Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 1 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
22.2° C
0.1° 

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 9 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 8PM (local time) - 7ft (2.1m), 6s period, SSW swell with 349 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 2.1m 6s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Saturday (Aug 15) at 2AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Sun 16th Aug)7ft (2.1m) 6s

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


The Lowdown

Alright, it's Rusty here, and let me tell you, it's been a tough stretch for us in the Block Island zone. We are looking at a solid gap with basically nothing worth paddling out for from now all the way through to the morning of Sunday, August 17th. That's over a week of flat, messy, or just plain weak conditions.

For the first week, don't even bother. We've got tiny windswell, mostly from the south, with heights barely scraping 3ft and periods so short they're just wobbles. The wind is all over the place—cross, cross-on, sometimes a bit of cross-off—but none of it is good enough to save the day. The energy readings are low, mostly in the double digits or barely breaking 100. It's a write-off.

Now, the light at the end of the tunnel shows up on Monday morning, August 17th. That’s the one to circle. We finally get a bit of a pulse from the SSW, pushing up to 7ft. Now, 7ft is solid, and with a period of 8 seconds it's still a short-period windswell, but the real kicker is the wind. It's a fresh offshore from the NNW at 19 mph, which will clean it right up. The combined swell energy jumps to a solid moderate reading of 459, so there's some push behind it. This is going to be a powerful, chunky wave. Because the swell is over 8ft? No, it's right at that 7ft mark, so it's solid intermediate territory. The offshore wind is the big plus here, promising some hollow, pitching faces if you can find the right bank. Remember, Block Island is a point break and it's exposed to the swell, but it's also "rarely breaks" and crowds are "often," so don't expect to have it to yourself.

The following Monday afternoon, August 17th, backs off a little to 6ft from the SSW with a light NNE cross-off breeze. Cleaner, a bit easier, but the energy drops to 306. It’s a solid secondary session.

For the rest of the second week, it fades back into the small stuff and onshore junk. Tuesday the 18th and Wednesday the 19th look choppy and blown out, with a long-period SE swell that won't do much for this setup. Thursday the 20th has a tiny 2ft SE swell with a 10-second period and a glassy offshore in the morning, but it's just too small to get excited about.

So, to sum it up: the only real window is the morning of Monday, August 17th. That's the standout. Clean, solid, offshore wind. It's a long way off, so keep an eye on it, but that's the one to point the car at. The rest is a waiting game.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Mon night. Warm (max 29°C on Sun night, min 22°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Wed night. Warm (max 26°C on Thu afternoon, min 18°C on Sat morning). Wind will be generally light.

Sun
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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)
1
SSW
6
0.8
SSW
6
0.6
SSW
6
0.5
S
5
0.4
S
6
0.9
SSW
6
0.9
SSW
6
0.6
SSW
6
0.5
S
6
0.5
S
6
0.7
SSW
6
0.9
SW
4
0.7
SW
4
0.3
SE
9
0.5
S
6
0.6
S
7
0.6
S
7
0.9
S
8
0.9
S
8
0.7
S
8
Wave Graph
Metric surfscale
Energy kJ
75
44
24
13
13
51
57
25
16
15
35
27
16
13
15
33
35
99
100
60
Wind (km/h)
25
SW
10
NNW
5
SSE
15
SSW
20
WSW
15
WNW
20
W
10
NW
10
ESE
10
SSW
15
NNW
20
WNW
25
WSW
20
NNW
20
NNW
25
WSW
15
NNW
10
NE
15
SSW
15
SSW
Wind State
cross
off
glassy
cross-on
cross
cross-off
cross-off
off
cross-on
cross-on
off
cross-off
cross
off
off
cross-off
off
cross-off
cross-on
cross-on
High Tide
5:43PM1.04m
6:10AM0.82m
6:44PM1.08m
7:08AM0.90m
7:37PM1.09m
8:02AM0.97m
8:27PM1.09m
8:53AM1.03m
9:14PM1.05m
9:42AM1.05m
9:59PM0.99m
10:29AM1.05m
10:44PM0.92m
Low Tide
00:36AM0.05m
12:02PM-0.01m
1:27AM0.00m
1:07PM-0.05m
2:13AM-0.03m
2:05PM-0.06m
2:57AM-0.05m
3:00PM-0.05m
3:38AM-0.05m
3:53PM-0.02m
4:17AM-0.03m
4:44PM0.02m
4:52AM0.02m
clear
clear
clear
clear
rain showers
part cloud
clear
clear
part cloud
thunderstorm
thunderstorm
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:52
5:52
5:54
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:52
7:52
7:51
7:49
7:47
7:46
7:45
 mm
3
1
2
Temp °C
28
29
23
26
26
24
28
28
24
25
24
24
26
25
22
22
21
20
21
22
Feels °C
27
28
23
25
26
25
26
26
24
26
26
22
23
21
17
17
18
18
18
20
  • 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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