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Surf Forecasts:

Block Island surfForecast / Rhode Island / USA

information circle48hr Weather and Surf, issued 7 am Wednesday 18 Mar 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
2.8° C
 (Which is 1.9°C colder than average for this time of year)

How big are the waves at Block Island today?

The current surf forecast for Block Island at 3PM is: 1.3m 10s primary swell from a South-southeast direction and 0.7m 9s secondary swell from a Southwest direction (forecast issued at 07:00am March 18). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (18 Mar)5ft (1.6m)10s
Afternoon (18 Mar)4.5ft (1.3m)10s
Evening (18 Mar)3.5ft (1.1m)9s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wednesday
18
Thursday
19
Friday
20
Sat
21
5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM
Rating
(10 max)
2
3
3
1
0
0
0
0
2
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.7
SSE
1.6
SSE
1.5
SSE
1.3
SSE
1.3
SSE
1.1
S
1
S
1
S
0.9
S
0.9
S
0.8
SSE
0.8
SSE
0.7
SE
0.7
SE
0.7
SE
0.6
SE
0.6
SE
0.7
SE
0.7
SE
0.7
ESE
0.7
ESE
0.8
ESE
0.8
ESE
1.6
SSW
Period(s) (?)1010101099999988999888888996
Wave
Graph
(?)Metric surfscale
Energy kJ (?)53747141131930520216416012712296928179775755727264648686148
Wind
(km/h)
25
NW
15
NNW
15
NNW
10
S
15
SSW
15
S
10
S
10
SSE
5
S
5
SE
10
S
15
S
15
SSW
15
SW
15
SSW
20
SW
15
WSW
5
W
10
SSW
20
SSW
25
SSW
30
SSW
35
SSW
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offoffoncross-
on		cross-
on		cross-
on		onglassglassoncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crosscross-
off		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
8:04AM
0.86
8:23PM
0.94
8:43AM
0.88
9:01PM
0.99
9:24AM
0.88
9:41PM
1.01
Low Tide
/ height (m)
2:02AM
-0.10
2:05PM
-0.12
2:41AM
-0.14
2:36PM
-0.15
3:21AM
-0.16
3:10PM
-0.15
Wednesday
18
Thursday
19
Friday
20
Sat
21
Sunrise-6:52-------6:52-------6:50------
Sunset----6:54-------6:55-------6:57---
clear
part cloud
cloud
cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
Rain (mm)
-----------------------1
Temp. °C-1-2-2-1-1-1-1-1-1000122333345577
Feels °C (?)-9-8-8-6-7-6-6-6-5-4-5-5-4-3-4-3-20-1-2-2-3-22
  • 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

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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.

View detailed surf forecast for Block Island at:
surf-forecast.com

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