Block Island surfForecast / Rhode Island / USA

information circle48hr Weather and Surf, issued 1 pm Sunday 17 May 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
9.4° C
(Which is 1.6°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 9PM is: 1.1m 7s primary swell from a Southwest direction and 0.6m 8s secondary swell from a Southeast direction, 0.5m 8s secondary swell from a South direction (forecast issued at 01:00pm May 17). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (17 May)3ft (0.9m)8s
Afternoon (17 May)3ft (0.9m)8s
Evening (17 May)3.5ft (1.1m)7s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 24°C on Sun afternoon, min 16°C on Mon morning). Winds increasing (light winds from the NW on Sun night, fresh winds from the SW by Tue afternoon).

Sun
17
Monday
18
Tuesday
19
Wed
20
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
2 AM
5 AM
8 AM
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1
SSE
8
0.9
SSE
8
0.9
SSE
8
1.2
SW
7
1.1
SW
7
1.1
SW
7
1
SSW
7
0.9
SSW
7
0.7
SSE
8
0.7
SSE
8
0.8
SSW
6
0.6
SSE
7
0.9
SSW
5
0.5
SE
9
1
SSW
5
0.6
SE
9
1
SSW
5
1.2
SSW
5
1.3
SSW
6
1.6
SSW
6
1.7
SSW
6
1.8
SW
6
1.9
SW
7
1.8
SW
7
Wave Graph
Metric surfscale
Energy kJ
122
100
100
131
116
106
96
68
51
50
41
37
33
37
49
56
58
75
107
156
223
261
342
295
Wind (km/h)
15
WSW
20
SW
30
SW
25
SW
20
WSW
10
NW
15
ENE
20
E
20
ESE
10
SSE
10
SSW
20
SSW
20
SW
25
SW
25
SW
25
SW
25
SW
25
SW
35
SW
30
SW
20
SW
30
SW
25
SW
30
SW
cross
cross
cross-on
cross
cross
off
cross
cross
cross-on
on
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
High Tide
8:43AM0.87m
9:06PM1.17m
9:36AM0.88m
9:59PM1.13m
10:30AM0.87m
10:54PM1.07m
Low Tide
2:19PM-0.12m
3:50AM-0.10m
3:12PM-0.11m
4:47AM-0.07m
4:09PM-0.06m
5:47AM-0.04m
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
clear
cloud
cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:59
8:00
8:00
8:01
Temp °C
20
22
24
24
23
21
19
17
16
16
19
20
20
18
20
19
21
23
23
19
20
21
17
17
18
19
20
19
20
20
17
14
13
16
19
18
18
15
18
17
18
20
19
14
17
17
13
13
Swell 1
Height (m)
Direction
Period (s)
1.1
SW
6
0.9
SSE
8
0.9
SSE
8
0.6
SE
8
0.7
S
7
1.1
SW
7
1
SSW
7
0.9
SSW
7
0.7
SSW
6
0.7
SSE
8
0.6
SSE
7
0.6
SSE
7
0.5
SE
8
0.5
SE
9
0.5
SE
9
0.6
SE
9
0.6
SE
8
0.6
SE
8
0.6
SE
8
0.6
SE
8
0.6
SE
8
0.6
SE
8
0.5
SE
9
0.4
SE
9
Energy kJ
94
100
100
54
54
106
96
68
34
50
37
37
28
37
38
47
45
45
45
44
42
44
38
28
Swell 2
Height (m)
Direction
Period (s)
1
SSE
8
0.5
S
8
0.6
SE
8
0.6
SSE
8
0.7
SSE
8
0.6
SSE
8
0.7
SSE
8
0.6
SSW
6
0.2
ENE
4
0.2
E
4
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
S
16
0.1
S
16
0.1
S
16
0.1
S
15
0.1
S
15
Energy kJ
122
29
54
45
54
40
51
25
1
1
7
7
7
7
7
5
5
5
5
5
Swell 3
Height (m)
Direction
Period (s)
0.2
E
8
0.5
S
7
0.3
ENE
3
0.1
S
13
0.1
S
13
0.1
SE
13
0.1
SE
13
0.1
S
16
0.1
S
16
Energy kJ
5
27
2
4
4
7
7
5
5
Wind waves
Height (m)
Direction
Period (s)
1
SW
6
1
SW
7
1.2
SW
7
1.1
SW
7
0.3
ENE
3
0.8
SSW
6
0.8
SSW
5
0.9
SSW
5
0.9
SSW
5
1
SSW
5
1
SSW
5
1
SSW
5
1.2
SSW
5
1.3
SSW
6
1.6
SSW
6
1.7
SSW
6
1.8
SW
6
1.9
SW
7
1.8
SW
7
Energy kJ
83
85
131
116
2
41
27
33
36
49
56
58
75
107
156
223
261
342
295
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
24
26
24
32
24
0
24
47
445
634
634
634
335
204
204
204
340
209
219
195
24
40
40
24
Best forecast wave conditions in Rhode Island
Rating
(10 max)
2
1
1
2
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
1
1
4
3
3
3
3
3
2
2
1
4
4
4
4
3
1
1
2
2
4
4
Header Global
Rating
(10 max)
8
6
4
4
5
7
5
4
5
4
4
4
4
4
4
4
4
4
4
4
5
4
4
5
  • 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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