Surf Break

Lat Long: 41.15° N 71.59° W

Block Island 48 hour detailed Surf Forecast

Issued: 7 am 25 Sep 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
19.3°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 (25 Sep):

  • Morning surf: Morning surf (25 Sep, local time) - 8ft (2.5m), 12s period with ESE swell.
  • Afternoon surf: Afternoon surf (25 Sep, local time) - 10ft (3.0m), 12s period with ESE swell.
  • Evening surf: Evening surf (25 Sep, local time) - 15ft (4.5m), 11s period with E swell.

The current surf forecast for Block Island at 3PM is: 3.0m 12s primary swell from a East-southeast direction and 2.5m 7s secondary swell from a Northeast direction (forecast issued at 07:00am September 25). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (25 Sep)8ft (2.5m)12s
Afternoon (25 Sep)10ft (3.0m)12s
Evening (25 Sep)15ft (4.5m)11s

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


Short Range Forecast

Heavy rain (total 60mm), heaviest during Sat night. Very mild (max 18°C on Sun morning, min 14°C on Fri morning). Winds decreasing (gales from the NE on Fri night, fresh winds from the NE by Sun afternoon).

Friday
25
Saturday
26
Sunday
27
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
0
0
0
0
0
0
0
2
0
0
0
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)
2.5
ESE
11
2.5
ESE
12
3.5
E
11
3
ESE
12
2.5
ESE
12
4.5
E
11
5
E
11
5
E
11
4.5
ENE
10
4.5
ENE
10
4
ENE
10
4
ENE
10
4
ENE
8
4
ENE
8
3.5
ENE
8
3.5
ENE
8
3.5
ENE
8
3
ENE
8
2
S
9
1.9
S
9
2.3
ENE
6
2.2
ENE
6
2.2
ENE
6
Wave Graph
Metric surfscale
Energy kJ
1542
1807
3302
2103
2002
4624
5045
5254
4836
4250
3492
2854
2155
2055
1733
1603
1680
1150
661
550
393
377
406
Wind (km/h)
50
NE
55
NE
55
NE
55
NE
60
NE
65
NE
70
NE
70
NE
75
NE
65
NE
65
NE
65
NE
65
NE
70
NE
70
NE
65
NE
60
ENE
50
ENE
40
ENE
35
NE
35
NE
50
NE
45
NE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
High Tide
7:32AM0.95m
7:42PM0.92m
8:04AM1.01m
8:19PM0.94m
8:39AM1.05m
8:58PM0.93m
Low Tide
1:43PM0.05m
1:41AM-0.01m
2:20PM0.01m
2:10AM-0.03m
2:58PM-0.01m
cloud
cloud
cloud
cloud
light rain
light rain
light rain
light rain
light rain
mod rain
light rain
light rain
light rain
light rain
mod rain
mod rain
light rain
light rain
light rain
cloud
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
6:38
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
—
6:35
—
—
 mm
—
—
—
—
1
2
2
1
1
6
5
2
3
4
9
6
2
1
1
—
1
2
1
Temp °C
14
14
15
16
14
14
14
14
14
14
14
15
15
15
16
16
17
18
18
17
17
17
16
Feels °C
5
4
4
6
3
2
1
0
0
2
2
3
3
3
4
5
8
11
13
13
12
10
9
  • 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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