Northern lights in Mayo tonight
County Mayo, Ireland · 54° magnetic latitude · Kp 4–5 threshold
Kp 1 is well below the Kp 4–5 threshold needed for aurora to be visible from Mayo.
7-day outlook for Mayo
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Mayo sits at a magnetic latitude of approximately 54°N. 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 4–5 before the auroral oval expands far enough south to be visible from here.
At Kp 4–5, visibility is possible from Mayo 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 Mayo
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Keem Bay, Achill Island
Get directions ↗Keem Bay sits at the far western end of Achill Island, reachable only by a single-track road that climbs over Minaun Heights before descending to the bay. The road ends at a small beach car park. The bay faces west and north across open Atlantic water with no artificial light visible in any direction except the faint glow of Achill village far behind. It is one of the most genuinely dark accessible sites in Ireland.
Mullet Peninsula
Get directions ↗The Mullet Peninsula extends north from Belmullet into the North Atlantic, with open water on three sides. From the tip at Erris Head the horizon spans roughly 270 degrees of open ocean. Population on the peninsula is sparse and there are no towns to the north or west to produce competing light. The flat terrain gives unobstructed sky views from close to sea level. It is among the least light-polluted peninsulas in Ireland.
Ballycroy National Park
Get directions ↗Ballycroy is Ireland's largest uninhabited area, covering 11,000 hectares of Atlantic blanket bog on the Mayo coast between Achill and Bangor Erris. There are no settlements within the park. The open bogland gives wide sky views with an uninterrupted northern horizon. The park is accessible from the N59 near Ballycroy village. Light pollution readings here are comparable to Scotland's darkest upland areas.
Best time to see the northern lights in Mayo
Mayo's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Mayo's latitude.
April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.
Other Ireland aurora forecasts
How often does the aurora appear in Mayo?
Average nights per month the Kp reached Mayo's threshold of 4+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 4+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Mayo
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.
Related pages
Northern Lights Ireland
Ireland aurora hub - all counties with current Kp status.
Read →Northern Lights Donegal Tonight
Donegal - Ireland's top aurora county at 55°N magnetic latitude.
Read →Northern Lights Kerry Tonight
Kerry - Valentia Island and the Iveragh Peninsula.
Read →Northern Lights Galway Tonight
Galway - Connemara and the west coast.
Read →What Is the Kp Index?
What Kp 4-5 means at 54°N magnetic latitude.
Read →Planning your aurora trip
In-depth guides to help you plan a trip to see the northern lights.
Travel Guide Ireland Northern Lights Ireland - Complete Viewing Guide
Malin Head, Donegal, Mayo, and Kerry - the best locations for northern lights in Ireland, Kp thresholds, and why cloud cover is the real challenge.
Planning Ireland Best Time to See the Northern Lights in the UK
When aurora is most likely from Scotland, northern England, and Ireland throughout the year.
Travel Guide All destinations How to Plan a Northern Lights Trip
Destination, timing, accommodation, app setup, and how to read a space weather forecast.
