Mauna Kea stargazing in October 2027
Stargazing at the visitor station (2,800 m). The summit requires 4x4 and acclimatisation.
Fri 1 Oct to Sun 31 Oct 2027
Best night: Fri 1 October 2027
Dark from 19:25 to 05:02 · 9.5 h without the moon · Milky Way core: 2.3 h
| Night of | Moon | Dark hours | Moon-free | Milky Way core | Score |
|---|---|---|---|---|---|
| Fri 1 Oct | 7% | 9.7 | 9.5 | 2.3 h | 100 |
| Sat 2 Oct | 13% | 9.7 | 8.8 | 1.7 h | 99 |
| Sun 3 Oct | 21% | 9.7 | 8.0 | 0.7 h | 97 |
| Mon 4 Oct | 30% | 9.8 | 7.3 | moonlit only | 94 |
| Tue 5 Oct | 39% | 9.8 | 6.3 | moonlit only | 88 |
| Wed 6 Oct | 49% | 9.8 | 5.5 | moonlit only | 82 |
| Thu 7 Oct | 58% | 9.8 | 4.5 | moonlit only | 73 |
| Fri 8 Oct | 68% | 9.8 | 3.7 | moonlit only | 64 |
| Sat 9 Oct | 76% | 9.8 | 2.8 | moonlit only | 54 |
| Sun 10 Oct | 83% | 9.8 | 2.0 | moonlit only | 43 |
| Mon 11 Oct | 90% | 9.8 | 1.2 | moonlit only | 33 |
| Tue 12 Oct | 95% | 9.8 | 0.3 | moonlit only | 22 |
| Wed 13 Oct | 98% | 9.8 | 0.0 | moonlit only | 17 |
| Thu 14 Oct | 100% | 10.0 | 0.0 | moonlit only | 15 |
| Fri 15 Oct | 99% | 10.0 | 0.0 | moonlit only | 16 |
| Sat 16 Oct | 97% | 10.0 | 0.0 | moonlit only | 18 |
| Sun 17 Oct | 92% | 10.0 | 0.3 | moonlit only | 25 |
| Mon 18 Oct | 85% | 10.0 | 1.2 | 1.2 h | 36 |
| Tue 19 Oct | 76% | 10.0 | 2.2 | 1.5 h | 50 |
| Wed 20 Oct | 65% | 10.0 | 3.3 | 1.5 h | 63 |
| Thu 21 Oct | 54% | 10.0 | 4.5 | 1.5 h | 75 |
| Fri 22 Oct | 42% | 10.0 | 5.5 | 1.3 h | 84 |
| Sat 23 Oct | 30% | 10.0 | 6.7 | 1.3 h | 91 |
| Sun 24 Oct | 20% | 10.0 | 7.7 | 1.3 h | 96 |
| Mon 25 Oct | 12% | 10.2 | 8.7 | 1.2 h | 99 |
| Tue 26 Oct | 5% | 10.2 | 9.7 | 1.2 h | 100 |
| Wed 27 Oct | 2% | 10.2 | 10.2 | 1.2 h | 100 |
| Thu 28 Oct | 0% | 10.2 | 10.2 | 1.0 h | 100 |
| Fri 29 Oct | 1% | 10.2 | 10.2 | 1.0 h | 100 |
| Sat 30 Oct | 4% | 10.2 | 10.2 | 1.0 h | 100 |
| Sun 31 Oct | 9% | 10.2 | 9.5 | moonlit only | 99 |
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Questions
What is the best night for stargazing at Mauna Kea in October 2027?
The best nights are Fri 1 Oct, Tue 26 Oct, Wed 27 Oct, Thu 28 Oct, Fri 29 Oct, when the sky is fully dark and the moon is down for most of the night.
Can you see the Milky Way core at Mauna Kea in October?
Yes, on 16 nights the galactic centre is above 10° during moon-free darkness, up to 2.3 hours a night.
Mauna Kea stargazing by month
Weather is not included. Times are local (Pacific/Honolulu).