Castlereagh
Sunrise and sunset in Castlereagh
Today’s sunrise, sunset and twilight in Castlereagh, in local time. At 54.6° N, the day lasts from 7 h 15 min at the winter solstice to 17 h 17 min at the summer solstice.
Today · worked out at
Thursday, October 22: sunrise at 08:05, sunset at 18:09.
Day length 10 h 03 min, 4 min 14 s shorter than yesterday.
Solar noon at 13:07, with the Sun 24° above the horizon.
Times are Castlereagh time (GMT+1).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 06:05 | 20:09 |
| Nautical twilight | 06:47 | 19:27 |
| Civil twilight | 07:28 | 18:46 |
| Sunrise and sunset | 08:05 | 18:09 |
| Golden hour | 08:05–08:57 | 17:17–18:09 |
Each twilight begins at the morning time and ends at the evening one.
The year in Castlereagh
- Longest day: June 21, 17 h 17 min, from sunrise at 04:47 to sunset at 22:03.
- Shortest day: December 21, 7 h 15 min, from sunrise at 08:43 to sunset at 15:59.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 08:29 | 16:40 | 8 h 10 min |
| February 21 | 07:31 | 17:43 | 10 h 12 min |
| March 21 | 06:23 | 18:38 | 12 h 15 min |
| April 21 | 06:07 | 20:38 | 14 h 31 min |
| May 21 | 05:08 | 21:32 | 16 h 24 min |
| June 21 | 04:47 | 22:03 | 17 h 17 min |
| July 21 | 05:16 | 21:42 | 16 h 27 min |
| August 21 | 06:10 | 20:41 | 14 h 31 min |
| September 21 | 07:07 | 19:24 | 12 h 18 min |
| October 21 | 08:03 | 18:11 | 10 h 08 min |
| November 21 | 08:04 | 16:13 | 8 h 08 min |
| December 21 | 08:43 | 15:59 | 7 h 15 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 54.6° N, 5.9° W, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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