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 06:26 AM and sunset is at 04:27 PM.
Days 1–3 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Cool air temperatures (max 17°C on Fri morning, min 3°C on Fri night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Cool air temperatures (max 17°C on Mon morning, min 2°C on Tue night). Wind will be generally light. | Days 7–9 Weather SummaryHeavy rain (total 31mm), heaviest during Thu afternoon. Very mild (max 11°C on Thu night, min 1°C on Sat night). Mainly fresh winds. | Days 10–12 Weather SummarySome drizzle, heaviest during Mon night. Very mild (max 18°C on Mon morning, min 3°C on Sun morning). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Friday 8 | Saturday 9 | Sunday 10 | Monday 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | |||||||||||||||||||||||||
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 | 3:49PM2.88m | 4:39AM2.59m | 4:50PM2.89m | 5:37AM2.71m | 5:53PM2.94m | 6:34AM2.90m | 6:54PM3.01m | 7:29AM3.12m | 7:54PM3.09m | 8:21AM3.33m | 8:51PM3.17m | 9:11AM3.52m | 9:45PM3.21m | 10:00AM3.64m | 10:38PM3.21m | 10:49AM3.69m | 11:30PM3.17m | 11:39AM3.65m | 00:22AM3.08m | 12:29PM3.54m | 1:14AM2.96m | 1:21PM3.38m | 2:08AM2.83m | |||||||||||||
Low Tide | 9:41AM0.60m | 10:23PM0.24m | 10:41AM0.55m | 11:21PM0.20m | 11:44AM0.44m | 00:18AM0.12m | 12:46PM0.25m | 1:14AM0.03m | 1:45PM0.02m | 2:08AM-0.06m | 2:42PM-0.21m | 2:59AM-0.13m | 3:36PM-0.40m | 3:50AM-0.17m | 4:28PM-0.52m | 4:39AM-0.16m | 5:19PM-0.55m | 5:29AM-0.10m | 6:09PM-0.49m | 6:19AM0.01m | 7:01PM-0.37m | 7:10AM0.14m | 7:53PM-0.20m | |||||||||||||
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 |  |  | | | | |  |  | | | | | | | | |  | |  |  |  | | | | | | | |  | | | | | | | |
clear | some clouds | clear | clear | clear | clear | some clouds | cloudy | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | cloudy | heavy rain | heavy rain | light rain | cloudy | clear | clear | clear | clear | some clouds | cloudy | cloudy | some clouds | clear | rain shwrs | cloudy | cloudy | some clouds | |
km/h | ||||||||||||||||||||||||||||||||||||
— | — | — | — | — | — | — | — | 2.0 | — | — | — | — | — | — | — | — | — | — | 14 | 16 | 1.0 | — | — | — | — | — | — | — | — | — | — | 1.0 | — | — | — | |
max°C | 17 | 16 | 9 | 8 | 9 | 4 | 13 | 13 | 13 | 17 | 15 | 11 | 16 | 12 | 6 | 7 | 6 | 8 | 9 | 10 | 11 | 7 | 6 | 4 | 7 | 5 | 2 | 7 | 7 | 9 | 18 | 18 | 18 | 11 | 9 | 5 |
Moonrise | 12:53 | — | — | 1:21 | — | — | 1:46 | — | — | 2:09 | — | — | 2:32 | — | — | 2:55 | — | — | — | 3:23 | — | — | 3:56 | — | — | 4:37 | — | — | 5:30 | — | — | 6:32 | — | — | 7:41 | — |
Moonset | — | — | 10:29 | — | — | 11:45 | — | — | — | 1:00 | — | — | 2:17 | — | — | 3:35 | — | — | 4:55 | — | — | 6:18 | — | — | 7:41 | — | — | 8:58 | — | — | 10:05 | — | — | 10:58 | — | — |
 | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — |
 | — | 4:27 | — | — | 4:25 | — | — | 4:24 | — | — | 4:23 | — | — | 4:22 | — | — | 4:22 | — | — | 4:22 | — | — | 4:21 | — | — | 4:20 | — | — | 4:19 | — | — | 4:17 | — | — | 4:17 | — |
Today's sea temperature in Castle Island, Boston Harbor is 12.7 °C (Statistics for 08 Nov 1981-2005 – mean: 11.3 max: 12.9 min: 10.0°C) | ||||||||||||||||||||||||||||||||||||
Forecast update inUpdates in hr min sUpdate imminent
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