Unmanned reef lights of the Florida Keys is a lighthouse in Monroe County, Florida. It sits roughly 10.1 km (6.3 mi) SE of Key Largo.
The unmanned reef lights of the Florida Keys were navigational aids erected near the Florida Keys between 1921 and 1935.From the Wikipedia article “Unmanned reef lights of the Florida Keys”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Unmanned reef lights of the Florida Keys the sunrise point swings a long way through the year: about 64° (ENE) at the June solstice and 116° (ESE) in late December. Sunset moves from 297° (WNW) in June to 244° (WSW) in December, and the midday sun climbs to 88° in summer but only 42° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:26 AM | 90° E | 7:33 PM | 270° W | 65° | 12h 07m |
| June solstice (Jun 21) | 6:33 AM | 64° ENE | 8:15 PM | 297° WNW | 88° | 13h 42m |
| September equinox (Sep 22) | 7:11 AM | 89° E | 7:19 PM | 271° W | 65° | 12h 08m |
| December solstice (Dec 21) | 7:03 AM | 116° ESE | 5:38 PM | 244° WSW | 42° | 10h 35m |
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 | 6:44 AM | 7:09 AM | 7:42 AM | 5:21 PM | 5:54 PM | 6:19 PM | 10h 45m |
| February | 6:34 AM | 6:57 AM | 7:28 AM | 5:45 PM | 6:16 PM | 6:40 PM | 11h 19m |
| March | 7:09 AM | 7:32 AM | 8:02 AM | 7:01 PM | 7:31 PM | 7:54 PM | 11h 59m |
| April | 6:37 AM | 7:00 AM | 7:31 AM | 7:14 PM | 7:44 PM | 8:08 PM | 12h 44m |
| May | 6:13 AM | 6:38 AM | 7:10 AM | 7:27 PM | 7:59 PM | 8:24 PM | 13h 21m |
| June | 6:07 AM | 6:32 AM | 7:06 AM | 7:40 PM | 8:13 PM | 8:39 PM | 13h 41m |
| July | 6:16 AM | 6:42 AM | 7:14 AM | 7:42 PM | 8:14 PM | 8:40 PM | 13h 33m |
| August | 6:32 AM | 6:56 AM | 7:27 AM | 7:26 PM | 7:58 PM | 8:21 PM | 13h 01m |
| September | 6:45 AM | 7:08 AM | 7:39 AM | 6:57 PM | 7:27 PM | 7:50 PM | 12h 19m |
| October | 6:57 AM | 7:20 AM | 7:51 AM | 6:25 PM | 6:56 PM | 7:19 PM | 11h 35m |
| November | 6:15 AM | 6:39 AM | 7:12 AM | 5:03 PM | 5:35 PM | 5:59 PM | 10h 56m |
| December | 6:35 AM | 7:00 AM | 7:34 AM | 5:01 PM | 5:35 PM | 6:00 PM | 10h 36m |
Local time (America/New York), 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 Unmanned reef lights of the Florida Keys, the Milky Way core is visible in a dark sky from February through October. June gives the longest window (about 7.3 hours on a moonless night), and the core peaks around 36° above the southern horizon. Our light-pollution model puts the sky at about Bortle 4 (rural / suburban transition), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | 4° | — |
| February | 4:24 AM – 5:34 AM | 1.2 | 22° | SE → SE |
| March | 3:37 AM – 6:07 AM | 2.5 | 32° | SE → SSE |
| April | 1:34 AM – 5:34 AM | 4.0 | 36° | SE → S |
| May | 11:35 PM – 5:05 AM | 5.5 | 36° | SE → SSW |
| June | 9:43 PM – 5:03 AM | 7.3 | 36° | SE → SW |
| July | 9:42 PM – 3:32 AM | 5.8 | 36° | SSE → SW |
| August | 9:19 PM – 1:29 AM | 4.2 | 36° | S → SW |
| September | 8:44 PM – 11:34 PM | 2.8 | 33° | SSW → SW |
| October | 8:12 PM – 9:32 PM | 1.3 | 24° | SW → SW |
| November | Below 10° in darkness | — | 7° | — |
| December | Below 10° in darkness | — | -17° | — |
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: 4 Bortle 4 — Rural / suburban transition. Light domes are visible in several directions; the Milky Way is clear but lacks detail near the horizon. Modeled zenith brightness ≈ 21.21 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show November as the clearest month (about 46% average cloud cover) and June as the cloudiest (69%). August is the warmest month and January 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 | 81 | 83 | 86 | 89 | 90 | 91 | 91 | 91 | 90 | 89 | 86 | 82 |
| Low °F | 37 | 43 | 48 | 58 | 67 | 76 | 78 | 79 | 73 | 57 | 53 | 41 |
| Precip. (in) | 1.4 | 1.8 | 1.7 | 2.8 | 4.7 | 8.1 | 7.1 | 7.4 | 8.0 | 4.2 | 2.2 | 1.7 |
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
- 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.
- Stormy weather and crashing surf add drama; keep a safe distance from waves on rocks and piers.
- A telephoto from across a bay compresses the tower against cliffs or the moon.
- Bring a spare battery — cold weather and long exposures drain them fast.
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.
Tides
The nearest NOAA tide prediction station is Rock Harbor, Key Largo, 9.6 km (6.0 mi) away. Low tide often reveals tide pools, wet-sand reflections and sea stacks.
Nearby photo spots
Other locations within 25 km of Unmanned reef lights of the Florida Keys, closest first.
Lighthouse
State Park
State Park
LighthouseFAQ
When is the best time to photograph Unmanned reef lights of the Florida Keys?
What time is golden hour at Unmanned reef lights of the Florida Keys?
Where does the sun rise and set at Unmanned reef lights of the Florida Keys?
Can you see the Milky Way from Unmanned reef lights of the Florida Keys?
Do you need a permit to photograph at Unmanned reef lights of the Florida Keys?
How far is Unmanned reef lights of the Florida Keys from Key Largo?
Sources
Location data: Wikidata, 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.