Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 7 pm 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.0°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 (15 Sep):

  • Afternoon surf: Afternoon surf (15 Sep, local time) - 1ft (0.3m), 9s period with SE swell.
  • Evening surf: Evening surf (15 Sep, local time) - 0.5ft (0.2m), 9s period with ESE swell.

The current surf forecast for Block Island at 10PM is: 0.2m 9s primary swell from a East-southeast direction and 0.4m 4s secondary swell from a East direction (forecast issued at 07:00pm September 15). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (15 Sep)--
Afternoon (15 Sep)1ft (0.3m)9s
Evening (15 Sep)0.5ft (0.2m)9s

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


Short Range Forecast

Mostly dry. Warm (max 26°C on Fri afternoon, min 16°C on Tue night). Wind will be generally light.

Tue
15
Wednesday
16
Thursday
17
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.3
E
7
0.4
E
7
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
0.4
E
8
0.4
E
8
0.4
E
8
0.4
E
7
0.4
E
7
0.8
SW
4
Wave Graph
Metric surfscale
Energy kJ
8
8
8
8
8
8
8
8
8
17
19
20
21
20
19
18
17
16
19
Wind (km/h)
5
ESE
5
SE
10
SE
5
S
5
WSW
10
WSW
15
SW
20
SW
25
SW
25
SW
20
SW
15
WSW
15
WSW
10
SW
20
SSW
20
SW
25
SW
25
SW
25
SW
Wind State
cross-on
on
on
on
cross
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
11:35PM0.73m
12:09PM0.88m
00:20AM0.66m
1:03PM0.82m
Low Tide
5:46PM0.16m
4:52AM0.16m
6:44PM0.22m
5:32AM0.20m
7:58PM0.27m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:55
6:53
6:52
 mm
Temp °C
16
16
16
16
16
16
17
18
18
19
20
20
20
20
21
21
21
21
22
Feels °C
15
15
15
16
16
15
15
15
15
16
18
19
20
20
20
19
19
19
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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