Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 1 am 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
21.9° C
0.2° 

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 (12 Aug):

  • Morning surf: Morning surf (12 Aug, local time) - 1.5ft (0.5m), 5s period with SSW swell.
  • Afternoon surf: Afternoon surf (12 Aug, local time) - 1.5ft (0.4m), 5s period with SSW swell.
  • Evening surf: Evening surf (12 Aug, local time) - 2ft (0.6m), 5s period with SSW swell.

The current surf forecast for Block Island at 6AM is: 0.5m 6s primary swell from a South-southwest direction and 0.2m 8s secondary swell from a East-southeast direction (forecast issued at 01:00am August 12). The wind direction is predicted to be offshore.

Time (EDT) & DateWave HeightWave Period
Morning (12 Aug)1.5ft (0.5m)5s
Afternoon (12 Aug)1.5ft (0.4m)5s
Evening (12 Aug)2ft (0.6m)5s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Thu morning. Warm (max 27°C on Thu night, min 20°C on Fri morning). Wind will be generally light.

Wednesday
12
Thursday
13
Friday
14
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)
0.6
SSW
6
0.5
SSW
6
0.5
SSW
5
0.5
SSW
5
0.4
SSW
5
0.4
SSW
5
0.6
SSW
5
0.6
SW
4
0.8
SW
4
0.9
SW
4
1.2
SW
5
1
SW
5
0.8
SW
5
0.8
SW
5
0.7
SSW
5
0.6
SSW
5
0.6
SSW
5
0.5
SSW
5
0.3
SE
9
0.3
S
6
0.3
SE
9
0.6
SSW
5
0.7
SW
4
0.6
SW
4
Wave Graph
Metric surfscale
Energy kJ
21
17
17
15
10
10
17
10
17
29
66
48
29
34
23
18
18
15
14
6
13
19
12
8
Wind (km/h)
10
NW
10
N
10
NNW
0
NNE
15
SW
20
SW
25
WSW
20
SW
15
W
5
W
5
ESE
20
W
20
WSW
25
WSW
20
NW
20
NNW
20
NNW
20
NNW
20
NNW
10
NW
15
WSW
20
WSW
15
NNW
20
N
Wind State
off
cross-off
off
glassy
cross-on
cross
cross
cross
cross-off
cross-off
cross-on
cross-off
cross
cross-off
off
off
off
off
off
off
cross
cross
off
cross-off
High Tide
8:02AM0.97m
8:27PM1.09m
8:53AM1.03m
9:14PM1.05m
9:42AM1.05m
9:59PM0.99m
Low Tide
2:13AM-0.03m
2:05PM-0.06m
2:57AM-0.05m
3:00PM-0.05m
3:38AM-0.05m
3:53PM-0.02m
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
cloud
cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:49
7:47
7:46
 mm
1
1
Temp °C
25
23
22
23
24
26
25
25
24
23
21
22
23
26
27
24
22
22
20
23
25
25
26
23
Feels °C
26
23
21
24
23
24
23
24
24
24
22
22
22
24
24
21
19
19
17
22
22
22
23
19
  • 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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