Castle Island, Boston Harbor Sea Conditions table showing wave height, swell direction and period.
High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 06:39 AM and sunset is at 05:15 PM.
Days 1–3 Weather SummaryMostly dry. Icy conditions (max 3°C on Tue afternoon, min -3°C on Sun morning). Wind will be generally light. | Days 4–6 Weather SummaryA light covering of new snow, mostly falling on Fri night. Icy conditions (max 3°C on Fri morning, min -1°C on Wed night). Wind will be generally light. | Days 7–9 Weather SummaryA moderate fall of snow, heaviest on Mon night. Freeze-thaw conditions (max 1°C on Sat morning, min -6°C on Mon night). Wind will be generally light. | Days 10–12 Weather SummaryMostly dry. Freeze-thaw conditions (max 5°C on Wed afternoon, min -4°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||||||||||||||||||||||
Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 1 | Mon 2 | ||||||||||||||||||||||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||||||||||
High Tide | 9:39AM2.95m | 10:16PM2.63m | 10:22AM3.05m | 10:54PM2.76m | 11:02AM3.14m | 11:32PM2.90m | 11:42AM3.19m | 00:09AM3.03m | 12:23PM3.20m | 00:47AM3.13m | 1:06PM3.16m | 1:28AM3.20m | 1:51PM3.08m | 2:11AM3.22m | 2:41PM2.94m | 3:00AM3.20m | 3:35PM2.79m | 3:54AM3.14m | 4:36PM2.65m | 4:55AM3.08m | 5:43PM2.55m | 6:01AM3.04m | 6:53PM2.54m | 7:10AM3.05m | 8:02PM2.61m | 8:17AM3.12m | 9:04PM2.74m | 9:17AM3.19m | |||||||||||||||||||
Low Tide | 4:04PM0.12m | 4:08AM0.30m | 4:43PM-0.00m | 4:51AM0.16m | 5:21PM-0.11m | 5:33AM0.03m | 5:59PM-0.18m | 6:15AM-0.07m | 6:39PM-0.20m | 6:59AM-0.15m | 7:19PM-0.18m | 7:45AM-0.17m | 8:03PM-0.11m | 8:34AM-0.15m | 8:50PM0.01m | 9:28AM-0.08m | 9:42PM0.15m | 10:27AM0.01m | 10:41PM0.28m | 11:31AM0.08m | 11:45PM0.36m | 12:39PM0.09m | 00:52AM0.37m | 1:46PM0.04m | 1:58AM0.30m | 2:48PM-0.05m | 2:59AM0.17m | 3:43PM-0.14m | |||||||||||||||||||
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clear | some clouds | cloudy | some clouds | some clouds | some clouds | cloudy | cloudy | clear | some clouds | cloudy | cloudy | some clouds | cloudy | some clouds | cloudy | light snow | light snow | cloudy | cloudy | light snow | cloudy | light snow | snow shwrs | cloudy | cloudy | snow shwrs | some clouds | cloudy | cloudy | cloudy | clear | clear | clear | clear | clear | clear | clear | clear | cloudy | cloudy | cloudy | cloudy | cloudy | some clouds | clear | some clouds | |
km/h | |||||||||||||||||||||||||||||||||||||||||||||||
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max°C | -3 | -3 | -2 | 1 | 1 | 0 | 0 | 3 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | -1 | -1 | 0 | -1 | 4 | 5 | 0 | 0 | 0 | 0 | 10 | 10 | 8 | 14 | 6 | -1 | -1 | -1 | 0 | 7 | 9 |
Moonrise | 5:54 | — | — | 6:22 | — | — | 6:47 | — | — | 7:09 | — | — | 7:30 | — | — | 7:51 | — | — | 8:14 | — | — | 8:41 | — | — | 9:14 | — | — | 9:56 | — | — | 10:49 | — | — | 11:54 | — | — | 1:08 | — | — | 2:25 | — | — | — | 3:41 | — | — | 4:54 |
Moonset | — | 3:20 | — | — | 4:30 | — | — | 5:40 | — | — | 6:51 | — | — | 8:03 | — | — | — | 9:15 | — | — | 10:31 | — | — | 11:48 | — | — | — | 1:06 | — | — | 2:19 | — | — | 3:24 | — | — | 4:16 | — | — | 4:57 | — | — | 5:29 | — | — | 5:55 | — |
 | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — |
 | — | 5:15 | — | — | 5:16 | — | — | 5:19 | — | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:27 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:34 | — | — | 5:35 |
Today's sea temperature in Castle Island, Boston Harbor is 2.3° C (Statistics for 15 Feb 1981-2005 – mean: 3.5 max: 4.7 min: 2.1°C) | |||||||||||||||||||||||||||||||||||||||||||||||
Forecast update inUpdates in hr min sUpdate imminent
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