Saint Thomas Island · U.S. Virgin Islands · 18.34° N · 64.93° W
Solar position in Charlotte Amalie
Sun position, daylight and the best solar panel angle for Charlotte Amalie — computed for 18.34° N, 64.93° W, 6 m above sea level.
The sun right now
Sun in Charlotte Amalie today
Saturday, 24 October 2026 · local time UTC−4
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:02 | sun 18° below horizon |
| Nautical dawn | 05:28 | 12° below |
| Civil dawn | 05:54 | 6° below |
| Sunrise | 06:16 | 102° ESE |
| Golden hour ends | 06:45 | sun 6° up |
| Solar noon | 12:03 | 59.8° high |
| Golden hour starts | 17:21 | sun 6° up |
| Sunset | 17:51 | 258° WSW |
| Civil dusk | 18:13 | 6° below |
| Nautical dusk | 18:39 | 12° below |
| Astronomical dusk | 19:04 | 18° below |
| Day length | 11 h 35 min | |
Sun path diagram for Charlotte Amalie
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 84.9° at solar noon in Charlotte Amalie; on the December solstice only 48.2°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 50° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:54 | 12:31 | 18:07 | 11 h 13 min | 51.9° |
| February | 06:43 | 12:33 | 18:22 | 11 h 39 min | 61.3° |
| March | 06:22 | 12:26 | 18:30 | 12 h 08 min | 72.1° |
| April | 05:58 | 12:18 | 18:38 | 12 h 39 min | 83.7° |
| May | 05:44 | 12:16 | 18:48 | 13 h 04 min | 88.1° |
| June | 05:44 | 12:21 | 18:58 | 13 h 14 min | 84.9° |
| July | 05:54 | 12:26 | 18:58 | 13 h 04 min | 88.0° |
| August | 06:03 | 12:22 | 18:42 | 12 h 39 min | 83.6° |
| September | 06:08 | 12:12 | 18:16 | 12 h 08 min | 72.2° |
| October | 06:15 | 12:04 | 17:53 | 11 h 38 min | 60.8° |
| November | 06:29 | 12:05 | 17:41 | 11 h 12 min | 51.7° |
| December | 06:46 | 12:17 | 17:48 | 11 h 02 min | 48.2° |
A year of daylight in Charlotte Amalie
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Charlotte Amalie
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
18°collects the most energy over a year: 1705 kWh per kWp.
23°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | November kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1636 | 96% | 3.57 | 1.5× |
| 15° | 1703 | 100% | 4.13 | 1.3× |
| 18° year-round best = latitude | 1705 | 100% | 4.22 | 1.2× |
| 23° off-grid best | 1699 | 100% | 4.34 | 1.2× |
| 30° | 1672 | 98% | 4.45 | 1.3× |
| 45° | 1545 | 91% | 4.51 | 1.6× |
| 60° | 1333 | 78% | 4.29 | 2.0× |
| 70° | 1152 | 68% | 4.01 | 2.6× |
| 90° | 778 | 46% | 3.12 | 3.3× |
A fixed array in Charlotte Amalie produces the most over a year at 18°. The design month for an off-grid system is November: at 23° it makes 4.34 kWh per kWp a day, 3% more than at 18°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Charlotte Amalie at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 18° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 18° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.71 | 5.52 | 4.51 | 4.51 | 25.9 °C |
| February | 5.51 | 5.28 | 4.33 | 4.99 | 25.6 °C |
| March | 6.16 | 4.46 | 3.64 | 5.20 | 25.6 °C |
| April | 6.53 | 3.28 | 2.66 | 5.11 | 26.3 °C |
| May | 6.28 | 2.47 | 1.97 | 4.66 | 27.1 °C |
| June | 6.29 | 2.21 | 1.75 | 4.55 | 27.9 °C |
| July | 6.34 | 2.32 | 1.84 | 4.62 | 28.2 °C |
| August | 6.28 | 2.87 | 2.30 | 4.77 | 28.5 °C |
| September | 5.89 | 3.75 | 3.02 | 4.75 | 28.6 °C |
| October | 5.18 | 4.42 | 3.57 | 4.47 | 28.4 °C |
| November | 4.55 | 4.93 | 4.01 | 4.22 | 27.6 °C |
| December | 4.37 | 5.36 | 4.37 | 4.23 | 26.7 °C |
| Year | 5.67 avg | 3.90 avg | 1152 kWh | 1705 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 680 Wp of panels at 70°, versus 280 Wp at 18°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Charlotte Amalie
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
2.6 mrow pitch at 70°
2.5 mrow pitch at 18°
Solar forecast for Charlotte Amalie, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
Loading the latest forecast…
Questions about the sun in Charlotte Amalie
What is the best solar panel angle in Charlotte Amalie?
What time is sunrise and sunset in Charlotte Amalie today?
How many peak sun hours does Charlotte Amalie get?
How high does the sun get in Charlotte Amalie?
Places near Charlotte Amalie
Put this on your site
A free, live card for Charlotte Amalie: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.