this characteristic noise yourself when the water jet erupts.
A viewing platform offers clear observation points for watching the water display, with the most frequent eruptions happening between November and April. The phenomenon works best when waves are strong and the tide brings heavy swells to shore.
This is the second largest blowhole in the world and the only known example of its kind in Sri Lanka. This rarity makes the formation a truly unusual geological site to visit on the island.
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