Castle Island, Boston Harbor Sea Conditions and Tide Table

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 06:19 PM.

	Days 1–4 Weather Summary Mostly dry. Warm air temperatures (max 23°C on Thu afternoon, min 6°C on Tue morning). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Cool air temperatures (max 19°C on Thu night, min 10°C on Sat morning). Wind will be generally light.									Days 8–10 Weather Summary Moderate rain (total 13mm), heaviest on Sun night. Very mild (max 19°C on Mon afternoon, min 9°C on Tue night). Wind will be generally light.									Days 11–13 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Warm (max 24°C on Thu afternoon, min 8°C on Fri morning). Wind will be generally light.									Days 14–17 Weather Summary Moderate rain (total 10mm), heaviest on Sat night. Warm (max 20°C on Wed afternoon, min 2°C on Mon morning). Wind will be generally light.
		Tuesday 6			Wednesday 7			Thursday 8			Friday 9			Saturday 10			Sunday 11			Monday 12			Tuesday 13			Wednesday 14			Thursday 15			Friday 16			Saturday 17			Sunday 18			Monday 19			Tuesday 20			Wed 21
	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	night	AM
Wave Height Map See all maps
High Tide	7:25PM3.05m	8:14AM2.78m		8:32PM3.08m	9:13AM2.92m		9:32PM3.12m	10:05AM3.07m		10:27PM3.15m	10:52AM3.18m		11:16PM3.15m		11:34AM3.25m	00:01AM3.11m		12:14PM3.27m	00:44AM3.03m		12:53PM3.24m	1:26AM2.93m		1:33PM3.17m	2:08AM2.81m		2:14PM3.07m	2:52AM2.69m		2:57PM2.96m	3:39AM2.56m		3:45PM2.84m	4:30AM2.46m		4:37PM2.74m		5:25AM2.40m		5:34PM2.68m	6:22AM2.41m		6:32PM2.66m
Low Tide	1:55AM0.11m		2:14PM0.32m	2:55AM0.06m		3:16PM0.18m	3:49AM0.01m		4:12PM0.04m	4:38AM-0.02m			5:02PM-0.07m	5:22AM-0.01m		5:49PM-0.13m	6:04AM0.04m		6:32PM-0.13m	6:44AM0.12m		7:15PM-0.09m	7:25AM0.23m		7:57PM-0.00m	8:06AM0.35m		8:40PM0.12m	8:49AM0.48m		9:26PM0.25m	9:35AM0.60m		10:15PM0.37m	10:25AM0.70m		11:08PM0.47m		11:19AM0.76m	00:03AM0.52m		12:17PM0.76m
Wave Height (m) Direction Period (s)	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	clear	clear	clear	clear	clear	clear	clear	some clouds	cloudy	heavy rain	cloudy	some clouds	some clouds	some clouds	clear	clear	clear	clear	some clouds	some clouds	some clouds	clear	some clouds	some clouds	light rain	light rain	some clouds	mod rain	light rain	some clouds	clear	clear	cloudy	some clouds	some clouds	clear	some clouds	clear
km/h	WNW	WNW	WNW	W	SW	SSW	SW	SW	WSW	W	WNW	WNW	WSW	NW	NW	S	SSW	SSW	ESE	N	N	NNE	ENE	ESE	S	SSW	SSW	SW	WSW	NNW	NNE	E	SE	SSE	SSW	SW	NW	NNW	NNW	NW	W	SSW	SSW	WSW	W	SW	W
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	13	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	1	—	9	2	—	—	—	—	—	—	—	—	—
max °C	14	9	15	12	13	18	14	20	23	19	15	18	15	12	15	14	15	18	14	14	19	16	10	11	9	13	16	16	21	24	14	9	11	16	21	24	15	9	10	5	5	10	8	13	17	13	18
Moonrise	—	2:06	—	—	3:20	—	—	4:32	—	—	5:41	—	—	6:50	—	—	7:58	—	—	9:07	—	—	10:13	—	—	11:17	—	—	12:16	—	—	1:06	—	—	1:49	—	—	2:24	—	—	2:53	—	—	—	3:18	—	—
Moonset	—	—	4:24	—	—	4:47	—	—	5:09	—	—	5:29	—	—	5:51	—	—	6:15	—	—	6:43	—	—	7:15	—	—	7:55	—	—	8:42	—	—	—	9:37	—	—	10:37	—	—	11:40	—	—	—	12:46	—	—	1:51
	—	6:46	—	—	6:47	—	—	6:48	—	—	6:48	—	—	6:50	—	—	6:50	—	—	6:52	—	—	6:54	—	—	6:54	—	—	6:56	—	—	6:56	—	—	6:58	—	—	6:58	—	—	7:00	—	—	7:01	—	—	7:03
	6:19	—	6:16	—	—	6:15	—	—	6:14	—	—	6:12	—	—	6:10	—	—	6:08	—	—	6:07	—	—	6:06	—	—	6:04	—	—	6:01	—	—	6:00	—	—	5:59	—	—	5:58	—	—	5:55	—	—	5:54	—	—
	Today's sea temperature in Castle Island, Boston Harbor is 16.2°C (Statistics for 05 Oct 1981-2005 – mean: 15.4 max: 17.0 min: 13.7°C)