Snorkeling in Hanauma Bay is generally regarded as safe. However, it's best to avoid the bay 9-10 days after a full moon because that's when you are most likely to encounter box jelly fish.
| Day - Date | Sunrise | Sunset | Moon % Full | Tide | ||
|---|---|---|---|---|---|---|
| Sunday - 9/5 | 7:18 am | 7:40 pm | 14.2 | H | 1:31 am | 1 |
| L | 6:59 am | 0 | ||||
| H | 2:05 pm | 2.4 | ||||
| L | 8:56 pm | 0.1 | ||||
| Monday - 9/6 | 7:19 am | 7:39 pm | 6.9 | H | 2:20 am | 1.2 |
| L | 7:56 am | 0 | ||||
| H | 2:45 pm | 2.3 | ||||
| L | 9:25 pm | 0 | ||||
| Tuesday - 9/7 | 7:19 am | 7:38 pm | 2.0 | H | 3:06 am | 1.5 |
| L | 8:52 am | 0 | ||||
| H | 3:24 pm | 2.2 | ||||
| L | 9:54 pm | 0 | ||||
| Wednesday - 9/8 | 7:19 am | 7:37 pm | 0.0 | H | 3:53 am | 1.7 |
| L | 9:47 am | 0.1 | ||||
| H | 4:02 pm | 2 | ||||
| L | 10:23 pm | -0.1 | ||||
| Thursday - 9/9 | 7:19 am | 7:37 pm | 1.2 | H | 4:40 am | 1.9 |
| L | 10:44 am | 0.2 | ||||
| H | 4:39 pm | 1.8 | ||||
| L | 10:54 pm | -0.1 | ||||
| Friday - 9/10 | 7:20 am | 7:36 pm | 5.2 | H | 5:29 am | 2 |
| L | 11:45 am | 0.3 | ||||
| H | 5:17 pm | 1.5 | ||||
| L | 11:26 pm | -0.1 | ||||
| Saturday - 9/11 | 7:20 am | 7:35 pm | 11.8 | H | 6:21 am | 2.1 |
| L | 12:54 pm | 0.5 | ||||
| H | 5:56 pm | 1.2 | ||||
| Sunday - 9/12 | 7:20 am | 7:34 pm | 20.2 | L | 12:00 am | 0 |
| H | 7:18 am | 2.1 | ||||
| L | 2:18 pm | 0.6 | ||||
| H | 6:40 pm | 0.9 | ||||