Tunnel BeachTunnel Beach sits on a rugged stretch of coast with sea-carved sandstone cliffs, natural arches and caves; the site lies about 7.5 kilometres southwest of Dunedin and is reached by a coastal reserve track. The walk to the top of the tunnel winds down from roughly 150 metres above sea level for about 1.2 kilometres and finishes at a headland near a prominent sea arch.
The tunnel was dug in the 1870s by local politician John Cargill for his family and still shows rough-hewn hand marks. Originally a simple slope, concrete steps were added when the tunnel was opened to the public in 1983, and the passage descends another 72 steps to the beach, with only dim natural light inside.
Access is via a Department of Conservation reserve and the track is a popular walking excursion, though it can be steep and slippery after rain. Swimming is not recommended because of a strong rip current and visitors have needed rescue in the past; check local advice and current access conditions before you go.
- Hand-cut tunnel and steps: Examine the rough-hewn walls and steps that descend to the beach, showing the marks of the 19th-century hand excavation.
- Sea arch: A dramatic natural sea arch close to the tunnel entrance offers striking coastal views and photo opportunities.
- Cliffs and sandstone caves: Explore the sea-carved cliffs and small caves from safe viewpoints along the track and headland.
- Coastal viewpoints on the track: The 1.2-kilometre approach includes several high viewpoints looking back toward the city and out to the Pacific.
Best Time to Visit Tunnel Beach#
Milder, drier months give the safest and most pleasant experience for the coastal walk and views; the site is visited year-round but conditions change with seasons.
Weather & Climate near Tunnel Beach#
Tunnel Beach's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in January) and cold winters (coldest in July). Temperatures range from 1°C to 20°C. Moderate rainfall (722 mm/year).
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Good | 10° - 20° | 15° | 67 mm | overcast | 80% | 6.6 m/s | 2.1 extreme | 15.0h |
| February | Good | 9° - 20° | 15° | 65 mm | overcast | 80% | 6.1 m/s | 1.7 very high | 13.8h |
| March | Very Good | 9° - 19° | 14° | 53 mm | partly cloudy | 81% | 5.6 m/s | 1.1 high | 12.2h |
| April | Good | 6° - 16° | 11° | 54 mm | overcast | 82% | 5.1 m/s | 0.5 moderate | 10.6h |
| May | Acceptable | 4° - 13° | 6° | 67 mm | partly cloudy | 84% | 5.5 m/s | 0.2 low | 9.3h |
| June | Acceptable | 2° - 11° | 3° | 89 mm | partly cloudy | 85% | 5.4 m/s | 0.1 low | 8.6h |
| July | Good | 1° - 11° | 2° | 53 mm | partly cloudy | 84% | 5.3 m/s | 0.1 low | 8.9h |
| August | Good | 2° - 12° | 4° | 53 mm | partly cloudy | 84% | 5.3 m/s | 0.3 low | 10.1h |
| September | Acceptable | 4° - 14° | 6° | 61 mm | overcast | 81% | 6.0 m/s | 0.6 moderate | 11.6h |
| October | Good | 5° - 16° | 11° | 31 mm | overcast | 79% | 6.1 m/s | 1.1 high | 13.2h |
| November | Good | 7° - 17° | 12° | 51 mm | overcast | 79% | 6.9 m/s | 1.6 very high | 14.7h |
| December | Good | 9° - 19° | 14° | 78 mm | overcast | 80% | 6.3 m/s | 2.0 extreme | 15.4h |
How to Get to Tunnel Beach#
The nearest city is Dunedin; the site is about a 10-20 minute drive from central Dunedin depending on traffic. The closest airport is Dunedin Airport and the nearest main rail hub is Dunedin Railway Station in the city.
The reserve car park and trackhead lie off Blackhead Road; from there the track descends roughly 1.2 kilometres to the tunnel and beach. Visitors normally reach the reserve by car or taxi from Dunedin; check local maps or the DOC website for the exact track entrance and current access information.
Tips for Visiting Tunnel Beach#
- Wear sturdy, grippy footwear - the track is steep and can be very slippery after rain.
- Do not swim at Tunnel Beach; there is a dangerous rip and people have needed rescue in the past.
- Bring a torch if you plan to go through the tunnel, as it is dimly lit naturally.
- Avoid the descent after heavy rain or during very windy conditions and check for any local closures before setting out.
- Tide and weather conditions affect safety on the shore - plan your visit for when sea conditions are calm.