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 05:20 AM and sunset is at 08:00 PM.
Days 1–3 Weather SummarySome drizzle, heaviest during Mon night. Very warm air temperatures (max 35°C on Tue afternoon, min 14°C on Sun night). Wind will be generally light. | Days 4–6 Weather SummaryHeavy rain (total 25mm), heaviest during Wed afternoon. Very warm air temperatures (max 33°C on Wed afternoon, min 7°C on Fri night). Wind will be generally light. | Days 7–9 Weather SummaryMostly dry. Very mild (max 19°C on Mon morning, min 9°C on Sat morning). Wind will be generally light. | Days 10–12 Weather SummaryLight rain (total 9mm), mostly falling on Tue morning. Warm (max 31°C on Thu afternoon, min 12°C on Wed night). Wind will be generally light. | Days 13–16 Weather SummaryModerate rain (total 10mm), heaviest on Sat night. Warm (max 30°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light. | |||||||||||||||||||||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | Wednesday 27 | Thursday 28 | Friday 29 | Saturday 30 | Sunday 31 | Mon 1 | ||||||||||||||||||||||||||||||||
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 | 12:17PM3.13m | 00:27AM3.66m | 1:10PM3.11m | 1:19AM3.65m | 2:05PM3.07m | 2:14AM3.56m | 3:01PM3.00m | 3:11AM3.42m | 4:00PM2.93m | 4:12AM3.26m | 5:01PM2.88m | 5:15AM3.08m | 6:03PM2.87m | 6:20AM2.94m | 7:03PM2.89m | 7:25AM2.83m | 8:00PM2.93m | 8:26AM2.76m | 8:53PM2.97m | 9:23AM2.72m | 9:40PM3.01m | 10:14AM2.71m | 10:23PM3.04m | 10:59AM2.69m | 11:04PM3.06m | 11:42AM2.69m | 11:42PM3.07m | 12:22PM2.68m | |||||||||||||||||||
Low Tide | 6:08AM-0.48m | 6:18PM-0.08m | 6:59AM-0.52m | 7:10PM-0.05m | 7:52AM-0.48m | 8:03PM0.01m | 8:46AM-0.39m | 8:59PM0.10m | 9:42AM-0.25m | 9:58PM0.20m | 10:40AM-0.09m | 11:00PM0.30m | 11:40AM0.05m | 00:05AM0.35m | 12:40PM0.16m | 1:10AM0.36m | 1:38PM0.25m | 2:14AM0.31m | 2:32PM0.32m | 3:12AM0.25m | 3:22PM0.36m | 4:03AM0.19m | 4:08PM0.40m | 4:48AM0.13m | 4:50PM0.42m | 5:30AM0.10m | 5:31PM0.44m | 6:10AM0.09m | 6:11PM0.45m | ||||||||||||||||||
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clear | clear | some clouds | clear | clear | rain shwrs | clear | clear | clear | clear | rain shwrs | some clouds | some clouds | some clouds | clear | some clouds | light rain | heavy rain | cloudy | cloudy | cloudy | cloudy | some clouds | clear | some clouds | some clouds | some clouds | light rain | rain shwrs | rain shwrs | some clouds | some clouds | clear | clear | some clouds | some clouds | some clouds | some clouds | cloudy | clear | clear | rain shwrs | light rain | risk tstorm | some clouds | clear | clear | |
km/h | |||||||||||||||||||||||||||||||||||||||||||||||
— | — | — | — | — | 1 | — | — | — | — | 6 | — | — | — | — | — | 1 | 18 | — | — | — | — | — | — | — | — | — | 5 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 1 | — | — | — | |
max °C | 25 | 28 | 25 | 16 | 20 | 19 | 29 | 35 | 28 | 30 | 33 | 21 | 13 | 17 | 16 | 13 | 15 | 9 | 12 | 16 | 12 | 10 | 13 | 14 | 19 | 19 | 16 | 14 | 22 | 20 | 15 | 17 | 14 | 23 | 31 | 28 | 17 | 15 | 13 | 22 | 27 | 21 | 20 | 30 | 25 | 23 | 25 |
Moonrise | 5:25 | — | — | 6:21 | — | — | 7:30 | — | — | 8:47 | — | — | 10:05 | — | — | 11:21 | — | — | 12:32 | — | — | 1:40 | — | — | 2:46 | — | — | — | 3:51 | — | — | 4:55 | — | — | 6:00 | — | — | 7:04 | — | — | 8:07 | — | — | — | 9:06 | — | — |
Moonset | — | — | 9:44 | — | — | 10:54 | — | — | 11:50 | — | — | — | 12:32 | — | — | 1:05 | — | — | 1:31 | — | — | 1:53 | — | — | 2:13 | — | — | 2:32 | — | — | 2:52 | — | — | 3:15 | — | — | 3:40 | — | — | 4:11 | — | — | 4:48 | — | — | 5:33 | — |
 | 5:20 | — | — | 5:20 | — | — | 5:18 | — | — | 5:18 | — | — | 5:16 | — | — | 5:16 | — | — | 5:15 | — | — | 5:15 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:09 | — | — | 5:09 | — |
 | — | 8:00 | — | — | 8:00 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:05 | — | — | 8:06 | — | — | 8:07 | — | — | 8:07 | — | — | 8:07 | — | — | 8:08 | — | — | 8:09 | — | — | 8:10 | — | — | 8:12 | — | — | 8:13 | — | — | 8:13 |
Today's sea temperature in Castle Island, Boston Harbor is 11.0° C (Statistics for 17 May 1981-2005 – mean: 9.7 max: 11.8 min: 8.1°C) | |||||||||||||||||||||||||||||||||||||||||||||||
Nearest