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 07:00 PM.
Days 1–4 Weather SummaryHeavy rain (total 27mm), heaviest during Mon afternoon. Icy conditions (max 8°C on Tue afternoon, min 0°C on Wed night). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Icy conditions (max 9°C on Fri afternoon, min -3°C on Sat morning). Wind will be generally light. | Days 8–10 Weather SummaryA light covering of new snow, mostly falling on Sun afternoon. Becoming milder with light rain (total 3mm) on Mon morning. Freeze-thaw conditions (max 13°C on Mon afternoon, min -3°C on Tue night). Wind will be generally light. | Days 11–13 Weather SummaryA light covering of new snow, mostly falling on Thu afternoon. Becoming milder with light rain (total 6mm) on Thu night. Mild temperatures (max 7°C on Wed afternoon, min 1°C on Thu morning). Winds increasing (calm on Wed night, fresh winds from the N by Fri night). | |||||||||||||||||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Sat 5 | ||||||||||||||||||||||||
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 | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
High Tide | 8:08PM2.44m | 8:20AM2.86m | 9:03PM2.62m | 9:16AM3.01m | 9:53PM2.85m | 10:10AM3.18m | 10:40PM3.10m | 11:01AM3.32m | 11:26PM3.33m | 11:50AM3.40m | 00:12AM3.51m | 12:40PM3.42m | 00:58AM3.61m | 1:30PM3.36m | 1:45AM3.63m | 2:21PM3.23m | 2:35AM3.55m | 3:15PM3.05m | 3:29AM3.40m | 4:13PM2.85m | 4:27AM3.22m | 5:16PM2.68m | 5:31AM3.03m | |||||||||||||
Low Tide | 1:54PM0.36m | 2:07AM0.55m | 2:50PM0.22m | 3:05AM0.35m | 3:42PM0.04m | 3:59AM0.11m | 4:30PM-0.14m | 4:50AM-0.14m | 5:17PM-0.28m | 5:40AM-0.36m | 6:03PM-0.36m | 6:30AM-0.52m | 6:49PM-0.37m | 7:19AM-0.59m | 7:36PM-0.31m | 8:10AM-0.55m | 8:25PM-0.18m | 9:03AM-0.43m | 9:17PM-0.00m | 9:59AM-0.24m | 10:12PM0.20m | 10:59AM-0.03m | 11:13PM0.38m | |||||||||||||
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 |  |  | |  |  |  | | | |  | | | | | | | |  |  |  | | | | | | | | |  | | | | | | | |
heavy rain | rain shwrs | some clouds | some clouds | clear | clear | cloudy | clear | clear | some clouds | some clouds | cloudy | cloudy | some clouds | clear | some clouds | some clouds | cloudy | mod snow | light snow | light rain | light rain | rain shwrs | clear | clear | clear | clear | clear | some clouds | light snow | light snow | light snow | cloudy | cloudy | light snow | cloudy | |
km/h | ||||||||||||||||||||||||||||||||||||
21 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1.0 | 1.0 | 1.0 | — | — | — | — | — | — | — | — | 6 | — | — | — | — | |
max°C | 4 | 5 | 7 | 8 | 7 | 6 | 8 | 5 | 3 | 8 | 7 | 6 | 9 | 8 | 0 | 6 | 4 | 1 | -1 | 6 | 12 | 13 | 12 | 3 | 5 | 1 | 0 | 7 | 3 | 2 | 1 | 5 | 4 | 2 | 2 | 2 |
Moonrise | 4:15 | — | 4:50 | — | — | 5:19 | — | — | 5:44 | — | — | 6:08 | — | — | 6:30 | — | — | 6:55 | — | — | 7:23 | — | — | 7:57 | — | — | 8:39 | — | — | 9:33 | — | — | 10:35 | — | — | 11:44 |
Moonset | 1:13 | — | 2:29 | — | — | — | 3:46 | — | — | 5:04 | — | — | 6:23 | — | — | 7:43 | — | — | — | 9:05 | — | — | 10:28 | — | — | 11:50 | — | — | — | 1:06 | — | — | 2:09 | — | — | 3:00 |
 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 |
 | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:02 | — | — | 7:04 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:08 | — | — | 7:09 | — | — | 7:10 | — | — | 7:12 | — | — |
Today's sea temperature in Castle Island, Boston Harbor is 4.8 °C (Statistics for 24 Mar 1981-2005 – mean: 3.9 max: 5.3 min: 2.6°C) | ||||||||||||||||||||||||||||||||||||
Nearest