Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 1 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
21.2°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 (31 Aug):

  • Morning surf: Morning surf (31 Aug, local time) - 1.5ft (0.4m), 8s period with SE swell.
  • Afternoon surf: Afternoon surf (31 Aug, local time) - 1.5ft (0.4m), 8s period with SE swell.
  • Evening surf: Evening surf (31 Aug, local time) - 1.5ft (0.4m), 8s period with SE swell.

The current surf forecast for Block Island at 9PM is: 0.4m 8s primary swell from a Southeast direction and 0.4m 5s secondary swell from a Southwest direction, 0.3m 2s secondary swell from a South-southeast direction (forecast issued at 01:00pm August 31). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (31 Aug)1.5ft (0.4m)8s
Afternoon (31 Aug)1.5ft (0.4m)8s
Evening (31 Aug)1.5ft (0.4m)8s

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


Short Range Forecast

Heavy rain (total 31mm), heaviest during Tue morning. Warm (max 22°C on Mon night, min 18°C on Tue night). Mainly fresh winds.

Mon
31
Tuesday
1
Wednesday
2
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)
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.3
SE
8
0.4
SE
8
0.4
SE
7
0.9
SE
4
1.6
ESE
6
1.6
ESE
6
1.6
ESE
6
1.5
ESE
6
1.4
ESE
6
1.4
ESE
6
1.4
ESE
6
1.3
ESE
6
1.3
ESE
7
1.3
ESE
7
1.2
SE
7
Wave Graph
Metric surfscale
Energy kJ
23
17
17
16
15
14
10
16
12
28
145
167
179
159
150
150
145
126
145
150
131
Wind (km/h)
15
ENE
15
ESE
15
SSE
20
S
20
S
20
S
15
SW
20
SW
20
WSW
5
SSW
35
ESE
35
E
35
E
30
E
30
E
30
E
30
E
25
E
25
E
25
E
20
SE
Wind State
cross
cross-on
on
on
on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
10:23AM0.99m
10:44PM0.88m
11:05AM1.00m
11:30PM0.83m
11:52AM0.99m
Low Tide
4:38PM0.06m
4:27AM0.03m
5:25PM0.09m
5:08AM0.05m
6:26PM0.13m
part cloud
part cloud
clear
part cloud
cloud
cloud
mod rain
mod rain
rain showers
light rain
light rain
light rain
light rain
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:21
7:19
7:17
 mm
8
10
3
1
1
2
1
Temp °C
20
21
21
21
21
22
20
21
21
22
19
18
18
19
18
19
19
20
20
20
21
Feels °C
18
19
19
20
20
22
21
22
21
25
15
13
14
16
14
15
16
17
17
18
20
  • 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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