Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 1 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.4°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 (11 Sep):

  • Morning surf: Morning surf (11 Sep, local time) - 3ft (0.9m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (11 Sep, local time) - 2ft (0.6m), 6s period with SSW swell.
  • Evening surf: Evening surf (11 Sep, local time) - 1.5ft (0.5m), 6s period with SSW swell.

The current surf forecast for Block Island at 5PM is: 0.6m 6s primary swell from a South-southwest direction and 0.3m 9s secondary swell from a Southeast direction (forecast issued at 01:00pm September 11). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (11 Sep)3ft (0.9m)6s
Afternoon (11 Sep)2ft (0.6m)6s
Evening (11 Sep)1.5ft (0.5m)6s

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


Short Range Forecast

Heavy rain (total 59mm), heaviest during Sun morning. Warm (max 23°C on Fri afternoon, min 17°C on Sat morning). Wind will be generally light.

Fri
11
Saturday
12
Sunday
13
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
6
0.6
SSW
6
0.6
SSW
6
0.5
SSW
6
0.5
SSW
6
0.6
SSW
6
0.5
SSW
6
0.3
SE
9
0.3
SE
9
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.9
SSE
5
0.9
SSE
5
0.9
SSE
5
0.9
SSE
5
0.9
SSE
5
0.9
SSE
5
0.9
SSE
6
Wave Graph
Metric surfscale
Energy kJ
44
29
26
18
19
26
21
14
14
14
15
15
24
24
34
42
43
45
39
42
45
Wind (km/h)
20
NNW
15
WSW
20
SW
15
WNW
10
NNW
15
NNE
20
NE
15
NE
10
E
10
ESE
10
SSE
15
SSE
20
SSE
20
SSE
20
SSE
25
SE
30
SSW
10
WNW
15
WNW
15
NNW
5
WNW
Wind State
off
cross
cross
cross-off
off
cross-off
cross-off
cross-off
cross
cross-on
on
on
on
on
on
on
cross-on
cross-off
cross-off
off
cross-off
High Tide
8:32AM1.08m
8:50PM0.98m
9:16AM1.09m
9:33PM0.93m
9:59AM1.06m
10:14PM0.87m
Low Tide
2:47PM-0.03m
2:59AM-0.02m
3:32PM-0.01m
3:29AM0.02m
4:16PM0.04m
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
part cloud
part cloud
cloud
light rain
heavy rain
heavy rain
light rain
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:00
6:59
 mm
3
30
16
1
Temp °C
20
22
23
23
22
19
18
17
18
20
21
21
22
22
22
21
22
21
21
20
20
Feels °C
17
19
19
20
20
16
15
14
16
20
21
19
20
20
21
20
21
23
22
21
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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