Interactive Arctic Circle Map
Explore an interactive Arctic Circle map near 66.56° N. Inspect longitude coordinates, learn about Arctic states, and understand the midnight sun and polar night limits.
The Arctic Circle is the approximate parallel near 66°33′ north latitude. It marks the southern limit where, under the ideal astronomical definition, at least one day each year can have 24-hour daylight and one can have 24-hour darkness.
Explore the Arctic Circle
Click the map to inspect a longitude on this approximate reference parallel. The displayed latitude is fixed for this map and does not update with Earth’s changing axial tilt.
Arctic Circle Map: Reference Details
66.5636° N (approx.)
A documented static cartographic reference; the astronomical line varies.
180° W to 180° E
Select a longitude with the input, slider, shortcuts, or map.
≈ 15,984.2 km
Ellipsoid parallel-length calculation, not a route distance.
OpenStreetMap tiles
Map tiles need an internet connection; attribution appears below the map.
How to Use the Arctic Circle
Use this free Arctic Circle map to explore longitude, coordinates, and the reference latitude line.
- 1Open the Arctic Circle map: Find the blue latitude line near 66.56° N. The map uses a fixed approximate reference, not a live astronomical boundary.
- 2Choose a longitude: Enter a longitude, move the slider, choose a country or region shortcut, or click the map to inspect a point along the reference parallel.
- 3Read or copy the coordinate: The selected point keeps the map latitude at 66.5636° N and updates its longitude in decimal and degrees-minutes-seconds formats.
- 4Explore polar daylight and Arctic regions: Use the guide to understand the June-solstice midnight-sun limit, the December-solstice polar-night limit, and commonly identified Arctic states.
An approximate Arctic Circle reference
This map uses 66.5636° N as a fixed cartographic reference for the Arctic Circle. Its astronomical latitude follows changes in Earth’s axial tilt, so this is not an epoch-specific polar-circle calculation. The WGS 84 parallel length is a model-derived reference, not a ground-route measurement. The displayed line and basemap are for geographic reference, not surveying or legal boundary work.
Inspect the Arctic Circle near Alaska
A learner wants an approximate map coordinate around northern Alaska.
Input Parameters
- Reference latitude
- 66.5636° N (approximate)
- Longitude
- 150° W (regional shortcut)
Computed Outputs
- Map-reference coordinate
- 66.563600° N, 150.000000° W
Step-by-Step Mathematical Process
- Select Alaska from the map shortcuts.
- Read the point’s coordinate next to the map.
Understand the WGS 84 parallel length
A student compares the Arctic Circle with the Equator.
Input Parameters
- Reference latitude
- 66.5636° N
- WGS 84 method
- C = 2πN cos φ
Computed Outputs
- Parallel circumference
- approximately 15,984 km along the WGS 84 reference parallel (rounded)
Step-by-Step Mathematical Process
- Calculate the WGS 84 prime-vertical radius N at latitude φ.
- Multiply the radius of the constant-latitude parallel by 2π.
Compare the solstice daylight limits
A teacher explains why the Arctic Circle is tied to both solstices.
Input Parameters
- June solstice
- Northern summer; midnight-sun limit
- December solstice
- Northern winter; polar-night limit
Computed Outputs
- Geographic idea
- The circle is approximately 90° minus Earth’s axial tilt from the North Pole.
Step-by-Step Mathematical Process
- Use a reliable almanac for the year’s solstice dates.
- Explain the idealized solar-horizon condition at the approximate circle.
Understanding Your Results & Practical Interpretation
A changing astronomical latitude
The 66.5636° N line is a convenient fixed map reference. The astronomical Arctic Circle is set by axial tilt and changes gradually, so published coordinates can differ by epoch and rounding.
Midnight sun and polar night
At and north of the idealized circle, the June solstice can bring a day when the Sun does not set, and the December solstice a day when it does not rise. The number of continuous-light and continuous-dark days increases farther toward the pole.
Arctic states and geographic counting
A commonly cited group of eight Arctic states is Canada, the Kingdom of Denmark through Greenland, Finland, Iceland, Norway, Russia, Sweden, and the United States (Alaska). This describes states with Arctic territory, not a promise that every generalized coastline dataset intersects the same fixed line at every epoch. Iceland is often included through Grímsey in traditional crossing lists.
Practical Applications & Real-World Use Cases
Study the Arctic Circle latitude
See where about 66.5° north lies relative to the Equator, the Arctic Ocean, and northern land areas.
Explain the midnight sun and polar night
Connect Earth’s axial tilt and the solstices to the idealized polar daylight limits.
Inspect a high-latitude coordinate
Select a longitude and copy a general point along the approximate Arctic Circle reference.
Mathematical Methodology & Geodetic Accuracy
Approximate Arctic Circle Latitude and WGS 84 Parallel Length
The map uses 66.5636° N as a static cartographic reference (approximately 66°33′49″ N). The astronomical Arctic Circle is defined by Earth’s axial tilt and shifts over time. The shown parallel length is calculated on the WGS 84 reference ellipsoid.
φref = 66.5636° N; N = a / √(1 − e² sin²φ); C = 2πN cosφLimitations & Boundary Conditions
- •The circle’s astronomical latitude follows changes in Earth’s axial tilt; this map does not update it by date or epoch.
- •Sunrise, sunset, refraction, terrain, and local horizon conditions affect observed polar-day and polar-night boundaries.
- •Country and island crossing lists vary with boundary datasets, sovereignty conventions, map scale, and the circle’s changing latitude.
- •The parallel circumference is a model-derived ellipsoid length, not a route distance or Arctic-region area.
- •Map tiles require an internet connection and are supplied by OpenStreetMap contributors.
Authoritative Reference Standards
Troubleshooting & Geographic Edge Cases
Why do sources list slightly different Arctic Circle latitudes?
Some use rounded values such as 66.5° or 66°33′, while others give a more precise value for a stated date or epoch. Earth’s axial tilt changes gradually, so the astronomical circle is not fixed.
Why is a place north of the Arctic Circle not always dark or light for exactly 24 hours?
The idealized latitude definition simplifies the Sun’s apparent disk and horizon. Atmospheric refraction, elevation, surrounding terrain, and sunrise/sunset conventions can alter local observations.
Why do country lists sometimes include Iceland?
Traditional lists include Iceland through Grímsey, a small island near the circle. Because both the astronomical line and generalized coastline data vary, a map’s exact island intersection depends on its epoch and boundary dataset.
Frequently Asked Questions
The Arctic Circle is the approximate parallel around 66.56° north latitude. It passes through northern parts of North America, Greenland, Scandinavia, and Russia, as well as the Arctic Ocean. This page shows a fixed reference line on an interactive map.