Scores are estimated from moon phase, moonlight interference and dark-window timing for Honolulu. This first version does not include cloud cover, so always check weather.
🌌 Aug is a good window for the Milky Way core over Honolulu: it climbs to a shootable altitude around 20:20, sinks back down near 01:00, and peaks around 20:40 at roughly 40° in the South. Avoid moonlight and face that direction to catch the bright galactic center.
That is where the core sits in the sky over Honolulu — not a promise you can see it. Under city lights it is essentially invisible, and our dark-sky catalogue currently lists no qualifying site in the region around Honolulu.
| Date | Score | Tonight's Moon | Dark window |
|---|---|---|---|
| 2026-08-08 | 92 · Good | Waning Crescent 20% | 20:26-04:47 |
| 2026-08-09 | 92 · Good | Waning Crescent 11% | 20:25-04:48 |
| 2026-08-10 | 92 · Good | Waning Crescent 5% | 20:24-04:48 |
| 2026-08-11 | 92 · Good | Waning Crescent 1% | 20:23-04:49 |
| 2026-08-12 | 92 · Good | New Moon 0% | 20:23-04:49 |
| Date | Score | Tonight's Moon | Moonrise | Moonset | Dark window |
|---|---|---|---|---|---|
| 2026-08-01 | 40 · Poor | Waning Gibbous 89% | 21:20 | 08:49 | 20:31-04:43 |
| 2026-08-02 | 52 · Fair | Waning Gibbous 82% | 21:53 | 09:42 | 20:30-04:44 |
| 2026-08-03 | 52 · Fair | Waning Gibbous 73% | 22:28 | 10:37 | 20:30-04:45 |
| 2026-08-04 | 74 · Fair | Waning Gibbous 63% | 23:07 | 11:34 | 20:29-04:45 |
| 2026-08-05 | 74 · Fair | Last Quarter 52% | 23:51 | 12:35 | 20:28-04:46 |
| 2026-08-06 | 74 · Fair | Waning Crescent 41% | -- | 13:39 | 20:27-04:46 |
| 2026-08-07 | 84 · Good | Waning Crescent 30% | 00:42 | 14:46 | 20:27-04:47 |
| 2026-08-08 | 92 · Good | Waning Crescent 20% | 01:41 | 15:52 | 20:26-04:47 |
| 2026-08-09 | 92 · Good | Waning Crescent 11% | 02:46 | 16:54 | 20:25-04:48 |
| 2026-08-10 | 92 · Good | Waning Crescent 5% | 03:54 | 17:50 | 20:24-04:48 |
| 2026-08-11 | 92 · Good | Waning Crescent 1% | 05:03 | 18:39 | 20:23-04:49 |
| 2026-08-12 | 92 · Good | New Moon 0% | 06:09 | 19:21 | 20:23-04:49 |
| 2026-08-13 | 92 · Good | Waxing Crescent 2% | 07:11 | 20:00 | 20:22-04:50 |
| 2026-08-14 | 92 · Good | Waxing Crescent 6% | 08:10 | 20:35 | 20:21-04:51 |
| 2026-08-15 | 92 · Good | Waxing Crescent 12% | 09:06 | 21:10 | 20:20-04:51 |
| 2026-08-16 | 84 · Good | Waxing Crescent 20% | 10:00 | 21:45 | 20:19-04:52 |
| 2026-08-17 | 84 · Good | Waxing Crescent 29% | 10:55 | 22:21 | 20:18-04:52 |
| 2026-08-18 | 84 · Good | Waxing Crescent 38% | 11:49 | 22:59 | 20:17-04:52 |
| 2026-08-19 | 64 · Fair | First Quarter 48% | 12:44 | 23:41 | 20:16-04:53 |
| 2026-08-20 | 74 · Fair | Waxing Gibbous 58% | 13:39 | -- | 20:15-04:53 |
| 2026-08-21 | 62 · Fair | Waxing Gibbous 67% | 14:32 | 00:27 | 20:14-04:54 |
| 2026-08-22 | 52 · Fair | Waxing Gibbous 75% | 15:24 | 01:17 | 20:13-04:54 |
| 2026-08-23 | 52 · Fair | Waxing Gibbous 83% | 16:11 | 02:10 | 20:12-04:55 |
| 2026-08-24 | 40 · Poor | Waxing Gibbous 90% | 16:55 | 03:05 | 20:12-04:55 |
| 2026-08-25 | 40 · Poor | Waxing Gibbous 95% | 17:36 | 04:00 | 20:11-04:56 |
| 2026-08-26 | 40 · Poor | Waxing Gibbous 98% | 18:13 | 04:55 | 20:10-04:56 |
| 2026-08-27 | 40 · Poor | Full Moon 100% | 18:47 | 05:49 | 20:09-04:57 |
| 2026-08-28 | 40 · Poor | Waning Gibbous 99% | 19:21 | 06:43 | 20:08-04:57 |
| 2026-08-29 | 40 · Poor | Waning Gibbous 97% | 19:55 | 07:37 | 20:06-04:57 |
| 2026-08-30 | 40 · Poor | Waning Gibbous 92% | 20:30 | 08:32 | 20:05-04:58 |
| 2026-08-31 | 52 · Fair | Waning Gibbous 85% | 21:08 | 09:29 | 20:04-04:58 |
The Honolulu calendar combines Moon phase, dark windows, and short-range conditions, but the score still needs local context and light pollution checks.
Score
High scores mean friendlier moonlight and night windows, and short-range views can include cloud and transparency. Local fog, patchy cloud, and nearby lights can still change the outcome.
Moonlight
Full-moon periods light the landscape but reduce faint-star and Milky Way contrast. For the Milky Way, meteors, or deep-sky targets, new-moon periods are usually better.
Dark window
Dark outside is not always dark enough. The dark window considers twilight ending, Moon rise and set, and the length of usable night.
After choosing a good date, confirm location, direction, and hourly weather for the night.
Short range
Moon phase can be planned months ahead, but cloud needs a short-range forecast. For the actual night, use hourly stargazing index and on-site observation.
Place
High elevation may help with low cloud, but nearby lights can still wash out the sky. Use the dark-sky map to remove weak candidates first.
Direction
A site may only work for certain horizons. Use the sky map to check the galactic center, Moon, and constellations before facing sea, mountains, or city lights.
Related tools: Stargazing & Moon Viewing Score · This month’s Moon phase calendar · Astronomy Calendar · Meteor Showers