Chasing the Aurora

You’ve got the best chance of seeing the Southern Lights from the deep south of New Zealand on clear, moon-free nights between autumn and winter (roughly March–September). Wait for a geomagnetic storm (high Kp index) and head somewhere dark with an unobstructed southern horizon - Stewart Island, The Catlins, southern Southland, and the Dark Sky Reserve around Lake Tekapo are top picks. Use a combination of short-term aurora forecasts and local cloud maps, and bring warm layers + a tripod.

When to go

• Best months: March → September (autumn through winter) nights are longer, skies are darker and clearer, which boosts your chances. Auroras can still occur outside this window if solar activity is strong, but seasonality helps a lot.

• Best hours: peak activity is usually late evening to early morning (rough guideline: 10pm–3am), though strong storms can produce earlier/longer shows.

Best NZ locations

Choose southern latitude + low light pollution + good southern horizon.

• Stewart Island / Rakiura - arguably NZ’s most reliable spot when conditions line up (very dark, southern latitude).

• The Catlins (e.g., Curio Bay, Slope Point) - remote, very dark southern coastline with great horizon views.

• Invercargill & Bluff (outer areas) - accessible spots with good southern views; head away from town lights.

• Lake Tekapo / Mt John Observatory - inside a Dark Sky Reserve and often recommended for aurora and stargazing; altitude helps with horizon views.

• Fiordland / Milford & Doubtful Sound areas - remote and dark, but weather can be changeable - when clear, they’re spectacular.

• Queenstown - If you head out towards Glenorchy way where there isn't much light pollution, you can get some amazing shots!

Apps & forecast tools to use

Use several sources together - one for geomagnetic activity, one for short-term forecasts, and one for cloud cover.

1. My Aurora Forecast & Alerts (mobile) - gives Kp forecasts, probability maps, push alerts.

2. NOAA / SWPC Aurora Dashboard & 30-minute OVATION forecast - short-term global aurora forecasts (very useful within the last few hours).

3. Aurora Alert - Otago (local service) - free local alert service focused on southern NZ visibility.

4. SpaceWeatherLive / SpaceWeather - Kp index, solar wind, and storm strength info.

5. MetService / local satellite & cloud maps - cloud cover will kill your chances quicker than anything else; always check before you head out.

How to read the forecasts (simple)

• Kp index: scale 0-9. For aurora visible from southern NZ you’re usually looking for Kp ~4+ for southernmost NZ, Kp 5–7 for strong displays that push further north.

• Timing: OVATION gives 30–90 minute short-term maps - use that right before you head out.

• Clouds & moon: a high Kp with full cloud cover or bright moonlight will still leave you empty-handed. Always cross-check cloud forecasts and moon phase.

Photography & viewing tips

• Gear: DSLR or mirrorless, sturdy tripod, wide fast lens (e.g., 14-35mm, f/2.8 or faster), remote shutter or intervalometer, spare batteries (cold kills batteries fast).

• Settings (starting point): manual mode - f/2.8, ISO 1600–6400, exposure 6-25s (shorter for active aurora; longer for faint glows). Focus to infinity (use live view + brightest star). Test exposures and reduce ISO or shutter if stars trail.

• Composition: include a foreground (tree, hut, coastline) to give scale; aim slightly above the southern horizon. Bring a headlamp with red light so you don’t wreck night vision.

• When it’s weak: stack multiple shorter exposures in post to pull out faint color. When it’s strong and moving, shorten shutter times to keep structure and motion.

What to bring / safety

• Warm layers (windproof + insulated), beanie, gloves.

• Thermos, snacks.

• Headlamp (red mode), warm boots, and a bivvy or blanket if you plan to wait.

• Phone + offline map, but don’t rely on reception in remote southern spots. Tell someone where you’re going if you’re heading to isolated coastlines.

• Beware of cliffs/coastal hazards in the dark - bring a torch and know your route.

Practical local tips

• Escape light: even small towns wash the southern horizon - drive 10–30 minutes away for better views.

• Moon phase: aim for new moon → ±3 days for darkest skies.

• Multiple nights: if you really want a good chance, plan multiple nights in a dark location - aurora is weather + solar activity dependent.

• Stay flexible: solar storms can be forecast 24–72 hours ahead but often peak short-term - set up push alerts on an aurora app plus check SWPC the night of.

Quick checklist

• Apps: My Aurora Forecast, NOAA/SWPC dashboard, local cloud map (MetService), AuroraAlert (Otago)

• Gear: camera, wide fast lens, tripod, spare batteries, red headlamp

• Clothing: insulated layers, waterproof outer, warm boots, beanie, gloves

• Timing: March-September, 10pm-3am, new moon nights, Kp 4+ (southern NZ)

• Locations: Stewart Island, The Catlins, Lake Tekapo/Mt John, Fiordland, Bluff/Invercargill

Final pro tip

Set two alerts: one for a Kp/aurora alert (so you know a storm is coming), and one for short-term OVATION/NOAA (so you know when it’s actually en route). Then check satellite cloud cover 30–90 minutes before heading out. If both line up - go.

ENJOY! It is such a magical experience 😊