Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 1 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.9° C
0.9° 

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: Friday 7 Aug, 2AM (local time) - 5ft (1.5m), 6s period, SSW swell with 170 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 1.5m 6s and forecast to arrive on Friday (Aug 07) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Tuesday (Aug 11) at 8PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Fri 7th Aug)5ft (1.5m) 6s

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


The Lowdown

Alright folks, Rusty here. Let’s be straight with you: the next 16 days for Block Island are a bit of a bummer, if I’m being honest. We’ve got a long, frustrating stretch ahead before anything worth paddling out for shows up. I’ll walk you through it.

For the first week, it’s pretty grim. From Wednesday the 5th all the way through to Monday the 17th, we’re looking at a run of weak, short-period swell, almost always coming from the SSW. The wave energy barely gets a pulse going, sitting in the double digits or low triple digits (67 to 131) most days, which is weak to moderate at best. The winds are all wrong—cross, cross-on, and often fresh enough to chop things up. There are a couple of glimmers, like Wednesday morning the 12th, when it goes glassy (NNW 5 km/h) with a clean surface, but the swell is a tiny 3 ft at 6 seconds. It’s rideable on a log, but you won’t be getting any real power. The 14th of August has a clean window Friday afternoon as the wind shifts WNW cross-off (19 mph), but the swell is only 4 ft and weak (71 combined energy). The onshore wind returns quickly after.

Then we hit a real dead zone from the 15th to the 18th. Swell drops to 1 ft to 2 ft, with barely any energy (19 to 66). The wind is either onshore or cross-on, and the period is short. It’s pretty much flat for a beginner and totally uninspiring for anyone. This is a classic late-summer lull around here.

Now, here’s the only thing that gets me talking. By Wednesday the 19th of August, a bigger pulse of SW swell starts to push in. Swell height climbs to 4 ft on Wednesday morning, building to 5 ft by the afternoon, with the energy jumping significantly (191). Then Thursday the 20th of August is the standout: 6 ft from the SW at 7 seconds, and the energy finally cracks into strong territory at 412. This is the biggest swell in the whole forecast.

But—and there’s always a but—the wind on both those days is still cross-onshore (SW and SSW at 12–19 mph), so it’s going to be choppy and lumpy. This is a beach setup, exposed to that SW wind, so the conditions will be messy. For a seasoned surfer who doesn’t mind a battle, Thursday morning the 20th could offer some punchy, powerful waves, but it won’t be clean. For beginners, that 6 ft with onshore wind is a no-go. Given the wind and consistent chop, this setup honestly looks more interesting for kite surfing than paddle surfing.

To sum it up: there are no good days for clean, quality surf in the next 16 days. That run from the 5th to the 18th is a long, dry spell with nothing to recommend. The 19th and 20th have the size but lack the wind to make it special. Nor’easters might change this, but right now, it’s a waiting game.

Stay patient, and keep an eye on the forecasts—it tends not to stay poor for long.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Fri night. Warm (max 28°C on Fri afternoon, min 24°C on Wed afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sat night. Warm (max 29°C on Sun afternoon, min 24°C on Sat afternoon). Wind will be generally light.

Wed
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
PM
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
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
7
0.5
SE
6
0.9
SSW
5
1.2
SSW
6
1.5
SSW
6
1.1
SSW
6
1.1
SSW
6
1.2
SSW
6
0.9
SSW
6
1
SSW
6
1.2
SSW
6
1.3
SSW
6
1.2
SSW
7
1.1
SSW
6
0.9
SSW
6
0.7
SSW
6
1.1
SSW
5
1.1
SW
6
1
SSW
6
0.9
SSW
5
Wave Graph
Metric surfscale
Energy kJ
35
19
46
93
170
88
91
96
55
72
96
130
120
100
55
37
66
69
63
42
Wind (km/h)
15
SSW
20
SW
20
SW
25
SW
25
SW
15
SW
30
SW
10
WSW
20
WSW
30
SW
10
WSW
15
WSW
25
SW
10
NW
10
SE
20
SSW
25
WSW
25
W
25
WSW
10
NW
Wind State
cross-on
cross-on
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross
off
cross-on
cross-on
cross
cross-off
cross
cross-off
High Tide
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
7:08AM0.90m
7:37PM1.09m
Low Tide
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
1:07PM-0.05m
2:13AM-0.03m
clear
clear
clear
clear
clear
clear
clear
thunderstorm
part cloud
clear
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:47
5:48
5:48
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:58
7:57
7:55
7:54
7:52
7:52
7:51
 mm
2
1
3
Temp °C
25
25
25
27
26
26
28
27
25
24
25
26
29
29
26
26
26
26
28
27
Feels °C
23
27
27
27
26
28
27
27
26
23
26
27
27
28
25
27
26
25
27
26
  • 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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