Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 1 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
21.9° 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 11 Aug 2026:

  • Best quality surf: Monday 17 Aug, 2PM (local time) - 6ft (1.9m), 7s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 17 Aug, 11AM (local time) - 7ft (2.1m), 7s period, SSW swell with 437 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 2PM (local time) - 6ft (1.9m), 7s period with SSW swell.

Best Forecast Surf Conditions for Block Island this week:

The surf forecast for Block Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 2PM. The primary swell is predicted to be 1.9m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Block Island in the next 16 days are 2.1m 7s and forecast to arrive on Monday (Aug 17) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Aug 14) at 11PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Mon 17th Aug)6ft (1.9m) 7s
Best Surf 2PM (Mon 17th Aug)6ft (1.9m) 7s
Most Powerful11AM (Mon 17th Aug)7ft (2.1m) 7s

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


The Lowdown

Alright, this is Rusty. Let’s break down what’s in the water around Block Island.

I gotta be straight with you – it’s a rough outlook. We’re looking at a big gap of nothing before anything even gets a nod. The first real chance to surf doesn’t pop up until Monday, August 17th, so you’ve got about a week of flat and messy conditions to sit through.

Water temp is sitting around 71°F at the start, which is about dead average for the season, so the wetsuit choice is normal.

Tuesday August 11th through Sunday August 16th? Forget it. Tiny swell, messy cross-shore breezes, and the energy is pathetic – barely registering a couple dozen (combined energy of all swells directed here). It’s just not worth a look.

Then, out of nowhere, Monday August 17th morning shows a pulse. We’re looking at 7ft from the SSW with a 7-second period, and the energy jumps to 437 (moderate wave energy). The wind is cross-offshore from the west at 16 mph, which should clean it up a bit. But here’s the thing – that’s a solid size, and Block Island is a point break that *rarely breaks*. It’s inconsistent. So, this is a standout for experienced surfers who know the spot and can handle the likely crowds. The afternoon drops to 6ft and goes cross-shore, so the morning window is the only shot.

After that, it’s back to small stuff. Tuesday August 18th has a clean 4ft from the south with a glassy morning, but the energy is weak (132) and the period is short. It’s a teaser, not a session.

So, bottom line: the only real standout is Monday August 17th morning, but it’s for the dedicated locals. The rest of the forecast is a waiting game for something better.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Tue night. Warm (max 26°C on Tue afternoon, min 22°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 18mm), heaviest on Sun night. Warm (max 25°C on Fri afternoon, min 17°C on Sat morning). Winds increasing (calm on Sun morning, strong winds from the SW by Sun night).

Tue
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SW
6
0.7
SSW
6
0.5
SSW
5
0.4
SSW
5
0.6
SW
4
0.6
SSW
5
0.7
SSW
6
0.7
SSW
6
0.5
S
5
0.5
S
5
0.5
S
6
0.5
S
7
0.6
S
7
0.6
S
7
0.6
S
7
0.6
S
7
1.4
SSW
5
2.1
SSW
7
1.7
SSW
7
1.3
S
7
Wave Graph
Metric surfscale
Energy kJ
32
27
15
10
10
17
27
31
14
14
16
26
34
38
39
38
107
437
286
163
Wind (km/h)
25
SW
10
NNW
10
ENE
15
SSW
10
WNW
15
WSW
25
SW
10
WNW
5
WNW
25
N
30
N
15
N
15
NNW
20
N
5
NW
20
SSW
45
SSW
25
W
15
WSW
15
N
Wind State
cross
off
cross
cross-on
cross-off
cross
cross-on
cross-off
cross-off
off
off
cross-off
off
off
glassy
cross-on
cross-on
cross-off
cross
off
High Tide
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
11:16AM1.01m
11:28PM0.84m
12:04PM0.96m
00:13AM0.76m
Low Tide
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
5:35PM0.08m
5:24AM0.07m
6:30PM0.15m
part cloud
thunderstorm
rain showers
clear
part cloud
part cloud
part cloud
thunderstorm
part cloud
rain showers
clear
clear
part cloud
clear
clear
cloud
heavy rain
thunderstorm
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:54
5:54
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:51
7:49
7:47
7:46
7:45
7:44
7:42
 mm
1
1
2
1
14
3
Temp °C
26
26
23
24
24
23
25
26
24
25
21
20
25
25
20
23
23
23
26
26
Feels °C
25
25
23
25
24
22
24
26
24
22
18
17
22
22
19
22
20
21
27
25
  • 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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