Formed when the roof of a large subterranean cave was eroded by the sea, compressed waves explode out of the blowhole in an impressive display.
Jack’s Blowhole is a spectacular blowhole in Tunnel Rocks Scenic Reserve. It is 55 metres deep, some 200 metres from the sea. It was formed when the roof of a large subterranean cave was eroded by the sea and fell inwards. Heavy swells from the southern ocean can create an impressive display; waves are compressed through the underground tunnel and explode out of the blowhole to roaring sound effects from both the water and the surge of expelling air. For your own safety, do not lean or climb over the fence around the blowhole.
The 40 minutes to 1 hour return easy walk to the blowhole is accessed from Jack’s Bay. The route is across private land, marked by painted poles. Follow them and use the stiles rather than the gateways, respecting the access provided by the landowner. The track is closed during lambing season, 1 September – 1 November.
Like the nearby Jack's Bay, Jack's Blowhole is named after the famed Māori Ngāi Tahu chief, Tuhawaiki, known to early European settlers as Bloody Jack.
- Natural Attraction
- Free Things to Do
- Outdoor Activities
- Less than half day
- Scenic Photo Point
- Scenic Attraction
- Walking & Tramping