Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 7 am 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.6°C
0.4° 

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 (10 Sep):

  • Morning surf: Morning surf (10 Sep, local time) - 7ft (2.1m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (10 Sep, local time) - 5.5ft (1.7m), 7s period with SW swell.
  • Evening surf: Evening surf (10 Sep, local time) - 5ft (1.6m), 7s period with SW swell.

The current surf forecast for Block Island at 10AM is: 2.0m 7s primary swell from a Southwest direction and 0.3m 9s secondary swell from a Southeast direction, 0.1m 8s secondary swell from a East direction (forecast issued at 07:00am September 10). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (10 Sep)7ft (2.1m)7s
Afternoon (10 Sep)5.5ft (1.7m)7s
Evening (10 Sep)5ft (1.6m)7s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Warm (max 25°C on Thu afternoon, min 18°C on Sat morning). Winds decreasing (fresh winds from the WSW on Thu morning, light winds from the ESE by Sat morning).

Thursday
10
Friday
11
Saturday
12
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
1
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)
2.5
SW
7
2.2
SW
7
2
SW
7
1.7
SW
7
1.6
SW
7
1.6
SW
7
1.3
SSW
7
1.1
SSW
7
1
SSW
7
0.9
SSW
6
0.8
SSW
6
0.7
SSW
6
0.8
SSW
6
0.6
SSW
7
0.8
SSW
7
0.7
SSW
7
0.6
SSW
7
0.5
SSW
6
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
576
489
400
301
240
227
150
110
83
57
44
39
40
35
59
40
29
23
15
15
15
15
15
Wind (km/h)
50
SW
40
WSW
30
WSW
25
SW
30
SW
15
WSW
10
WNW
15
NNW
15
NNW
25
NNW
15
NNW
15
W
20
WSW
15
NW
10
NW
10
N
15
NE
10
ENE
10
ESE
10
SSE
15
S
15
S
20
S
Wind State
cross
cross
cross
cross
cross
cross
cross-off
off
off
off
off
cross-off
cross
off
off
cross-off
cross-off
cross
cross-on
on
on
on
on
High Tide
7:46AM1.04m
8:07PM1.01m
8:32AM1.08m
8:50PM0.98m
9:16AM1.09m
9:33PM0.93m
Low Tide
2:00PM-0.03m
2:25AM-0.03m
2:47PM-0.03m
2:59AM-0.02m
3:32PM-0.01m
cloud
cloud
part cloud
clear
clear
clear
clear
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:02
7:00
 mm
Temp °C
22
22
22
24
25
25
24
22
21
20
22
24
24
24
21
20
19
18
20
21
22
22
23
Feels °C
16
18
19
22
22
24
24
20
18
16
19
21
20
21
19
18
17
17
20
20
21
20
21
  • 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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