Deer Island (south end), 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 04:13 PM.
Days 1–4 Weather SummaryModerate rain (total 16mm), heaviest on Fri morning. Icy conditions (max 15°C on Fri morning, min -2°C on Fri night). Winds decreasing (strong winds from the S on Fri morning, light winds from the SW by Sat afternoon). | Days 5–7 Weather SummaryMostly dry. Icy conditions (max 3°C on Sun afternoon, min -5°C on Sun night). Mainly fresh winds. | Days 8–10 Weather SummaryHeavy rain (total 22mm), heaviest during Thu night. Freeze-thaw conditions (max 6°C on Fri morning, min -1°C on Wed night). Wind will be generally light. | Days 11–13 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 2°C on Sat afternoon, min -3°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tue 30 | ||||||||||||||||||||||||
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 | 10:33PM2.48m | 10:32AM2.91m | 11:13PM2.49m | 11:11AM2.92m | 11:53PM2.50m | 11:51AM2.93m | 00:32AM2.51m | 12:31PM2.92m | 1:11AM2.53m | 1:11PM2.91m | 1:51AM2.56m | 1:53PM2.88m | 2:31AM2.60m | 2:38PM2.84m | 3:15AM2.66m | 3:27PM2.79m | 4:03AM2.74m | 4:21PM2.73m | 4:54AM2.83m | 5:19PM2.69m | 5:47AM2.94m | 6:18PM2.66m | 6:43AM3.06m | |||||||||||||
Low Tide | 4:19PM0.15m | 4:19AM0.45m | 4:58PM0.12m | 4:59AM0.43m | 5:37PM0.09m | 5:38AM0.42m | 6:16PM0.07m | 6:19AM0.41m | 6:55PM0.06m | 7:01AM0.40m | 7:35PM0.06m | 7:43AM0.39m | 8:16PM0.07m | 8:29AM0.37m | 9:00PM0.09m | 9:20AM0.34m | 9:48PM0.11m | 10:15AM0.28m | 10:38PM0.13m | 11:12AM0.20m | 11:31PM0.14m | 12:11PM0.10m | 00:26AM0.14m | |||||||||||||
SSE 3 | SE 4 | SSE 5 | SE 8 | W 4 | ESE 12 | E 11 | S 3 | SW 4 | WNW 4 | NW 4 | NNW 5 | NNW 5 | ENE 8 | S 4 | SW 3 | NE 5 | NW 3 | NNW 4 | ENE 6 | SSW 3 | SSW 3 | E 10 | E 8 | NNE 4 | NE 5 | NNW 3 | NNW 4 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 5 | N 3 | NE 5 | |
 |  |  | |  | |  | | | |  | | | |  | | | | | |  | |  | | |  | | | | | | |  | | | | |
clear | cloudy | mod rain | mod rain | some clouds | clear | some clouds | some clouds | some clouds | clear | clear | clear | clear | some clouds | cloudy | some clouds | clear | clear | clear | some clouds | light rain | light rain | mod rain | mod rain | some clouds | light rain | some clouds | some clouds | clear | clear | clear | some clouds | light snow | clear | clear | clear | |
km/h | ||||||||||||||||||||||||||||||||||||
— | — | 10 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 8 | 8 | — | 3 | — | — | — | — | — | — | — | — | — | — | |
max°C | 5 | 14 | 15 | 11 | 1 | 2 | 2 | 5 | 6 | 3 | -1 | -3 | -3 | -2 | 2 | 0 | 1 | 3 | 3 | 0 | 4 | 4 | 5 | 6 | 3 | 4 | 4 | 2 | -2 | -1 | -1 | -1 | -1 | 0 | -1 | 1 |
Moonrise | — | — | 7:09 | — | — | 8:01 | — | — | 8:45 | — | — | 9:21 | — | — | 9:50 | — | — | 10:15 | — | — | 10:38 | — | — | 10:58 | — | — | 11:19 | — | — | 11:41 | — | — | 12:07 | — | — | 12:38 |
Moonset | — | — | — | 3:32 | — | — | 4:28 | — | — | 5:30 | — | — | 6:37 | — | — | 7:45 | — | — | 8:53 | — | — | — | 10:01 | — | — | 11:11 | — | — | — | 12:21 | — | — | 1:36 | — | — | 2:55 |
 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:11 | — | — | 7:11 | — | — | 7:11 | — | — | 7:11 |
 | 4:13 | — | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — | — | 4:15 | — | — | 4:15 | — | — | 4:15 | — | — | 4:16 | — | — | 4:16 | — | — | 4:17 | — | — | 4:19 | — | — |
Today's sea temperature in Deer Island (south end), Boston Harbor is 6.2° C (Statistics for 18 Dec 1981-2005 – mean: 7.5 max: 9.9 min: 5.7°C) | ||||||||||||||||||||||||||||||||||||
Nearest