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Northern lights in Bayonne tonight

Real-time aurora forecast for Bayonne (Nouvelle-Aquitaine) - latitude 43.49° N, estimated Kp threshold 9.

Kp index
3.0unsettled
Hemispheric power
North45GW
South48GW

Source: app.pulsar-si.com

Tonight in Bayonne
Very unlikely
Based on Kp 3.0 and Bayonne's latitude.

Seeing the northern lights from Bayonne

Bayonne, at 43.5° N, lies at the end of the Atlantic coast at the foot of the Basque Pyrenees. Seeing an aurora here is exceptional, but the May 2024 storm produced a memorable show, visible from Hendaye beach and La Rhune. The proximity of the ocean to the north-west offers a clear horizon, and Basque hills provide accessible high points for observation far from coastal light pollution.

Observation conditions in Bayonne

Bayonne is rated Bortle 5, remarkable for a city of this size. Heading into the Basque hinterland (Iraty, Arbailles forest), Bortle 2-3 is reached in under an hour. The Iraty massif has been an International Dark Sky Reserve since 2021, one of the few such labels in western Europe. The climate is often humid but post-storm nights deliver exceptional transparency.

Recent auroras from Bayonne

10-11 May 2024 (Kp 9): spectacular red and pink aurora photographed from the Basque corniche, La Rhune and Pyrenean passes. One of the most southerly auroras reported in France that night. For the 12 August 2026 eclipse, Bayonne is the French city with the highest obscuration (~96%).

Local conditions

Light pollution
Bortle 6 of 9
SQM 19.43 mag/arcsec²
Nearest darker sky
Saint-Bernard
2 km · Bortle 2

Kp forecast, next 3 days

Source: app.pulsar-si.com. For an aurora to be visible from Bayonne, Kp must exceed 9.

Sun 05 Apr
2.8
Expected max Kp

Frequently asked questions

Can you see the northern lights from Bayonne?
Yes, but rarely. Typically a Kp index of ≥ 9 is needed for the aurora to become visible from Bayonne (latitude 43.5° N). Major geomagnetic storms (Kp 8-9) that reach this latitude happen only a handful of times per 11-year solar cycle.
What Kp index is needed to see auroras from Bayonne?
The approximate Kp threshold for Bayonne is 9. Below that, auroras stay confined to high latitudes (Norway, Scotland). Above it, they gradually extend southward. A Kp of 10 gives a fair chance, 11 a strong one.
When is the best time to watch from Bayonne?
Auroras are a nighttime phenomenon, best observed between roughly 10 PM and 2 AM local time, when the geomagnetic pole is tilted towards the Earth's night side. In practice, peaks depend on when a coronal mass ejection arrives - activity can spike at any hour.
Where around Bayonne offers better conditions?
Move at least 40-60 km north of Bayonne to escape urban light pollution and gain 1-2 magnitudes of limiting magnitude.

Nearby cities

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