Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 7 am 18 Oct 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
16.8°C
1.4° 

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 (18 Oct):

  • Morning surf: Morning surf (18 Oct, local time) - 0.5ft (0.1m), 9s period with SE swell.
  • Afternoon surf: Afternoon surf (18 Oct, local time) - 0.5ft (0.1m), 9s period with SE swell.
  • Evening surf: Evening surf (18 Oct, local time) - 2.5ft (0.8m), 5s period with E swell.

The current surf forecast for Block Island at 12PM is: 0.1m 9s primary swell from a Southeast direction and 0.1m 7s secondary swell from a South direction (forecast issued at 07:00am October 18). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (18 Oct)0.5ft (0.1m)9s
Afternoon (18 Oct)0.5ft (0.1m)9s
Evening (18 Oct)2.5ft (0.8m)5s

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


Short Range Forecast

Mostly dry. Very mild (max 13°C on Tue afternoon, min 7°C on Sun morning). Winds increasing (light winds from the E on Sun afternoon, strong winds from the NE by Tue night).

Sunday
18
Monday
19
Tuesday
20
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
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
1
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)
0.2
S
8
0.1
SE
9
0.1
SE
9
0.1
SE
9
0.6
E
5
0.7
E
5
0.9
E
5
0.9
E
5
0.9
E
6
1.4
ESE
9
1.8
ESE
10
2.1
ESE
10
2.3
ESE
10
2.1
ESE
11
2.1
ESE
11
2.1
ESE
11
2.2
ESE
10
2
ESE
10
2
ESE
10
2
ESE
10
2
ESE
9
1.9
ESE
9
3
ENE
9
Wave Graph
Metric surfscale
Energy kJ
4
3
3
3
19
26
43
47
54
333
653
833
1079
992
1054
992
947
788
712
683
669
612
1288
Wind (km/h)
30
NNE
25
NNE
15
NE
15
NNE
10
E
15
E
20
E
20
E
20
ENE
25
NE
30
ENE
30
ENE
40
NE
35
NNE
45
NNE
45
NNE
40
NNE
45
NNE
45
NNE
45
NNE
45
NNE
45
NNE
45
NE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross
cross
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
2:25PM0.72m
3:10AM0.62m
3:31PM0.71m
4:13AM0.68m
4:23PM0.73m
Low Tide
7:03AM0.28m
9:23PM0.25m
9:16AM0.28m
10:09PM0.21m
10:23AM0.24m
10:48PM0.16m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:00
—
—
—
—
—
—
—
7:01
—
—
—
—
—
—
—
7:01
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
6:00
—
—
—
—
—
—
—
6:00
—
—
—
—
—
—
—
5:58
—
—
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
6
7
8
9
11
10
10
10
10
9
10
11
12
10
10
10
10
10
12
13
13
12
12
Feels °C
-2
0
3
4
7
5
5
5
5
3
3
4
4
2
1
1
1
1
3
4
3
3
3
  • 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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