Block Island (Old Harbor) Sea Conditions and Tide Table

Block Island (Old 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 06:43 AM and sunset is at 05:15 PM.

Days 1–3 Weather Summary

Light rain (total 6mm), mostly falling on Thu morning. Icy conditions (max 7°C on Thu morning, min -7°C on Fri night). Winds decreasing (strong winds from the WNW on Thu night, light winds from the NW by Fri night).

Days 4–6 Weather Summary

A dusting of snow. Milder later with heavy rain (total 44mm) on Sat night. Icy conditions (max 10°C on Sun morning, min -9°C on Mon night). Winds increasing (calm on Sat morning, gales from the W by Mon afternoon).

Days 7–9 Weather Summary

A heavy fall of snow, heaviest during Wed night. Becoming milder with light rain (total 2mm) on Thu morning. Freeze-thaw conditions (max 2°C on Thu morning, min -9°C on Tue night). Mainly gales.

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 3°C on Mon morning, min -8°C on Fri night). Winds decreasing (strong winds from the NW on Fri morning, light winds from the NW by Sat morning).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
7:25AM0.94m
7:44PM0.90m
8:01AM0.92m
8:23PM0.90m
8:35AM0.88m
9:00PM0.88m
9:09AM0.84m
9:35PM0.85m
9:42AM0.77m
10:09PM0.81m
10:17AM0.71m
10:43PM0.77m
10:54AM0.64m
11:20PM0.74m
11:34AM0.59m
00:03AM0.70m
12:22PM0.54m
00:56AM0.68m
1:21PM0.51m
2:05AM0.68m
2:35PM0.51m
3:26AM0.72m
3:52PM0.57m
4:33AM0.79m
Low Tide
1:50PM-0.12m
1:44AM-0.11m
2:19PM-0.12m
2:17AM-0.09m
2:43PM-0.11m
2:48AM-0.07m
3:03PM-0.08m
3:19AM-0.03m
3:25PM-0.04m
3:53AM0.02m
3:52PM0.00m
4:31AM0.07m
4:26PM0.05m
5:17AM0.12m
5:05PM0.09m
6:20AM0.17m
5:55PM0.12m
8:21AM0.19m
6:58PM0.14m
9:37AM0.16m
8:16PM0.13m
10:34AM0.11m
9:42PM0.08m
Wave
height (m) 
direction
period (s) 
0.7
ENE
3
0.8
ESE
4
1.9
ESE
6
2.2
SE
8
1.5
SE
8
1.5
SSW
6
1.1
SW
6
0.9
SW
5
0.5
S
8
0.2
S
8
0.3
SSE
3
1.4
SE
5
1.6
SSE
7
3
S
11
2.2
S
11
1.9
S
11
2.2
WSW
5
1.9
W
5
1.4
W
5
1.3
W
5
0.9
W
4
0.6
WNW
3
0.4
SSE
8
0.2
SSE
8
2.3
E
6
2.2
SE
9
1.6
SSE
10
1.3
SSE
10
1
SSE
10
0.8
NW
4
0.5
NW
3
0.2
SSE
8
0.3
WSW
2
0.4
WSW
3
0.5
W
3
0.5
SW
3
part cloud
cloud
light rain
light rain
cloud
clear
cloud
part cloud
part cloud
cloud
light snow
light snow
heavy rain
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
heavy snow
light snow
mod snow
cloud
cloud
cloud
clear
clear
clear
cloud
cloud
cloud
part cloud
some clouds
cloudy
light rain
light rain
cloudy
clear
cloudy
some clouds
some clouds
cloudy
light snow
light snow
heavy rain
rain shwrs
some clouds
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
heavy snow
light snow
mod snow
cloudy
cloudy
cloudy
clear
clear
clear
cloudy
cloudy
cloudy
some clouds
 km/h
30
NE
30
ENE
45
ESE
40
SE
40
WSW
50
WNW
40
WNW
35
NW
25
NW
5
W
20
SSE
45
SE
35
SSW
55
SW
50
W
60
W
70
W
60
W
50
W
45
WNW
40
WNW
30
WNW
20
W
20
ENE
65
ENE
45
NNW
30
WNW
45
NW
40
NW
35
NW
25
NW
20
WNW
20
W
25
W
25
W
30
WSW
 mm 
2.0
4
26
14
4
2.0
max°C
1
1
3
7
6
3
-1
-1
-6
-5
0
8
10
8
1
-3
-5
-8
-5
-4
-7
-5
-3
-2
2
1
-3
-4
-3
-6
-3
-1
-1
0
1
1
Moonrise
5:28
6:33
7:36
8:38
9:38
10:40
11:43
12:47
1:51
2:53
3:49
Moonset
7:00
7:23
7:43
8:02
8:21
8:40
9:02
9:27
9:57
10:35
11:23
12:22
Sunrise
6:43
6:43
6:41
6:39
6:39
6:37
6:35
6:35
6:33
6:31
6:31
6:28
Sunset
5:15
5:16
5:19
5:20
5:21
5:22
5:23
5:24
5:25
5:27
5:28
5:30
Today's sea temperature in Block Island (Old Harbor) is 4.2 °C (Statistics for 12 Feb 1981-2005 – mean: 4.6 max: 6.3 min: 3.2°C)
Issued (local time): 12 pm Wednesday 12 Feb 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest