Live aurora forecast

Northern lights in Strahan tonight

West Coast, Tasmania, Australia · 53° magnetic latitude · Kp 3-4 threshold

Aurora visibility · Strahan
1/9
Unlikely tonight

Kp 1 is well below the Kp 3-4 threshold needed for aurora to be visible from Strahan.

QuietStormExtreme
Threshold
Kp 3-4
Magnetic latitude
~53°S
Bz ↓ south
- nT
Solar wind
- km/s
Density
- p/cm³
Cloud
-
Conditions right now: - Kp + Bz + solar wind + cloud + moon

Updated: 12 Jul, 22:45 UTC

7-day outlook for Strahan

Today
12 Jul
1
Quiet
Tomorrow
13 Jul
3
Possible
Tue
14 Jul
3
Possible
Wed
15 Jul
3
Possible
Thu
16 Jul
3
Possible
Fri
17 Jul
3
Possible
Sat
18 Jul
3
Possible

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

auroratonight.space

What Kp is needed here?

Strahan sits at a magnetic latitude of approximately 53°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 3-4 before the auroral oval expands far enough north to be visible from here.

At Kp 3-4, visibility is possible from Strahan but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Plan your viewing

Best dark sky sites near Strahan

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

Ocean Beach

Get directions ↗
Bortle Class 1-2 - Exceptional dark sky 5 km west of Strahan township - approximately 10 minute drive

A 33 km stretch of exposed Southern Ocean beach west of Strahan - one of the most direct southern horizon positions accessible by road in Tasmania. The beach faces west-southwest over open ocean with no land between it and the Roaring Forties. At night the sky is dark to the horizon in every direction. Bortle Class 1-2 conditions. The beach is accessible via the Ocean Beach Road from Strahan. The sand is soft and vehicles should stay on the access track. Powerful surf and dangerous rip currents make this a look-don't-enter beach, but aurora australis above the surf line is visible from the car park and dune crest. At Kp 3-4, a green arc or structured aurora may appear above the western and southwestern horizon.

Macquarie Harbour

Get directions ↗
Bortle Class 1-2 - Exceptional dark sky Within Strahan township

The harbour behind Strahan faces south across the sheltered water of Macquarie Harbour, Australia's second-largest natural harbour. The harbour entrance - Hells Gates - opens south toward the open ocean. On calm nights the harbour surface gives aurora reflections when the display is strong enough. The boat ramp and foreshore south of town face south-southwest across dark water. Strahan township generates minimal light - most of it faces north and east, leaving the southern horizon relatively unaffected. Bortle Class 1-2 conditions on the harbour's southern shore. A practical viewing position without leaving town.

Franklin-Gordon Wild Rivers National Park

Get directions ↗
Bortle Class 1 - Exceptional dark sky 30-60 km southeast of Strahan

The wilderness national park east and south of Strahan. The Lyell Highway passes through the northern edge. River gorges, ancient Huon pine forests, and complete absence of artificial light define this area. Bortle Class 1 conditions across most of the park. Accessible viewpoints along the Lyell Highway give south-facing positions above the treeline. Lake Burbury (40 km east on the Lyell Highway) gives open lake-surface sky with wilderness surrounds. This is genuine wilderness - carry emergency supplies and tell someone your plan. No phone reception in the gorges. The Kp 3-4 threshold combined with Bortle Class 1 sky gives some of the best aurora australis conditions achievable from a road-accessible position in mainland/island Australia.

When to go

Best time to see the aurora australis in Strahan

Strahan'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.

Up to 8 locations

Strahan

Australia

Unlikely
Kp 1 need Kp 3-4
Checking darkness…
Cradle Mountain

Australia

Unlikely
Kp 1 need Kp 5
Checking darkness…
Hobart

Australia

Unlikely
Kp 1 need Kp 5-6
Checking darkness…
The odds

How often does the aurora appear in Strahan?

Average nights per month the Kp reached Strahan's threshold of 3+, from 15 years of geomagnetic data (2010–2024).

10.2Jan
11.2Feb
13.6Mar
12.4Apr
10.7May
9Jun
10.1Jul
12.3Aug
13.2Sep
12.8Oct
10.3Nov
9.3Dec

Counts the Kp 3+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0

Make it happen

Plan your trip to Strahan

Based on 15 years of geomagnetic data (2010–2024)

1st
March
13.6
avg aurora nights
Stay 3+ nights for 80% chance
2nd
September
13.2
avg aurora nights
Stay 3+ nights for 80% chance
3rd
October
12.8
avg aurora nights
Stay 4+ nights for 80% chance

Best window

The August to October window averages 38 aurora nights - the strongest consecutive stretch of the year.

How long to stay

For your best chance in March, plan at least 3 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.

From the community

Aurora photographs from Strahan

Real photos sourced from Wikimedia Commons.

Aurora over StrahanAurora over Strahan
Aurora over StrahanAurora over Strahan
Aurora over StrahanAurora over Strahan
Aurora over StrahanAurora over Strahan
Aurora over StrahanAurora over Strahan
Aurora over StrahanAurora over Strahan
Questions

Common questions about aurora in Strahan

Can you see aurora australis from Strahan?
Yes, and conditions here are among the best in Australia. Strahan sits at 53°S magnetic latitude on Tasmania's west coast - the darkest and most southerly settled coastal area accessible by road in the state. Kp 3-4 is the threshold, which is a moderate geomagnetic event that occurs regularly during active solar periods. Ocean Beach (5 km west) gives Bortle Class 1-2 conditions facing directly over the Southern Ocean. Aurora australis is a regular occurrence here during storm events.
What Kp is needed for aurora at Strahan?
Kp 3-4 from Ocean Beach and the southern shore of Macquarie Harbour. At 53°S magnetic latitude, Strahan is Tasmania's west coast equivalent of Hobart for aurora threshold - in practice slightly more southerly and considerably darker in sky terms. Kp 3-4 events occur several times per month during solar maximum, making Strahan one of the more frequently productive aurora positions in Australia.
Is Strahan practical to reach for aurora?
It requires planning. Strahan is 300 km from Hobart (3.5 hours) and 280 km from Devonport (3.5 hours) over mountain roads that require care. There is no public transport. Accommodation in Strahan is limited and books out quickly - plan well in advance if travelling for a specific storm event. The town has a general store, petrol, and a small number of guesthouses and lodges. It is worth the effort: the sky darkness and southern ocean exposure are genuinely exceptional, and the Franklin-Gordon Wild Rivers wilderness is one of the most remote road-accessible positions in the country.
How dark are the skies around Strahan?
Bortle Class 1-2 from Ocean Beach and the Franklin-Gordon Wild Rivers National Park - equivalent to the darkest areas of the Nullarbor Plain and significantly darker than most Tasmanian east coast or mainland south coast positions. The west coast has almost no settlement south of Strahan and the national park extends into true wilderness. On a clear night with Kp 3-4 in progress, aurora australis structure, colour variation, and movement are all visible to the naked eye from Ocean Beach.
When is the best time for aurora in Strahan?
May to August for the longest dark nights, though the west coast of Tasmania has significant rainfall and cloud throughout the year. The west coast receives more than 2,000 mm of rain annually - cloud cover is the main obstacle. Check the Bureau of Meteorology forecast carefully and look for multi-day clear spells rather than single clear nights. The September equinox is statistically the most active geomagnetic period. A clear night at Strahan with Kp 4+ in progress is a genuinely rare and worthwhile combination.
Photograph the aurora

Recommended gear

Tested picks for capturing the aurora on long, cold nights.

As an Amazon Associate, Aurora Tonight earns from qualifying purchases. Affiliate links never influence the forecast or which gear is recommended.

Aurora Tonight

Aurora Tonight

Add to your home screen for instant aurora alerts

Add to your home screen

Tap then Add to Home Screen for instant aurora alerts