Tasman Lake Lake
Glacial lake at Tasman Glacier terminus
Born from Tasman Glacier melt at Aoraki/Mount Cook's eastern flank, Tasman Lake offers boat trips among icebergs, glacier viewpoints and alpine walks popular with hikers and landscape photographers.
Tasman Lake at a Glance#
Website: https://www.doc.govt.nz
Admission: Free (boat tours and guided activities charge separately)
About Tasman Lake#
Tasman Lake is a proglacial lake at the terminus of the Tasman Glacier in Aoraki/Mount Cook National Park on New Zealand’s South Island. It formed in the late 20th century as the glacier retreated and now contains floating icebergs calved from the glacier front.
The lake offers close-up views of the glacier terminus and surrounding alpine peaks; commercial boat trips provide guided iceberg and glacier-face sightseeing when conditions allow. Walking tracks and park viewpoints in the Tasman Valley and near the village of Aoraki/Mount Cook give access to different outlooks over the lake and river.
The Tasman River drains the lake through a braided channel down the valley; the shape and size of the lake change over time as the glacier continues to retreat.
- Origin and evolution: The lake is a relatively recent proglacial lake that formed as the Tasman Glacier retreated during the 20th century and continues to change as the glacier recedes.
- Boat tours: Boat excursions operate on the lake to view icebergs and the glacier face; commercial operators and seasonal conditions determine availability.
What to See#
- Tasman Lake: The broad proglacial lake at the terminus of the Tasman Glacier containing floating icebergs calved from the glacier front.
- Tasman River outlet: The braided Tasman River that issues from the lake and flows down the Tasman Valley toward the Hooker River system.
- Viewpoints and tracks: Park viewpoints and walking tracks in Aoraki/Mount Cook National Park that provide views of the lake, glacier terminus and surrounding peaks.
How to Get to Tasman Lake#
Tasman Lake is reached from Mount Cook Village (Aoraki/Mount Cook) on sealed roads, then by short walks or guided boat/heli excursions depending on operator. The Department of Conservation (DOC) maintains track information and safety advice for the area.
Tips for Visiting Tasman Lake#
- Early morning gives the best chance of still water and clear views of icebergs - afternoons often bring wind and chop.
- Book any boat or heli-assisted excursions in advance during peak season; operators limit group sizes for safety.
- Dress in layers and bring waterproof outerwear - glacier-fed lakes can be cold even on sunny days.
Best Time to Visit Tasman Lake#
Summer and shoulder seasons provide the most reliable access and clearer conditions for viewing icebergs and the Tasman Glacier terminus.
Weather & Climate near Tasman Lake#
Tasman Lake's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in February) and cold winters (coldest in July). Temperatures range from -3°C to 20°C. Heavy rainfall (2213 mm/year), wettest in May.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | 8° - 20° | 14° | 170 mm | - | - | 5.7 m/s | - | - |
| February | - | 8° - 20° | 14° | 130 mm | - | - | 5.6 m/s | - | - |
| March | - | 7° - 17° | 12° | 163 mm | - | - | 6.6 m/s | - | - |
| April | - | 4° - 14° | 6° | 248 mm | - | - | 5.5 m/s | - | - |
| May | - | 1° - 10° | 1° | 270 mm | - | - | 6.2 m/s | - | - |
| June | - | -2° - 6° | -2° | 177 mm | - | - | 4.2 m/s | - | - |
| July | - | -3° - 5° | -4° | 149 mm | - | - | 5.1 m/s | - | - |
| August | - | -2° - 8° | -2° | 144 mm | - | - | 6.1 m/s | - | - |
| September | - | 1° - 10° | 2° | 186 mm | - | - | 5.9 m/s | - | - |
| October | - | 3° - 13° | 5° | 160 mm | - | - | 6.3 m/s | - | - |
| November | - | 5° - 16° | 10° | 174 mm | - | - | 6.6 m/s | - | - |
| December | - | 7° - 18° | 13° | 242 mm | - | - | 5.7 m/s | - | - |
