Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 1 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
21.9° C
0.1° 

Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Block Island today (11 Aug):

  • Morning surf: Morning surf (11 Aug, local time) - 2ft (0.6m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (11 Aug, local time) - 1.5ft (0.5m), 6s period with S swell.
  • Evening surf: Evening surf (11 Aug, local time) - 2.5ft (0.7m), 6s period with SSW swell.

The current surf forecast for Block Island at 5AM is: 0.5m 6s primary swell from a South direction and 0.1m 9s secondary swell from a Southeast direction (forecast issued at 01:00am August 11). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (11 Aug)2ft (0.6m)6s
Afternoon (11 Aug)1.5ft (0.5m)6s
Evening (11 Aug)2.5ft (0.7m)6s

Table - waves today at Block Island. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 3mm), mostly falling on Thu night. Warm (max 27°C on Tue night, min 22°C on Tue night). Winds increasing (light winds from the E on Wed morning, strong winds from the SW by Thu afternoon).

Tuesday
11
Wednesday
12
Thursday
13
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
6
0.5
S
6
0.6
SSW
6
0.7
SSW
6
0.5
S
6
0.7
SW
6
0.7
SSW
6
0.7
SW
6
0.7
SSW
5
0.5
SSW
6
0.7
SW
5
0.5
SSW
5
0.4
SSW
5
0.4
SSW
5
0.2
ESE
8
0.3
SSW
6
0.6
SW
4
0.6
WSW
4
0.6
SW
4
0.8
SW
5
0.9
SW
5
0.9
SSW
5
1.3
SSW
5
1.2
SSW
6
Wave Graph
Metric surfscale
Energy kJ
18
17
25
28
16
32
28
41
26
17
29
15
10
10
7
8
10
9
11
29
41
47
83
90
Wind (km/h)
20
W
20
WNW
15
WNW
20
W
25
SW
20
WSW
10
NW
10
W
10
NNW
10
N
10
NE
5
E
10
S
15
SW
15
SW
20
SW
15
W
10
NW
10
WNW
10
SW
20
SW
40
SW
20
SSW
30
SW
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross
off
cross-off
off
off
cross-off
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-on
cross-on
cross
cross-on
cross-on
High Tide
7:08AM0.90m
7:37PM1.09m
8:02AM0.97m
8:27PM1.09m
8:53AM1.03m
9:14PM1.05m
Low Tide
1:27AM0.00m
1:07PM-0.05m
2:13AM-0.03m
2:05PM-0.06m
2:57AM-0.05m
3:00PM-0.05m
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
cloud
cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
thunderstorm
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:52
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:51
7:49
7:47
 mm
1
Temp °C
23
23
23
24
25
26
27
26
23
22
22
23
23
24
24
24
23
22
22
24
25
23
23
24
Feels °C
23
23
24
24
23
26
27
26
23
21
22
23
22
23
23
23
23
21
21
24
24
18
22
22
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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