Uusimaa, FinlandMagnetic latitude 57.6°Population 20,96659 m above sea level
Northern lights in Mäntsälä
From Mäntsälä the aurora is visible on most active nights — first low to the north, from about Kp 2.3.
Right now
It is still light here. Darkness starts at 19:32.
Magnetometer at Nurmijärvi (39 km away): low magnetic activity.
Updates every minute while this page is open. Ground data: FMI MIRACLE R-index (CC BY 4.0).
Tonight in one minute
Not tonight
- Solar activity Enough for a camera: Kp 2 expected, 0.7 needed for photos, 2.3 for the eye.
- Sky Overcast (94% cloud).
- Darkness Dark from 19:32 to 06:36.
What to do: Not tonight — your next chance is shown just below.
Tuesday 20 October — Possible · Kp 5 · best around 06:00 · Forecast cloud: 84%. · Reliability: medium
Each box is one night: the colour shows the chance, the number the expected Kp. Tap a night for details.
📅 Add these nights to your calendar — it updates itself (.ics)
How far ahead can the northern lights be forecast?
- Minutes to an hour: satellites 1.5 million km away measure the solar wind before it reaches Earth. This is the surest warning — the “Right now” box uses it.
- 1–3 days: when the Sun throws out a cloud of particles, it takes one to three days to arrive. NOAA's 3-hourly forecast covers these nights; the timing can still be off by a few hours.
- 4–27 days: the Sun turns once every 27 days, and regions that disturbed Earth's field last time often do it again. NOAA's 27-day outlook gives this rough trend — new eruptions are not in it yet.
Tonight
Updated 10:31 local time
Unlikely
Best around 06:00. Forecast max Kp 2.0 (this place needs 2.3), average cloud 94%.
- Dark enough
- 19:32 – 06:36
- Sunset
- 17:59 · sunrise 08:09
- Moon
- 47% · ↑ 16:48 · ↓ 22:04
- Kp neededKp index: a 0–9 measure of geomagnetic activity. The higher it is, the further from the poles the aurora reaches.
- Kp 2.3
- Kp for photos
- In photos: from Kp 0.7 (a red glow low in the north).
- Look towards
- north (358°)
Cloud layers and weather
Low cloud blocks the aurora completely. Thin high cloud often still lets a bright aurora shine through, so a sky with only high cloud is worth a look.
| Time | Sun, 19 | Sun, 22 | Mon, 01 | Mon, 04 | Mon, 19 | Mon, 22 | Tue, 01 | Tue, 04 | Tue, 19 | Tue, 22 | Wed, 01 | Wed, 04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low cloud | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 2% |
| Mid cloud | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 5% |
| High cloud | 54% | 59% | 62% | 53% | 3% | 0% | 0% | 0% | 0% | 1% | 3% | 9% |
| Temperature | 4 °C | 2 °C | 1 °C | 1 °C | 4 °C | 2 °C | 2 °C | 1 °C | 4 °C | 2 °C | 2 °C | 3 °C |
| Feels like | 3 °C | 0 °C | 1 °C | 1 °C | 3 °C | 2 °C | 2 °C | 1 °C | 2 °C | -1 °C | 0 °C | 1 °C |
| Wind | 2 m/s | 2 m/s | 1 m/s | 1 m/s | 2 m/s | 1 m/s | 1 m/s | 1 m/s | 2 m/s | 2 m/s | 2 m/s | 2 m/s |
Cloud layers and weather: Open-Meteo (CC BY 4.0).
Score = activity (NOAA Kp and OVATION) × clear sky (MET Norway) × darkness × moonlight. Methodology
Seeing it right now?
Tell others in Uusimaa. Reports from real visitors move a place up the live ranking.
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Live webcams near Mäntsälä
Check the sky for yourself: public cameras within 300 km. They open on the camera owner's website.
These cameras belong to their owners — we only link to them. Most show little in daylight or under cloud, and some pause in summer.
What you would see from Mäntsälä
Facing north. Bands show where the aurora sits at two activity levels.
| Kp | What you see | Lower edge | Ray tops | Distance to the aurora |
|---|---|---|---|---|
| 2 | Faint glow, mostly on camera | 8° | 17° | 545 km |
| 3 | Visible to the north | 16° | 30° | 322 km |
| 4 | Visible to the north | 46° | 63° | 100 km |
| 5 | Overhead and all around | – | – | – |
| 6 | Overhead, and also to the south | – | – | – |
| 7 | Overhead, and also to the south | – | – | – |
| 8 | Overhead, and also to the south | – | – | – |
| 9 | Overhead, and also to the south | – | – | – |
The Kp scale in plain words
Kp is a 0–9 score for how strongly the Earth's magnetic field is being shaken by the solar wind. The higher it goes, the further from the poles the northern lights reach. Kp 0–2 is a quiet night; Kp 5 and above is a geomagnetic storm.
- Kp 0–2 Quiet next 24 h eye in Mäntsälä camera in Mäntsälä Only under the auroral oval: northern Norway, Swedish and Finnish Lapland, Iceland, Alaska, northern Canada.
- Kp 3 Unsettled Bright in the Arctic; low on the horizon in central Scandinavia and southern Iceland.
- Kp 4 Active Overhead in the Arctic; low in the north from southern Norway, Sweden, Finland and northern Scotland.
- Kp 5 Minor storm (G1) Scotland, southern Scandinavia, the Baltic states, the northern US states and southern Canada.
- Kp 6 Moderate storm (G2) Northern England, Denmark, northern Germany and Poland, the US Midwest — often clearer in photos than to the eye.
- Kp 7 Strong storm (G3) Most of the UK, the Netherlands, Germany, Poland, Czechia; red glow in photos from France and the northern Alps.
- Kp 8 Severe storm (G4) Central Europe to the eye; red sky in photos from northern Italy, Spain, the Balkans and Turkey's Black Sea coast.
- Kp 9 Extreme storm (G5) Seen across Europe and the US; in photos as far south as the Mediterranean, Turkey and North Africa (May 2024).
Light pollution
City sky. City lights hide all but the brightest displays. Plan to leave the urban area.
A noticeably darker area starts about 5 km to the east-south-east. Open in OpenStreetMap
Estimate from NASA VIIRS night-light data (sky-glow model within 50 km). Check access and private land before you go.
Hills and mountains
The horizon towards the north is open (terrain below 0.5°), so low aurora is not blocked.
From elevation data (AWS Terrain Tiles) along seven lines of sight up to 30 km.
Best months to see the aurora in Mäntsälä
Share of nights 2005–2025 that were dark, active enough here and mostly clear.
September has been the best month (22% of nights), followed by March (18%).
| Month | Good nights | Clear nights | Darkness | Low / high |
|---|---|---|---|---|
| September | 22% | 48% | 7.8 h | 8° / 15°C |
| October | 14% | 30% | 10.6 h | 2° / 8°C |
| November | 6% | 14% | 13.0 h | -2° / 2°C |
| December | 8% | 17% | 14.1 h | -7° / -2°C |
| January | 10% | 22% | 13.6 h | -10° / -5°C |
| February | 12% | 26% | 11.6 h | -10° / -5°C |
| March | 18% | 38% | 8.9 h | -7° / 0°C |
| April | 13% | 42% | 5.3 h | -1° / 8°C |
Darkness through the year
- No full darkness (Sun 12° below the horizon) from 8 May to 4 August — the sky stays too bright for most auroras.
- Next new moon 9 November, next full moon 26 October. The darkest skies are in the week around new moon.
Aurora nights in Mäntsälä since 1995
Nights when Kp reached 4.7 or more while it was dark here.
Most recent strong nights
- 10 October 2026 · Kp 7.3
- 4 October 2026 · Kp 5.7
- 18 August 2026 · Kp 5.3
- 15 May 2026 · Kp 6.0
- 20 April 2026 · Kp 5.0
- 3 April 2026 · Kp 5.7
- 2 April 2026 · Kp 5.0
- 22 March 2026 · Kp 6.7
Practical information
- Nearest airport
- Helsinki Vantaa Airport (HEL) · 40 km
- Typical low / high in September
- 8° / 15°C
- What to wear
- Cool nights: layers, a windproof jacket, hat and gloves for standing still outside. Full clothing guide
- Emergency number
- 112
- Winter driving
- Winter tyres are mandatory from 1 November to 31 March when weather or road conditions require them. Minimum tread is 3 mm, and since December 2024 non-studded winter tyres need the three-peak mountain snowflake symbol. Studded tyres may be used from 1 November to 31 March or until the Monday after Easter. Fintraffic's Liikennetilanne (Traffic Situation) service shows road conditions and road weather cameras. Road conditions
- Access to land
- Everyman's right (jokamiehenoikeus) lets anyone move about, and camp or stay temporarily, in the countryside regardless of who owns it, without permission. It does not cover yards, cultivated land or other specially designated areas, nor activities that damage nature or disturb others.
- Official space-weather service
- Finnish Meteorological Institute: Auroras and space weather · FMI Auroras Now! (all-sky cameras) · ISES RWC Finland (FMI)
- Weather service
- Finnish Meteorological Institute (FMI)
Questions and answers
What Kp do you need to see the aurora in Mäntsälä?
From Mäntsälä the aurora is visible on most active nights — first low to the north, from about Kp 2.3.
Which way should I look for the aurora in Mäntsälä?
Face north (about 358° from true north). At Kp 2.3 the lower edge of the aurora sits roughly 16° above the horizon; stronger activity lifts it higher and further across the sky.
What is the best month to see the aurora in Mäntsälä?
Over 2005–2025, September gave the best odds in Mäntsälä (22% of nights dark, active enough and mostly clear), followed by March (18%).
When is the aurora season in Mäntsälä?
From 8 May to 4 August the sky in Mäntsälä never gets dark enough. Outside that period the aurora can be seen whenever activity and clouds allow.
Is there much light pollution in Mäntsälä?
City lights hide all but the brightest displays. Plan to leave the urban area. A noticeably darker area starts about 5 km to the east-south-east.
When was the aurora last possible in Mäntsälä?
Activity last reached storm level (Kp 5 or more) during darkness in Mäntsälä on 10 October 2026 (Kp 7.3) — 883 such nights since 1995. Here the aurora also appears on many quieter nights.
Also covered by this forecast
Villages and districts around Mäntsälä share its forecast: within a few kilometres the sky, the Kp needed and the best direction are the same.
- Meijerinpelto 0 km
- Haapa-Junttila 0 km
- Koivumäki 1 km
- Koskenranta 1 km
- Valkamanpelto 1 km
- Arvonpelto 1 km
- Mallamäki 1 km
- Liettonoja 1 km
- Leppäniemi 1 km
- Mustamäki 1 km
- Jokihuhta 1 km
- Riihenmäki 1 km
- Pitkäaro 1 km
- Kaunismäki 2 km
- Pietilä 2 km
- Männikkö 2 km
- Kapuli 2 km
- Jurvalanpelto 2 km
- Anttila 3 km
- Mäntsälä 4 km
- Invalidikylä 4 km
- Hirvihaara 5 km
- Mäkipuoli 5 km
- Koskelanmäki 5 km
- Isokylä 5 km
- Mattila 5 km
- Sääksjärvi 6 km
- Lukko 6 km
- Metsäkulma 6 km
- Jokivarsi 6 km
- Soukkio 7 km
- Ojankulma 7 km
- Herman Onkimaa 8 km
- Numminen 8 km
- Kaukalampi 8 km
- Hakkari 8 km
- Lakehisto 8 km
- Lukonkulma 8 km
- Katajasuo 9 km
- Järvenpää 9 km