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 06:33 AM and sunset is at 07:07 PM.

Days 1–3 Weather Summary

Light rain (total 5mm), mostly falling on Fri morning. Cool air temperatures (max 12°C on Sun afternoon, min 3°C on Sat morning). Winds decreasing (strong winds from the WNW on Fri night, light winds from the E by Sun night).

Days 4–6 Weather Summary

Heavy rain (total 45mm), heaviest during Wed afternoon. Low air temperatures (max 8°C on Wed afternoon, min 3°C on Wed night). Winds increasing (light winds from the S on Mon night, strong winds from the E by Tue afternoon).

Days 7–9 Weather Summary

Light rain (total 7mm), mostly falling on Thu morning. Mild temperatures (max 8°C on Sat afternoon, min 3°C on Thu morning). Winds decreasing (strong winds from the NNW on Thu night, light winds from the E by Sat afternoon).

Days 10–12 Weather Summary

Mostly dry. Warm (max 22°C on Mon afternoon, min 4°C on Tue night). Winds increasing (light winds from the WNW on Sun morning, fresh winds from the ENE by Tue night).

Friday
29
Saturday
30
Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
Sunday
7
Monday
8
Tuesday
9
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
10:46AM0.74m
11:08PM0.89m
11:31AM0.70m
11:54PM0.86m
12:21PM0.67m
00:48AM0.83m
1:20PM0.66m
1:50AM0.82m
2:27PM0.67m
3:02AM0.84m
3:41PM0.72m
4:17AM0.88m
4:52PM0.82m
5:23AM0.95m
5:51PM0.95m
6:19AM1.02m
6:43PM1.08m
7:09AM1.06m
7:31PM1.18m
7:57AM1.08m
8:18PM1.24m
8:44AM1.05m
9:04PM1.25m
Low Tide
4:17PM0.03m
5:08AM0.09m
4:57PM0.07m
5:56AM0.14m
5:45PM0.10m
7:02AM0.17m
6:46PM0.13m
8:59AM0.16m
8:04PM0.14m
10:12AM0.11m
9:44PM0.10m
11:07AM0.03m
11:07PM0.02m
11:54AM-0.05m
00:10AM-0.06m
12:37PM-0.12m
1:06AM-0.15m
1:18PM-0.17m
1:58AM-0.20m
1:57PM-0.20m
2:48AM-0.22m
2:35PM-0.20m
3:36AM-0.19m
Wave
height (m) 
direction
period (s) 
1.1
SE
10
1.1
SE
11
1.1
SSW
7
1.2
W
4
0.7
SSW
6
0.5
SE
11
0.5
SE
11
0.5
SE
10
0.4
SE
10
0.5
SE
10
0.4
SE
10
0.3
SE
10
0.6
SE
3
1.4
SE
5
1.9
SE
8
1.8
SE
7
1.4
SE
7
1.2
SSE
10
1.4
S
10
1.4
S
10
1
S
11
1.2
NNE
4
0.9
NE
4
0.4
ESE
10
0.5
ESE
11
0.4
ESE
12
0.4
ESE
11
0.4
SE
12
0.4
ESE
11
0.4
SE
11
0.4
W
2
0.4
SSW
5
0.4
E
3
0.4
ESE
4
0.7
E
4
0.8
E
5
light rain
cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
heavy rain
mod rain
light rain
heavy rain
light rain
light rain
light rain
light rain
cloud
light rain
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
light rain
cloudy
clear
clear
clear
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
some clouds
cloudy
heavy rain
mod rain
light rain
heavy rain
light rain
light rain
light rain
light rain
cloudy
light rain
rain shwrs
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
cloudy
cloudy
cloudy
 km/h
40
NNW
35
NW
40
WNW
40
WNW
30
WSW
15
NW
20
WNW
20
WNW
5
E
20
E
10
SSE
10
S
25
SE
50
E
35
ENE
40
ENE
10
N
35
W
35
WNW
45
NNW
45
NNW
45
N
30
N
20
NNW
20
NNE
15
SSW
20
W
20
WSW
25
SW
15
W
25
W
20
W
20
E
20
NE
30
NE
25
ENE
 mm 
5
11
7
5
20
2.0
1.0
1.0
2.0
2.0
1.0
max°C
5
9
7
5
9
10
8
12
12
7
7
7
7
4
6
6
8
7
5
5
4
5
6
6
5
8
8
11
17
18
16
22
21
8
7
4
Moonrise
11:56
1:02
2:05
3:00
3:46
4:24
4:55
5:22
5:47
6:11
6:37
Moonset
8:22
8:57
9:41
10:36
11:42
12:56
2:14
3:33
4:52
6:11
7:30
8:50
Sunrise
6:33
6:31
6:30
6:28
6:26
6:24
6:22
6:22
6:20
6:18
6:16
6:15
Sunset
7:07
7:08
7:09
7:10
7:12
7:13
7:15
7:15
7:16
7:17
7:19
7:20
Today's sea temperature in Block Island (Old Harbor) is 6.0 °C (Statistics for 29 Mar 1981-2005 – mean: 5.4 max: 6.8 min: 3.6°C)
Nearest