Bois Blanc Light is a lighthouse in Mackinac County, Michigan at about 180 m (591 ft) above sea level. The nearest town is Cheboygan, about 18.7 km (11.6 mi) away (Bois Blanc Light lies NNE of town).
Bois Blanc Light can refer to one of five lighthouses erected on Bois Blanc Island, Michigan, in Lake Huron. Two of the lighthouses are currently standing. The lighthouse and surrounding property are privately owned and closed to the public.From the Wikipedia article “Bois Blanc Light”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Bois Blanc Light the sunrise point swings a long way through the year: about 54° (NE) at the June solstice and 124° (SE) in late December. Sunset moves from 306° (NW) in June to 236° (WSW) in December, and the midday sun climbs to 68° in summer but only 21° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:42 AM | 90° E | 7:50 PM | 271° W | 44° | 12h 09m |
| June solstice (Jun 21) | 5:48 AM | 54° NE | 9:32 PM | 306° NW | 68° | 15h 44m |
| September equinox (Sep 22) | 7:25 AM | 89° E | 7:37 PM | 271° W | 44° | 12h 12m |
| December solstice (Dec 21) | 8:17 AM | 124° SE | 4:56 PM | 236° WSW | 21° | 8h 40m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Lighthouses work at both ends of the day: blue hour when the beacon is lit, and golden hour when white towers take on warm tones.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:42 AM | 8:16 AM | 9:03 AM | 4:32 PM | 5:20 PM | 5:53 PM | 9h 04m |
| February | 7:10 AM | 7:41 AM | 8:23 AM | 5:22 PM | 6:04 PM | 6:35 PM | 10h 23m |
| March | 7:22 AM | 7:51 AM | 8:31 AM | 7:04 PM | 7:44 PM | 8:13 PM | 11h 52m |
| April | 6:21 AM | 6:52 AM | 7:32 AM | 7:44 PM | 8:24 PM | 8:55 PM | 13h 32m |
| May | 5:32 AM | 6:07 AM | 6:50 AM | 8:20 PM | 9:03 PM | 9:38 PM | 14h 56m |
| June | 5:10 AM | 5:48 AM | 6:34 AM | 8:44 PM | 9:30 PM | 10:08 PM | 15h 42m |
| July | 5:26 AM | 6:03 AM | 6:48 AM | 8:41 PM | 9:26 PM | 10:02 PM | 15h 23m |
| August | 6:06 AM | 6:38 AM | 7:20 AM | 8:07 PM | 8:48 PM | 9:20 PM | 14h 09m |
| September | 6:47 AM | 7:17 AM | 7:56 AM | 7:12 PM | 7:51 PM | 8:21 PM | 12h 34m |
| October | 7:25 AM | 7:55 AM | 8:35 AM | 6:13 PM | 6:53 PM | 7:23 PM | 10h 59m |
| November | 7:06 AM | 7:38 AM | 8:24 AM | 4:23 PM | 5:08 PM | 5:40 PM | 9h 30m |
| December | 7:39 AM | 8:13 AM | 9:03 AM | 4:05 PM | 4:54 PM | 5:29 PM | 8h 41m |
Local time (America/Detroit), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Bois Blanc Light, the Milky Way core is visible in a dark sky from April through August. June gives the longest window (about 2.8 hours on a moonless night), and the core peaks around 15° above the southern horizon. Our light-pollution model puts the sky at about Bortle 1 (excellent dark-sky site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -4° | — |
| February | Below 10° in darkness | — | 6° | — |
| March | 5:43 AM – 6:03 AM | 0.3 | 12° | SSE → SSE |
| April | 3:44 AM – 4:54 AM | 1.2 | 14° | SSE → SSE |
| May | 1:45 AM – 3:45 AM | 2.0 | 15° | SSE → S |
| June | 12:10 AM – 3:00 AM | 2.8 | 15° | SSE → SSW |
| July | 11:51 PM – 1:51 AM | 2.0 | 15° | S → SSW |
| August | 10:45 PM – 11:45 PM | 1.0 | 14° | SSW → SSW |
| September | 9:33 PM – 9:43 PM | 0.2 | 11° | SSW → SSW |
| October | Below 10° in darkness | — | 6° | — |
| November | Below 10° in darkness | — | -3° | — |
| December | Below 10° in darkness | — | -20° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 1 Bortle 1 — Excellent dark-sky site. The Milky Way casts faint shadows; zodiacal light and airglow are obvious. Modeled zenith brightness ≈ 21.9 mag/arcsec². Aurora needs roughly Kp 4.0+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 61% average cloud cover) and December as the cloudiest (81%). July is the warmest month and February the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 44 | 55 | 75 | 74 | 82 | 85 | 91 | 88 | 86 | 82 | 69 | 58 |
| Low °F | -15 | -18 | -10 | 6 | 27 | 33 | 44 | 46 | 37 | 28 | 13 | -6 |
| Precip. (in) | 1.8 | 1.7 | 1.8 | 3.2 | 3.1 | 3.4 | 2.9 | 3.1 | 3.5 | 4.2 | 2.6 | 2.4 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this lighthouse
- A telephoto from across a bay compresses the tower against cliffs or the moon.
- Many lighthouses are on private or Coast Guard property — check public access and opening hours.
- Moonrise or the Milky Way over the tower makes a classic night composition; plan with the azimuth tables.
- During blue hour, use 5–15 second exposures to capture the beam; check whether the light is still active.
- Shoot from the beach or a jetty to place the tower against open sky and sea.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Summer brings open towers and tours; autumn and winter offer storms, fewer crowds and lower sun angles.
Suggested gear: Tripod, Telephoto lens, ND filter for smooth water, Rain cover. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Bois Blanc Light, closest first.
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Natural Arch
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State ParkSand DunesFAQ
When is the best time to photograph Bois Blanc Light?
What time is golden hour at Bois Blanc Light?
Where does the sun rise and set at Bois Blanc Light?
Can you see the Milky Way from Bois Blanc Light?
Do you need a permit to photograph at Bois Blanc Light?
How far is Bois Blanc Light from Cheboygan?
Sources
Location data: Wikidata, USGS GNIS / GeoNames, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.