Southern Alps
Mountains New Zealand mountain range with highest South Island peaks
New Zealand’s Southern Alps run the length of the South Island, include Aoraki/Mount Cook and host glaciers. Tourists pursue mountaineering, heli‑flights, glacier walks and scenic rail and road journeys.
The Southern Alps are the main mountain chain running along the length of New Zealand’s South Island, stretching for roughly 500 kilometres and culminating at Aoraki / Mount Cook (3,724 metres). The range forms the island’s alpine backbone and contains many glaciers and high plateaus.
High peaks, glacier-carved valleys and alpine lakes dominate the visitor experience; established national parks and access roads give hikers and climbers routes into the range. The west coast hosts fast-flowing glaciers that descend unusually close to sea level, while the eastern slopes are drier and support alpine basins.
Skiing, mountaineering, heli-hiking and glacier tours are common visitor activities, with several lodges and visitor centres concentrated around key access points such as Aoraki / Mount Cook and the Franz Josef and Fox glacier valleys.
The Southern Alps have been uplifted by movement on the Alpine Fault where the Pacific and Australian plates meet, a process that continues today. The mountains and surrounding valleys have long cultural significance for Māori and were later mapped and explored during European settlement.
The range runs down the western spine of the South Island; Aoraki / Mount Cook sits in the central Southern Alps. Christchurch on the east coast is the nearest major city to the central/eastern approaches to the range.
- Scale and high point: The range runs for roughly 500 kilometres along New Zealand's South Island and includes Aoraki / Mount Cook at 3,724 metres.
- Glaciers and access: Glaciers such as Franz Josef, Fox and Tasman are on the wetter western flanks and provide accessible glacier valleys and guided glacier walks and heli-trips.
What to See #
- Aoraki / Mount Cook: New Zealand's highest mountain at 3,724 metres, a focal point for mountaineering and for access to alpine routes in the central Southern Alps.
- Tasman and other glaciers: A chain of glaciers and icefalls on the west side of the range feeding from the high alpine plateau; the Tasman Glacier is the longest glacier in New Zealand at roughly 23 kilometres.
- Arthur's Pass: A mountain pass and conservation area providing road access across the range and native alpine environments popular with hikers.
How to Get to Southern Alps #
Major access routes run from Christchurch (east) via State Highway 73 across Arthur’s Pass and from the west via SH6 along the West Coast (Hokitika-Greymouth-Fox Glacier). The TranzAlpine train (Christchurch to Greymouth) offers one of the most scenic rail approaches; regional flights and tourist shuttles link Queenstown, Wanaka and the Aoraki/Mount Cook area.
Tips for Visiting Southern Alps #
- If aiming for alpine huts (e.g., Mueller Hut, Sealy Tarns), book huts or guided climbs in advance through New Zealand's DOC or local operators.
- Take the TranzAlpine train (Christchurch-Greymouth) for a dramatic overland approach to Arthur's Pass and the western flanks of the range.
- Weather changes are fast - glacier walks need crampons and professional guides; do not attempt them unguided.
Best Time to Visit Southern Alps #
Best from late spring through early autumn (Southern Hemisphere seasons) for access to hiking and hut networks; winter is for experienced mountaineers only.
Weather & Climate near Southern Alps #
Southern Alps's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in February) and cold winters (coldest in July). Temperatures range from -4°C to 18°C. Heavy rainfall (3170 mm/year), wettest in December, distributed fairly evenly throughout the year.
January
January is cool with highs of 17°C and lows of 5°C. Heavy rain (230 mm).
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February
February is cool with highs of 18°C and lows of 5°C. Heavy rain (241 mm).
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March
March is cool with highs of 15°C and lows of 4°C. Heavy rain (247 mm).
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April
April is cold with highs of 12°C and lows of 2°C. Heavy rain (291 mm).
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May
May is cold with highs of 8°C and lows of -1°C. Heavy rain (309 mm).
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June
June is cold with highs of 6°C and lows of -3°C. Heavy rain (256 mm).
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July
July is the coolest month with highs of 5°C and lows of -4°C. Heavy rain (262 mm).
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August
August is cold with highs of 6°C and lows of -3°C. Heavy rain (232 mm).
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September
September is cold with highs of 8°C and lows of -2°C. Heavy rain (256 mm).
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October
October is cold with highs of 11°C and lows of 0°C. Heavy rain (232 mm) and breezy conditions.
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November
November is cold with highs of 13°C and lows of 2°C. Heavy rain (284 mm) and breezy conditions.
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December
December is cold with highs of 15°C and lows of 4°C. The wettest month with heavy rain (330 mm).
