Block Island surfForecast / Rhode Island / USA

information circle48hr Weather and Surf, issued 1 pm Monday 20 Apr 2026 EDT
Forecast update in hr  min  s Forecast update imminent
Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Block Island sea temperature is
6.8° C
(Which is normal for this time of year)

How big are the waves at Block Island today?

The current surf forecast for Block Island at 9PM is: 0.4m 7s primary swell from a South-southwest direction and 0.2m 7s secondary swell from a East direction (forecast issued at 01:00pm April 20). The wind direction is predicted to be offshore.

Time (EDT) & DateWave HeightWave Period
Morning (20 Apr)1.5ft (0.5m)7s
Afternoon (20 Apr)1.5ft (0.5m)7s
Evening (20 Apr)1.5ft (0.4m)7s

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


Updates in  hr  min  s Forecast update imminent
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.5
S
0.5
S
0.5
S
0.4
SSW
0.3
SSW
0.2
E
0.2
E
0.2
E
0.2
E
0.5
NE
0.4
NE
0.3
ENE
0.3
E
0.3
SE
0.3
SE
0.7
S
0.9
S
1.1
S
0.8
SW
0.8
SW
1.1
S
0.7
SW
0.8
SE
0.7
SSW
Period(s) (?)777778888557788445666656
Wave
Graph
(?)Metric surfscale
Energy kJ (?)242223189555512711101010132850364075353233
Wind
(km/h)
15
W
20
WSW
15
W
15
NW
25
N
30
NNE
25
NNE
20
NNE
10
NE
15
SSW
20
SW
25
SSW
25
SSW
30
SSW
25
SSW
25
S
30
S
30
S
25
SSE
20
SE
10
ENE
15
NNE
10
N
10
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
off
offoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
ononcross-
on
crosscross-
off
offcross-
off
High Tide
/ height (m)
10:40AM
0.83
11:02PM
1.04
11:35AM
0.79
12:00AM
0.97
12:37PM
0.76
1:05AM
0.89
Low Tide
/ height (m)
4:15PM
-0.09
5:53AM
-0.04
5:10PM
-0.03
7:03AM
0.02
6:20PM
0.04
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Sunrise-------5:58-------5:56-------5:54
Sunset--7:30-------7:31-------7:32-----
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
cloud
part cloud
cloud
clear
Rain (mm)
-----------------111----
Temp. °C777854334455554656677777
Feels °C (?)2222-2-4-5-40-2-2-2-2-3-3-1-3-1034444
  • 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

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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