Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 1 pm 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.1° C
0.9° 

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 (17 Jul):

  • Morning surf: Morning surf (17 Jul, local time) - 1.5ft (0.4m), 5s period with SSW swell.
  • Afternoon surf: Afternoon surf (17 Jul, local time) - 1.5ft (0.5m), 6s period with SSW swell.
  • Evening surf: Evening surf (17 Jul, local time) - 2.5ft (0.7m), 5s period with SSW swell.

The current surf forecast for Block Island at 6PM is: 0.6m 6s primary swell from a South-southwest direction and 0.1m 8s secondary swell from a Southeast direction, 0.1m 14s secondary swell from a Southeast direction (forecast issued at 01:00pm July 17). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (17 Jul)1.5ft (0.4m)5s
Afternoon (17 Jul)1.5ft (0.5m)6s
Evening (17 Jul)2.5ft (0.7m)5s

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


Short Range Forecast

Moderate rain (total 12mm), heaviest on Sat afternoon. Warm (max 26°C on Fri afternoon, min 19°C on Sun night). Winds decreasing (strong winds from the SW on Sat afternoon, calm by Mon morning).

Fri
17
Saturday
18
Sunday
19
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
1
2
1
0
1
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
SSW
5
0.5
SSW
6
0.6
SSW
6
0.7
SSW
6
0.6
SSW
5
0.4
SSW
5
0.6
SSW
5
0.5
SSW
4
0.8
SSW
4
1.1
SSW
5
1.1
SSW
5
1.1
S
4
1.3
SSW
5
1.8
SSW
6
2.2
SW
7
2.3
SW
7
1.6
SW
7
1.5
SSW
7
1.3
SSW
7
1.3
SSW
7
1.1
SSW
7
Wave Graph
Metric surfscale
Energy kJ
9
18
21
27
19
9
15
12
17
48
56
48
90
265
489
543
261
234
193
164
118
Wind (km/h)
15
WNW
20
WSW
20
SW
20
WSW
15
WSW
15
WSW
15
SW
20
SSW
25
SSW
45
SW
40
S
40
SSW
35
SW
40
SW
30
WSW
30
WNW
20
NW
20
WNW
20
WNW
15
NW
20
NW
Wind State
cross-off
cross
cross-on
cross
cross
cross
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross
cross-off
cross-off
off
cross-off
cross-off
off
off
High Tide
10:56AM1.00m
11:11PM0.97m
11:49AM0.98m
00:00AM0.88m
12:42PM0.95m
Low Tide
5:07PM0.01m
5:43AM-0.02m
6:08PM0.07m
6:28AM0.03m
7:10PM0.13m
part cloud
clear
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
light rain
thunderstorm
light rain
thunderstorm
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:15
8:15
 mm
4
1
1
2
4
Temp °C
23
24
26
25
24
22
22
23
23
22
21
22
22
22
22
22
23
25
26
25
23
Feels °C
20
19
21
21
21
21
22
22
21
16
17
19
20
19
20
20
20
21
22
22
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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