Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 7 pm 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.7° C
1.2° 

Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Block Island surf forecast from 5 Aug 2026:

  • Most powerful swell: Monday 10 Aug, 5AM (local time) - 5ft (1.6m), 6s period, SW swell with 201 kJ wave energy.

Best Forecast Surf Conditions for Block Island this week:

The most powerful waves expected at Block Island in the next 16 days are 1.6m 6s and forecast to arrive on Monday (Aug 10) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Tuesday (Aug 11) at 2AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Mon 10th Aug)5ft (1.6m) 6s

Table - best surf conditions forecast for Block Island over the next 16 days.


The Lowdown

Alright, crew, Rusty here. Let’s cut to the chase. This 16-day forecast for Block Island is mostly a bummer. We’ve got a long dry spell of weak, messy surf before one solid window shows up. Don't get too excited, but there is a light at the end of the tunnel.

For the next week and a half, we’re looking at mostly small, weak swell from the SSW, with onshore and cross-shore winds making a mess of things. The energy is weak, mostly under 100 (like 68, 80, 99) and only briefly touching the low 100s (106, 120). The period is short, 6 to 7 seconds, so it’s all wind-slop. The water is a bit colder than usual for this time of year, running about 2°F colder at 69°F.

There’s a couple of mornings on the 13th and 14th where it goes glassy, but the swell is just too small (about 3ft) to be worth the paddle out. Then the wind swings around and messes it up again.

The one and only standout is the morning of Saturday, August 15th. That’s over a week away, so take it with a grain of salt, but it’s the one to circle on the calendar. The swell jumps to a solid 7ft from the SSW, with an 8-second period. The energy reading jumps to 595 – that’s a huge spike and means there’s some serious power behind it. The wind is forecast to be glassy, which is exactly what you want.

With 7ft, that’s a proper size, and it’s not for beginners. It’s going to be too big for anyone just starting out. The period is still short, so it won’t be the cleanest, most powerful groundswell, but with that much energy and clean conditions, Block Island point should be firing. The good window is likely to be short, as the afternoon forecast calls for the wind to turn onshore.

Saturday afternoon the swell drops slightly to 7ft but the wind gets messy, so be on it early. The following morning, Sunday the 16th, still has some size (5ft) but the wind is cross-shore and it’s looking marginal.

After that, it’s all over. The swell backs right down to under 3ft and the winds are all over the place. It’s a dead end.

So there you have it. A whole lot of nothing, with one potentially epic morning on Saturday the 15th. It’s a one-shot deal, so hope the forecast holds. Otherwise, it looks like a good time to catch up on sleep.

Rusty out.

Short Range Forecast

Mostly dry. Warm (max 29°C on Fri afternoon, min 23°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Fri night. Warm (max 29°C on Sun afternoon, min 22°C on Fri night). Mainly fresh winds.

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
7
0.7
SSW
7
0.6
SSW
7
0.6
SSW
6
0.7
SSW
6
0.9
SSW
6
1.4
SSW
6
1
SSW
6
1
SSW
6
1.2
SSW
6
1
SSW
6
1.2
SSW
6
1
SSW
6
1.1
SSW
6
1.1
SSW
6
1.4
SW
6
1.3
SSW
6
1.4
SW
6
1.2
SSW
6
Wave Graph
Metric surfscale
Energy kJ
73
51
35
30
39
61
127
70
72
93
71
93
68
104
104
157
128
137
121
Wind (km/h)
5
NW
10
SW
15
SW
15
SW
15
SW
25
SSW
20
WSW
15
SW
25
SW
15
WSW
25
SW
30
SW
10
WNW
20
W
25
SW
15
SW
20
SW
30
SW
25
WSW
Wind State
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross-off
cross-off
cross
cross
cross
cross-on
cross
High Tide
00:39AM0.78m
1:08PM0.94m
1:35AM0.74m
2:09PM0.95m
2:40AM0.71m
3:20PM0.97m
3:52AM0.71m
4:35PM1.00m
5:04AM0.75m
5:43PM1.04m
6:10AM0.82m
6:44PM1.08m
Low Tide
6:24AM0.07m
7:51PM0.16m
7:16AM0.08m
9:20PM0.16m
8:19AM0.08m
10:36PM0.14m
9:31AM0.06m
11:40PM0.10m
10:49AM0.03m
00:36AM0.05m
12:02PM-0.01m
1:27AM0.00m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
thunderstorm
part cloud
clear
thunderstorm
clear
clear
part cloud
clear
rain showers
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:45
5:46
5:47
5:48
5:48
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:59
7:58
7:57
7:55
7:54
7:52
7:52
 mm
4
5
1
2
Temp °C
24
24
25
25
25
26
26
26
29
27
23
24
23
26
29
27
27
27
28
Feels °C
24
23
22
27
27
26
27
28
28
25
24
23
22
26
27
25
27
25
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Block Island Surf forecast

The above surf forecast table for Block Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Block Island can be found by selecting the local surf guide option on the grey menu. Our Block Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Block Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Block Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Block Island is 33 km (20 miles) from Westerly. If you plan a vacation in Rhode Island, look for hotels and other accommodation in Westerly. Westerly has rooms for a wide range of budgets as well as car hire and transport links.

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