Peak Season⭐ Top Pick

Stewart Island in September 2026

Southern Lights seekers who want to combine aurora watching with a once-in-a-lifetime wild kiwi encounter. Here's everything you need to plan your September visit.

✦5/10

🌡️ Weather in Stewart Island in September

8°C

Avg Temperature

cool — mid-weight layers recommended

Dark Hours / Night

Some darkness — limited aurora viewing window

🟠 Low

Aurora Likelihood

Aurora unlikely but not impossible — short windows with high solar activity

September in Stewart Island sits at 8°C average, which is cool — mid-weight layers recommended. Expect around 7 hours of darkness each night. Pack accordingly and check the detailed packing list below.

🌌 Aurora Australis in September

🟠 Low likelihood· Aurora score 5/10

Stewart Island has a base aurora score of 5/10. In September, aurora chances are limited — only 7 hours of darkness and typically lower Kp levels reduce visibility. Patience and luck are required.

Tips for aurora chasing in September: Head away from town light pollution, check real-time Kp forecasts (apps like SpaceWeatherLive or My Aurora Forecast), and allow at least 3 nights to maximise your chances of a sighting.

🎯 What to Do in Stewart Island in September

✓Kayaking

✓Hiking & Trekking

✓Wildlife Watching

✓Southern Ocean Wildlife

✓Photography Tours

Activity availability depends on snow / ice conditions and local operator schedules. Always confirm in advance.

🎒 What to Pack for September in Stewart Island

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Moisture-wicking base layer, fleece jacket, and a wind/waterproof outer layer

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Sturdy waterproof footwear — conditions can turn quickly

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A warm hat and light gloves for evenings and windy conditions

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Dry bag for electronics; most operators provide drysuits but check in advance

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Sea sickness prevention if boat trips are planned

📦 View the full interactive packing list for Stewart Island →

🏨 Accommodation in September

Peak Season

This is peak season — book accommodation 2–4 months in advance. Expect prices around $60+/night for mid-range options. Popular choices include Oban guesthouses, Backpacker lodges, Luxury eco Lodges. Aurora lodges and glass cabins sell out fastest.