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 — and sunset is at 05:24 PM.

Days 1–4 Weather Summary

Moderate rain (total 11mm), heaviest on Fri afternoon. Icy conditions (max 3°C on Fri afternoon, min -1°C on Sat night). Winds decreasing (strong winds from the E on Fri afternoon, light winds from the N by Sat morning).

Days 5–7 Weather Summary

A moderate fall of snow, heaviest on Mon morning. Icy conditions (max 1°C on Sun afternoon, min -4°C on Mon night). Winds decreasing (severe gales from the NE on Sun night, light winds from the WNW by Tue night).

Days 8–10 Weather Summary

Moderate rain (total 13mm) heaviest on Thu morning, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 5°C on Wed night, min -3°C on Thu night). Winds decreasing (near gales from the SW on Thu morning, calm by Sat morning).

Days 11–13 Weather Summary

Light rain (total 8mm), mostly falling on Sat night. Freeze-thaw conditions (max 7°C on Sun afternoon, min -5°C on Mon night). Winds increasing (light winds from the SE on Sat night, near gales from the W by Mon morning).

Thu
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
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
PM
night
Wave Height Map
High Tide
8:56PM0.98m
9:16AM0.89m
9:40PM0.99m
10:02AM0.84m
10:28PM0.98m
10:52AM0.78m
11:19PM0.95m
11:47AM0.73m
00:17AM0.91m
12:49PM0.68m
1:23AM0.87m
2:00PM0.66m
2:41AM0.86m
3:18PM0.69m
3:58AM0.88m
4:27PM0.76m
5:02AM0.93m
5:25PM0.85m
5:54AM0.97m
6:15PM0.93m
6:39AM0.99m
7:00PM0.99m
7:21AM0.98m
7:42PM1.02m
8:00AM0.95m
8:22PM1.01m
8:37AM0.90m
Low Tide
2:32PM-0.17m
2:59AM-0.11m
3:03PM-0.17m
3:41AM-0.08m
3:40PM-0.15m
4:30AM-0.03m
4:23PM-0.11m
5:34AM0.02m
5:14PM-0.06m
7:20AM0.06m
6:18PM-0.02m
8:46AM0.05m
7:44PM0.01m
9:53AM0.02m
9:23PM-0.01m
10:51AM-0.03m
10:37PM-0.05m
11:42AM-0.08m
11:37PM-0.11m
12:26PM-0.13m
00:28AM-0.15m
1:05PM-0.16m
1:12AM-0.16m
1:39PM-0.17m
1:52AM-0.16m
2:08PM-0.16m
2:28AM-0.13m
2:32PM-0.13m
Wave
height (m) 
direction
period (s) 
0.6
S
8
0.6
S
8
0.8
SSE
6
1.4
ESE
5
1.1
SE
7
0.7
SSE
7
0.5
SSE
7
0.6
S
8
0.7
E
3
1.3
E
5
2.5
E
7
3
E
8
2.5
SSE
11
1.1
SE
12
0.8
ESE
11
0.6
ESE
11
0.4
SE
10
0.4
SE
10
0.5
SSW
4
0.6
S
7
1.5
SSW
5
2
S
9
1.2
S
10
0.7
S
9
0.7
S
9
0.9
SSE
8
0.8
SSE
7
1
S
9
0.9
S
8
1.2
S
8
1.1
S
8
0.9
SSE
8
1.2
SSW
6
1.6
WSW
5
1.5
W
5
0.9
W
4
0.9
WSW
4
0.4
SSW
5
0.3
SE
8
0.3
S
6
0.3
SSE
7
0.7
S
8
0.6
S
8
0.4
S
7
0.5
SE
4
0.6
SSE
5
0.9
SE
6
part cloud
part cloud
light rain
mod rain
rain showers
part cloud
cloud
part cloud
cloud
light snow
mod snow
mod snow
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
mod rain
rain showers
part cloud
cloud
cloud
snow showers
part cloud
cloud
mod rain
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
light snow
snow showers
part cloud
clear
part cloud
clear
clear
cloud
some clouds
some clouds
light rain
mod rain
rain shwrs
some clouds
cloudy
some clouds
cloudy
light snow
mod snow
mod snow
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
rain shwrs
mod rain
rain shwrs
some clouds
cloudy
cloudy
snow shwrs
some clouds
cloudy
mod rain
some clouds
clear
clear
some clouds
some clouds
clear
clear
some clouds
some clouds
some clouds
light snow
snow shwrs
some clouds
clear
some clouds
clear
clear
cloudy
 km/h
10
ESE
20
E
25
ESE
45
E
25
NW
10
WNW
10
E
25
ENE
35
ENE
45
ENE
70
NE
75
NNE
55
N
30
NW
25
NW
20
WNW
15
WNW
25
WSW
20
SSW
20
SW
45
SW
50
W
30
NW
10
ENE
20
E
30
N
5
WNW
20
SSW
15
SE
25
W
20
WSW
25
W
45
W
50
W
50
W
35
W
30
WSW
15
NNW
5
NNE
10
SSW
20
NNE
25
NE
15
ESE
15
E
25
ENE
25
ESE
20
E
 mm 
1
9
1
2
8
3
8
max°C
2
2
2
3
3
3
2
0
1
1
1
0
-1
-1
0
1
0
1
3
5
5
5
0
-2
-1
0
0
2
6
3
7
5
0
1
-2
-2
1
0
-3
-2
-1
-2
-2
-2
-3
-2
2
Moonrise
7:54
8:18
8:46
9:20
10:03
10:57
12:02
1:15
2:31
3:45
4:57
6:06
7:13
8:19
9:24
Moonset
8:04
9:16
10:30
11:47
1:03
2:16
3:21
4:14
4:55
5:28
5:55
6:19
6:40
7:00
7:21
Sunrise
6:33
6:31
6:31
6:28
6:28
6:26
6:24
6:22
6:20
6:20
6:18
6:16
6:15
6:13
6:11
Sunset
5:24
5:25
5:27
5:28
5:30
5:30
5:31
5:32
5:34
5:36
5:37
5:37
5:38
5:39
5:40
5:42
Today's sea temperature in Block Island (Old Harbor) is
2.1° C
(Statistics for 19 Feb 1981-2005 – mean: 4.5 max: 6.2 min: 3.1°C)
Issued (local time): 6 pm Thursday 19 Feb 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest