All locations Australia St Helens

Aurora australis St Helens tonight

St Helens sits at 52°S magnetic latitude on Tasmania's northeast coast. Kp 4 is the threshold from Bay of Fires and Mount William National Park, where Bortle Class 2-3 beaches face the open Tasman Sea with aurora appearing to the south. The northeast coast is Tasmania's clearest region in winter. Peak season: May to August.

Aurora visibility - St Helens

Unlikely tonight

Kp 1 is well below the Kp 4 threshold needed for aurora to be visible from St Helens.

Current Kp

1

of 9

Threshold for St Helens: Kp 4 Magnetic latitude: ~52°S Updated: 28 May, 19:41 UTC
↓ Bz nT Solar wind km/s Density p/cm³
Conditions right now: Kp + Bz + solar wind + cloud + moon

7-day outlook for St Helens

Today

28 May

Quiet

Tomorrow

29 May

Quiet

Sat

30 May

Quiet

Sun

31 May

Quiet

Mon

1 Jun

Quiet

Tue

2 Jun

Quiet

Wed

3 Jun

Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

What Kp is needed here?

St Helens sits at a magnetic latitude of approximately 52°S. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 4 before the auroral oval expands far enough north to be visible from here.

At Kp 4, visibility is possible from St Helens but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Best dark sky sites near St Helens

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark southern horizon within reach.

Bay of Fires

Get directions ↗
Bortle Class 2-3 - Excellent dark sky 25 km north of St Helens - approximately 25 minute drive

One of Tasmania's most distinctive coastlines - white beaches, turquoise water, and orange lichen-covered granite boulders. The Bay of Fires faces east over the Tasman Sea. Aurora australis appears in the south to southeast from beach positions. At night the bay has no artificial light visible. Bortle Class 2-3 conditions. The Eddystone Point lighthouse at the northern end gives the furthest south-facing position in the bay. Anson's Bay and Binalong Bay at the southern end are more accessible and still face south-southeast over open water. The beaches are dark and quiet at night - no towns within 20 km to the east or south.

Binalong Bay

Get directions ↗
Bortle Class 2-3 - Excellent dark sky 10 km north of St Helens - approximately 10 minute drive

A small bay at the southern end of Bay of Fires, easily accessible from St Helens. The beach faces east and south-east with granite headlands. At night the bay is quiet and dark - minimal lighting from the small cluster of holiday houses. The southern horizon is open across George Bay and beyond. Position on the beach south of the houses for the best sky. At Kp 4, aurora australis is visible to the south-southeast from this position during a clear night. The lichen-covered boulders give distinctive foreground options for aurora photography.

Mount William National Park

Get directions ↗
Bortle Class 2 - Excellent dark sky 45 km north of St Helens - approximately 45 minute drive

A remote national park at the northeastern tip of Tasmania. Eddystone Point within the park has a lighthouse on a granite headland facing north and east over open Tasman Sea. The southern headlands of the park give south-facing positions across open water. Bortle Class 2 conditions - no towns within 50 km to the east or north. The park road is partly unsealed and requires a standard vehicle in good condition. Forester kangaroos are common on the road at night - drive carefully. The combination of coastal position, open horizon, and Bortle Class 2 sky makes this the highest-quality dark sky site directly accessible from St Helens.

Best time to see the aurora australis in St Helens

St Helens's aurora australis season runs from April through August, centred on the southern winter when nights are longest and darkest. The equinox months of March and September bring a boost in geomagnetic activity. Summer months bring too much twilight for aurora to show at this latitude.

Activity peaks around the March and September equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. These windows produce the strongest aurora australis events of the year for observers at this latitude.

October through February brings persistent twilight that washes out the aurora australis. Strong events during these months remain invisible because the sky never gets dark enough.

Compare nearby locations

Up to 4 locations

St Helens

Australia

Unlikely
Kp 1 need Kp 4
Checking darkness…
Launceston

Australia

Unlikely
Kp 1 need Kp 5-6
Checking darkness…
Hobart

Australia

Unlikely
Kp 1 need Kp 5-6
Checking darkness…

How often does aurora appear in St Helens?

Average nights per month when Kp reaches 4+ - based on 15 years of data

3.9
4.2
5.2
4.7
4.0
3.4
3.8
4.7
5.0
4.8
3.9
3.5
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best month

March

Average aurora nights per year

51

Kp threshold

4+

Based on 15 years of geomagnetic data (2010-2024). Shows nights when Kp reached 4+ at any point in the day - cloud cover and local darkness not included. Months with no astronomical darkness show zero.

Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0

Plan your trip to St Helens

Based on 15 years of geomagnetic data

1st

March

5.2

avg aurora nights

Stay 9+ nights for 80% chance

2nd

September

5.0

avg aurora nights

Stay 9+ nights for 80% chance

3rd

October

4.8

avg aurora nights

Stay 10+ nights for 80% chance

Best window

The August to October window averages 15 aurora nights - the strongest consecutive stretch of the year.

How long to stay

For your best chance in March, plan at least 9 nights.

Aurora activity peaks at the March and September equinoxes in both hemispheres. This is driven by the angle of Earth's magnetic field relative to the solar wind, not by local seasons. Winter months at this latitude offer longer dark nights for observing, but March and September average the highest number of aurora nights in the historical data.

Aurora photographs from St Helens

Aurora australis over St Helens

Aurora australis over St Helens

Tygadu55 · CC BY 3.0 · Source

Aurora australis over St Helens

Aurora australis over St Helens

User:JarrahTree · CC BY 2.5 au · Source

Aurora australis over St Helens

Aurora australis over St Helens

Wiki ian · CC BY-SA 3.0 · Source

Aurora australis over St Helens

Aurora australis over St Helens

Edoddridge · CC BY-SA 3.0 · Source

Aurora australis over St Helens

Aurora australis over St Helens

NASA · Public domain · Source

Aurora australis over St Helens

Aurora australis over St Helens

Thennicke · CC BY-SA 4.0 · Source

Common questions

Aurora australis from St Helens - Bay of Fires, Binalong Bay, and Mount William NP.

Can you see aurora australis from St Helens?
Yes. St Helens sits at 52°S magnetic latitude on Tasmania's northeast coast and needs Kp 4 for aurora australis. The Bay of Fires and Mount William National Park give Bortle Class 2-3 dark sky with south-facing ocean positions. Aurora australis appears to the south and south-southeast from the beaches. Tasmania's position as Australia's premier aurora state means the Kp 4 threshold here compares favourably to the Kp 5-7 needed from mainland locations.
What Kp is needed for aurora at St Helens?
Kp 4 from Bay of Fires and Mount William National Park. At 52°S magnetic latitude, St Helens is equivalent to Launceston and Devonport for aurora threshold. Kp 4 events are moderate geomagnetic activity and occur regularly during solar maximum. The dark sky advantage at Bay of Fires (Bortle Class 2-3) means faint aurora structure is detectable here at lower Kp than from more light-polluted sites at the same latitude.
Is Bay of Fires a good aurora location?
Yes, for aurora photography in particular. The orange lichen-covered granite boulders and white beaches give an unusual and distinctive foreground. The coastline faces east to south-southeast, so aurora appears to the south of the viewing direction on the south beach sections. Binalong Bay is the most accessible and still gives Bortle Class 2-3 conditions. Eddystone Point at the north end of the bay gives more southerly exposure but requires a longer drive. The bay is quiet at night with minimal light from the small holiday community.
When is the best time for aurora in St Helens?
May to August for the longest dark nights. Tasmania's northeast at 41.3°S geographic has around 13 hours of darkness in mid-winter. The September equinox is statistically the most active geomagnetic period. The northeast coast of Tasmania tends to be clearer than the west coast and southwest, making St Helens and Bay of Fires more reliably accessible during winter. Check BOM forecasts and compare with Launceston for current conditions.
How does St Helens compare to Launceston for aurora?
Both sit at approximately 52°S magnetic latitude and share a similar Kp 4 threshold. The difference is sky darkness and horizon access. Launceston is a city with a significant light dome; its best dark sky positions (Ben Lomond, Bay of Fires) require a long drive. St Helens is a small coastal town with Bay of Fires 10-25 km north and Mount William National Park 45 km away. For aurora observers based in northeast Tasmania, St Helens outperforms Launceston as a base simply because the dark sky is closer.

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