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 — and sunset is at 06:46 PM.
Days 1–4 Weather SummaryLight rain (total 8mm), mostly falling on Mon morning. Icy conditions (max 11°C on Mon morning, min -1°C on Sat night). Winds decreasing (fresh winds from the SW on Fri night, calm by Sun morning). | Days 5–7 Weather SummaryModerate rain (total 17mm), heaviest on Mon night. Icy conditions (max 16°C on Mon night, min -4°C on Tue night). Winds decreasing (strong winds from the S on Mon night, calm by Wed night). | Days 8–10 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Freeze-thaw conditions (max 10°C on Fri afternoon, min -4°C on Sat morning). Wind will be generally light. | Days 11–13 Weather SummaryMostly dry. Freeze-thaw conditions (max 7°C on Sun afternoon, min -6°C on Tue morning). Winds decreasing (fresh winds from the NW on Tue morning, light winds from the ENE by Wed morning). | ||||||||||||||||||||||||||||||||||||||||||||
Fri 13 | Saturday 14 | 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 | ||||||||||||||||||||||||||||||||
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 | night | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||||||||||
High Tide | 8:12PM2.31m | 8:23AM2.69m | 9:07PM2.42m | 9:17AM2.80m | 9:55PM2.57m | 10:05AM2.92m | 10:38PM2.76m | 10:50AM3.05m | 11:18PM2.94m | 11:33AM3.15m | 11:57PM3.12m | 12:16PM3.22m | 00:36AM3.28m | 1:00PM3.23m | 1:17AM3.38m | 1:45PM3.19m | 2:00AM3.42m | 2:34PM3.09m | 2:47AM3.40m | 3:25PM2.95m | 3:39AM3.31m | 4:22PM2.80m | 4:37AM3.19m | 5:25PM2.66m | 5:41AM3.07m | 6:34PM2.58m | 6:51AM2.99m | 7:45PM2.60m | |||||||||||||||||||
Low Tide | 1:57PM0.51m | 2:06AM0.68m | 2:53PM0.42m | 3:01AM0.56m | 3:42PM0.29m | 3:52AM0.40m | 4:25PM0.14m | 4:39AM0.21m | 5:07PM-0.00m | 5:23AM0.02m | 5:47PM-0.12m | 6:07AM-0.16m | 6:28PM-0.19m | 6:51AM-0.29m | 7:10PM-0.21m | 7:37AM-0.37m | 7:53PM-0.17m | 8:25AM-0.37m | 8:40PM-0.08m | 9:16AM-0.29m | 9:29PM0.05m | 10:11AM-0.17m | 10:25PM0.21m | 11:11AM-0.02m | 11:26PM0.34m | 12:17PM0.09m | 00:33AM0.42m | 1:25PM0.14m | |||||||||||||||||||
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cloudy | some clouds | some clouds | some clouds | clear | some clouds | some clouds | some clouds | mod rain | light rain | heavy rain | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | rain shwrs | clear | some clouds | cloudy | cloudy | cloudy | some clouds | some clouds | some clouds | clear | clear | clear | clear | some clouds | cloudy | light snow | mod snow | light rain | snow shwrs | some clouds | some clouds | some clouds | some clouds | some clouds | light snow | |
km/h | |||||||||||||||||||||||||||||||||||||||||||||||
— | — | — | — | — | — | — | — | 8 | 2 | 15 | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 1 | — | — | — | — | — | — | — | |
max°C | 5 | 7 | 6 | 6 | 2 | 2 | 4 | 5 | 11 | 15 | 16 | 6 | 6 | 2 | -1 | 4 | 3 | 3 | 6 | 3 | 6 | 10 | 5 | -1 | 4 | 2 | 3 | 7 | 6 | 4 | 6 | 1 | -3 | 1 | -2 | -2 | 0 | 0 | 3 | 3 | 1 | 1 | 3 | 1 | 2 | 4 | 1 |
Moonrise | — | — | 4:51 | — | — | 5:22 | — | — | 5:48 | — | — | 6:11 | — | — | 6:33 | — | — | 6:54 | — | — | 7:17 | — | — | 7:43 | — | — | 8:15 | — | — | 8:54 | — | — | 9:45 | — | — | 10:47 | — | — | 11:57 | — | — | 1:13 | — | — | 2:27 | — | — |
Moonset | — | — | 2:00 | — | — | — | 3:10 | — | — | 4:20 | — | — | 5:32 | — | — | 6:44 | — | — | 7:58 | — | — | — | 9:14 | — | — | 10:33 | — | — | 11:53 | — | — | — | 1:10 | — | — | 2:18 | — | — | 3:14 | — | — | 3:58 | — | — | 4:32 | — | — |
 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — |
 | 6:46 | — | — | 6:47 | — | — | 6:50 | — | — | 6:51 | — | — | 6:52 | — | — | 6:52 | — | — | 6:53 | — | — | 6:54 | — | — | 6:55 | — | — | 6:58 | — | — | 6:59 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:02 | — | — | 7:04 | — |
Today's sea temperature in Castle Island, Boston Harbor is 3.5° C (Statistics for 13 Mar 1981-2005 – mean: 3.4 max: 4.7 min: 1.5°C) | |||||||||||||||||||||||||||||||||||||||||||||||
Nearest