A compass is convenient, but it is not essential. The sun traces a predictable path across the sky every day, and from that path you can work out north, south, east, and west with nothing more than a stick, a stone, and a little patience — or even just your wristwatch. This guide covers the two classic methods, the science behind them, and the times of day and year when the sun will quietly send you the wrong way.
In short: Push a stick upright into level ground and mark the shadow tip. Wait fifteen to twenty minutes and mark the new tip. The line between the two marks points roughly east–west: the first mark is west, the second is east. A line at right angles to it gives you north and south.
How the sun gives you directions
Everything rests on one fact: in the northern hemisphere, the sun rises in the general direction of east, climbs to its highest point in the south around midday, and sets toward the west. In the southern hemisphere the pattern is mirrored — it still rises east and sets west, but it arcs across the northern sky, so the midday sun sits due north.
That single difference is why the same method needs a small adjustment depending on which hemisphere you are in. It is also why “sunrise is due east” is only approximately true, a point we will come back to.
Method 1: The shadow-stick method
This is the most reliable solar method and it needs almost no equipment. It works because a shadow moves from west to east across the ground as the sun moves east to west overhead.
- Find level, open ground. You need a spot where the shadow will fall on a flat surface and not in dappled tree shade.
- Plant a stick upright. A metre-long straight stick, a trekking pole, or a tent peg will do. Push it into the ground so it stands vertically.
- Mark the tip of the shadow. Place a small stone or make a scratch exactly where the end of the shadow falls. This is your western point.
- Wait fifteen to twenty minutes. Longer gives a more accurate result. Have a drink; the sun will do the work.
- Mark the new shadow tip. The shadow has swung round; mark where it now ends. This is your eastern point.
- Draw the line. The line joining the two marks runs approximately east–west. Stand with your first mark (west) on your left and the second (east) on your right, and you are facing north.
A line drawn perpendicular to that east–west line is your north–south axis. The shadow-stick method has one big advantage: because it relies only on the geometry of sunlight, it finds true east and west, not magnetic ones. That makes it a useful cross-check for a compass that has not had its declination corrected.
Tidying up the midpoint method
For a more precise north, instead of two marks, take a series of marks across a couple of hours and connect them into a smooth curve. The closest point on that curve to the base of the stick — the shortest shadow — points north (in the northern hemisphere) because it corresponds to local noon.
Method 2: The watch-face method
If you are wearing an analogue watch, you can get a rough bearing in seconds. You need a traditional watch with hands, not a digital display (though you can sketch a dial on paper and treat it as a watch).
In the northern hemisphere:
- Hold the watch flat.
- Point the hour hand at the sun.
- The angle halfway between the hour hand and the 12 o’clock mark is due south.
In the southern hemisphere:
- Hold the watch flat.
- Point the 12 o’clock mark at the sun.
- The angle halfway between 12 and the hour hand now points due north.
Once you have south (or north), the rest of the points fall into place: east is 90° clockwise from north, west is 90° anticlockwise.
The watch method is quick but coarse, and it has two catches. It assumes your watch reads local time rather than daylight-saving time, and it is much less accurate near the equator. Treat it as a first guess, not a survey.
The midday rule: the shortest shadow points north
There is an even simpler trick if you catch the sun near its peak. In the northern hemisphere, the sun is due south at local noon, which means the shortest shadow of the day points north. In the southern hemisphere it points south instead.
Timing is the whole difficulty. “Noon” here means local solar noon, not the time on your phone. Three things push clock noon away from solar noon:
- Longitude — if you are at the western edge of your time zone, solar noon can arrive half an hour or more after clock noon.
- The equation of time — a wobble of up to about sixteen minutes caused by Earth’s elliptical orbit and axial tilt.
- Daylight saving — a flat one-hour shift for part of the year.
Add those together and the sun’s peak can be well over an hour from the hour you would expect, so do not simply take a reading at 12:00 and assume it is due south.
When the sun will mislead you
The sun is a fine tool, but it has a few well-known failure modes. Knowing them keeps you from trusting a bad reading.
- “Sunrise is east” is only exact at the equinoxes. Through the year the rising and setting points drift up to about 23.5° north or south of due east and west. In a northern summer the sun rises noticeably north of east; in winter, south of east. Use sunrise and sunset for a rough bearing only, never for precision.
- Near the equator the midday method breaks down. For much of the year the sun passes almost directly overhead at noon, so the shadow nearly vanishes and the watch method loses its geometry. The east–west shadow-stick method still works well there.
- High latitudes behave strangely. Inside the Arctic and Antarctic Circles the sun can stay up all night in summer or never rise in winter, so no solar method will give you a sensible answer.
- Cloud and haze. On an overcast day you cannot see the sun directly, though its warmth and the brightest part of the sky still hint at its position.
- Buildings and mountains can block the sun at exactly the time you need, so pick an open viewpoint.
Getting an exact reading with an online tool
If you have a phone, you can skip the guesswork entirely. The sun position tool computes the sun’s exact azimuth — its compass direction — for your coordinates and the current time. Face the direction it reports and you are facing the sun precisely, declination and all.
You can also work backwards. Once you know the sun’s azimuth, you know that the opposite direction is its shadow, and a right angle to that lines up with east and west. The sun & moon tool plots both bodies on a live dial, and the bearing calculator gives the exact direction and distance between any two points you care about.
Better still, pair the sun with a magnetometer compass. Read your heading on the online compass, then glance at the sun’s reported azimuth. If the two agree, your compass is calibrated and correctly set to true north. If they disagree, one of them needs attention — and the guide to finding which way you are facing walks through the fix.
Combining sun and shadow for confidence
The strongest answer comes from using both at once. Stand in sunlight, note the direction of your shadow, and check it against a known fact: at local noon your shadow points north in the northern hemisphere and south in the southern hemisphere. Then confirm the whole picture with the compass or the sun tool. When the shadow, the needle, and the calculated azimuth all tell the same story, you can be confident you have it right.
Frequently asked
Can I really find north with just a stick? Yes. Mark a shadow tip, wait, mark it again, and the line between the marks is your east–west axis. North is a right angle from that line away from the sun’s midday side.
Why is the first shadow mark west and not east? Because the sun travels west to east across the sky as seen from the ground, so the shadow sweeps east, from the first mark toward the second.
Does the shadow-stick method give true north or magnetic north? True north. It depends only on the sun’s geometry, not on Earth’s magnetic field, so it is unaffected by declination.
Which way does the sun rise? Broadly east, but the precise point shifts north or south through the year and is only exactly east at the equinoxes.
What if it is cloudy? You cannot use the sun directly, but the brightest patch of sky usually marks the sun’s position, and you can fall back on the online compass instead.
Find the sun, find your way
Next time you are outdoors without a compass, plant a stick, mark two shadows, and read the direction straight from the ground beneath you. It is an old trick, but a dependable one — and with the sun position tool in your pocket, you can put an exact number on it whenever your phone is available. Explore the rest of the toolkit to lock in a heading you can trust.