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 05:45 AM and sunset is at 07:37 PM.
Days 1–3 Weather SummaryMostly dry. Warm air temperatures (max 23°C on Tue afternoon, min 7°C on Sun morning). Winds decreasing (fresh winds from the WNW on Sun afternoon, light winds from the NE by Mon afternoon). | Days 4–6 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm air temperatures (max 23°C on Fri afternoon, min 8°C on Thu night). Wind will be generally light. | Days 7–9 Weather SummaryLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 22°C on Sat morning, min 6°C on Sat night). Wind will be generally light. | Days 10–12 Weather SummaryModerate rain (total 15mm), heaviest on Thu night. Very mild (max 16°C on Thu afternoon, min 6°C on Tue night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | Monday 5 | Tuesday 6 | Wednesday 7 | Thursday 8 | |||||||||||||||||||||||||
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 | 11:28AM10.83ft | 11:44PM11.98ft | 12:20PM10.83ft | 00:33AM12.17ft | 1:12PM10.63ft | 1:23AM12.07ft | 2:05PM10.27ft | 2:15AM11.71ft | 3:00PM9.81ft | 3:10AM11.16ft | 3:58PM9.35ft | 4:09AM10.5ft | 5:00PM8.92ft | 5:12AM9.88ft | 6:04PM8.69ft | 6:17AM9.42ft | 7:07PM8.69ft | 7:23AM9.12ft | 8:07PM8.83ft | 8:25AM8.99ft | 8:58PM9.09ft | 9:19AM8.96ft | 9:44PM9.35ft | |||||||||||||
Low Tide | 5:18AM-1.48ft | 5:35PM-0.79ft | 6:09AM-1.87ft | 6:24PM-0.75ft | 7:01AM-1.97ft | 7:13PM-0.56ft | 7:53AM-1.77ft | 8:04PM-0.16ft | 8:46AM-1.31ft | 8:58PM0.33ft | 9:41AM-0.69ft | 9:54PM0.89ft | 10:40AM-0.03ft | 10:55PM1.38ft | 11:42AM0.52ft | 11:59PM1.71ft | 12:45PM0.92ft | 1:06AM1.77ft | 1:45PM1.12ft | 2:10AM1.64ft | 2:40PM1.21ft | 3:07AM1.38ft | 3:28PM1.25ft | 3:57AM1.05ft | ||||||||||||
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 |  |  |  | |  | | | | | | | | |  | | | | |  | | | | | | | | | |  | | | | | |  | |
some clouds | cloudy | some clouds | clear | clear | clear | clear | some clouds | some clouds | clear | clear | clear | some clouds | some clouds | rain shwrs | cloudy | clear | clear | some clouds | light rain | some clouds | clear | clear | some clouds | clear | some clouds | some clouds | light rain | light rain | light rain | cloudy | some clouds | rain shwrs | some clouds | cloudy | mod rain | |
mph | ||||||||||||||||||||||||||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.08 | — | — | — | — | 0.2 | — | — | — | — | — | — | — | 0.1 | 0.04 | 0.04 | — | — | 0.04 | — | — | 0.3 | |
max°F | 48 | 52 | 52 | 61 | 68 | 63 | 68 | 73 | 64 | 61 | 66 | 59 | 54 | 52 | 48 | 57 | 73 | 70 | 72 | 64 | 57 | 50 | 61 | 57 | 52 | 55 | 52 | 45 | 45 | 45 | 50 | 52 | 48 | 57 | 61 | 54 |
Moonrise | 5:19 | — | — | 5:51 | — | — | 6:30 | — | — | 7:20 | — | — | 8:21 | — | — | 9:30 | — | — | 10:43 | — | — | 11:54 | — | — | 1:02 | — | — | 2:07 | — | — | — | 3:10 | — | — | 4:11 | — |
Moonset | — | 7:56 | — | — | — | 9:21 | — | — | 10:43 | — | — | 11:55 | — | — | — | 12:53 | — | — | 1:37 | — | — | 2:11 | — | — | 2:38 | — | — | 3:00 | — | — | 3:19 | — | — | 3:37 | — | — |
 | 5:45 | — | — | 5:43 | — | — | 5:41 | — | — | 5:41 | — | — | 5:39 | — | — | 5:37 | — | — | 5:37 | — | — | 5:35 | — | — | 5:33 | — | — | 5:33 | — | — | 5:31 | — | — | 5:31 | — | — |
 | — | 7:37 | — | — | 7:38 | — | — | 7:39 | — | — | 7:42 | — | — | 7:43 | — | — | 7:44 | — | — | 7:45 | — | — | 7:45 | — | — | 7:46 | — | — | 7:47 | — | — | 7:49 | — | — | 7:50 | — |
Today's sea temperature in Castle Island, Boston Harbor is 48 °F (Statistics for 27 Apr 1981-2005 – mean: 44 max: 46 min: 42°F) | ||||||||||||||||||||||||||||||||||||
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