Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 1 am 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.4° C
1.4° 

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 29 Jul 2026:

  • Best quality surf: Thursday 30 Jul, 11AM (local time) - 4.5ft (1.4m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 29 Jul, 2PM (local time) - 7ft (2.2m), 7s period, SE swell with 424 kJ wave energy.
  • Next surfable swell (1★+): Thursday 30 Jul, 11AM (local time) - 4.5ft (1.4m), 9s period with S 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 Thursday (Jul 30) at 11AM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.3m and 6s. 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 2.2m 7s and forecast to arrive on Wednesday (Jul 29) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Jul 30) at 8PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)11AM (Thu 30th Jul)4.5ft (1.4m) 9s
Best Surf11AM (Thu 30th Jul)4.5ft (1.4m) 9s
Most Powerful 2PM (Wed 29th Jul)7ft (2.2m) 7s

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


The Lowdown

Gather 'round, surf rats. Rusty here. Let's get straight into it for Block Island. This ain't a classic outlook, not by a long shot. We've got a long, dry spell ahead before any real hope shows up. The forecast is a tough one for the next week and a half, with a lot of junk to sift through.

The first week is a write-off. We're looking at a solid 11 days of mostly poor surf conditions. Wednesday the 29th kicks off with a heavy rain and a cross-onshore 25 mph SE wind, making a mess of things. The swell is a weak 6 ft from the SSE (258 total energy), but with that wind, you don't even want to look at it. It stays rough and choppy right through the end of the first week and into the second. Nothing is clean, nothing is consistent. It's a proper bust.

There's a flicker of hope on Thursday the 30th with a morning cross-off wind from the WNW, giving us a clean 5 ft S swell (303 energy), but the score is low and it's only a brief window. It's not enough to get excited about. The rest of the days through Sunday the 4th are plagued by onshore and cross-onshore winds, with most of the swell being small and short-period. It's a survivalist's game out there, not a surfer's.

Then, just when you're about to give up, the light at the end of the tunnel appears. The standout, the reason to keep your board waxed, is the morning of Sunday, August 9th. The wind switches to a clean offshore from the NW at 15 mph, grooming a 4 ft S swell with a long 11-second period. The combined energy is a solid 516, which is moderate and will hold some shape. The forecast says "expect very good surf conditions." This is the one. It's a point break that rarely breaks, so this is a rare treat. The downside? It's a long way out, so keep your fingers crossed.

The absolute best of the best, though, is the morning of Monday, August 10th. This is a proper pulse. We're looking at a 7 ft S swell with a very long 13-second period, and a clean, offshore NNW wind at only 6 mph. The combined energy is a massive 1275 – that's strong wave energy. The forecast says "excellent surf conditions for experienced surfers." This is a solid, powerful groundswell that will be too big for beginners, but for the experienced crew, it's a dream. The long period will make it a bit straight at the beach breaks, but for a point break like this, it's the perfect setup. The water temp is about 69°F, which is a bit colder than normal for this time of year, so don't forget a spring suit.

The afternoon of the 10th turns to crap with a cross-onshore wind, so it's a morning mission. The 11th and 12th offer some leftover swell (5 ft and 5 ft, SE) but the wind is poor again, so it's a mess. The 13th is a total write-off.

So, the bottom line: suffer through the first 11 days, then get ready for the mornings of August 9th and 10th. The 10th is the real standout. That's the one to circle on the calendar.

Rusty.

Short Range Forecast

Heavy rain (total 33mm), heaviest during Wed morning. Warm (max 21°C on Wed morning, min 18°C on Thu afternoon). Winds decreasing (strong winds from the SE on Wed morning, light winds from the ESE by Fri afternoon).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Sun afternoon. Warm (max 25°C on Sun night, min 20°C on Sat morning). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
AM
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
1
2
0
0
1
0
0
0
0
0
0
0
0
0
0
2
1
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)
1.9
SSE
6
1.8
SSE
7
1.6
SSE
8
1.4
S
9
1.1
S
8
0.9
SSE
8
1
S
9
0.9
S
8
0.7
S
8
0.9
S
8
0.7
S
8
0.7
S
8
1.2
S
7
1.1
SSW
7
1.1
S
5
1
S
6
1.2
S
6
1.5
S
8
1.2
S
7
1.1
S
7
0.7
SSW
7
Wave Graph
Metric surfscale
Energy kJ
258
306
283
297
161
101
154
105
55
103
55
57
152
125
66
75
99
248
155
124
48
Wind (km/h)
40
SE
15
SE
20
W
15
WNW
25
NNW
25
NNW
15
N
5
ESE
5
S
10
S
20
SSW
20
SSW
25
S
20
S
15
SSE
5
SSW
15
SW
15
NNW
10
N
20
SSW
15
WSW
Wind State
cross-on
cross-on
cross-off
cross-off
off
off
off
cross-on
on
cross-on
cross-on
cross-on
on
cross-on
on
cross-on
cross-on
off
cross-off
cross-on
cross
High Tide
8:42AM0.79m
8:52PM0.93m
9:17AM0.82m
9:22PM0.93m
9:50AM0.84m
9:54PM0.92m
10:22AM0.87m
10:28PM0.90m
10:55AM0.89m
11:07PM0.87m
11:33AM0.91m
11:50PM0.83m
12:17PM0.93m
00:39AM0.78m
Low Tide
2:24PM0.11m
3:15AM0.05m
3:01PM0.11m
3:42AM0.04m
3:37PM0.11m
4:06AM0.04m
4:15PM0.11m
4:32AM0.04m
4:56PM0.12m
5:02AM0.05m
5:42PM0.13m
5:39AM0.06m
6:38PM0.14m
heavy rain
rain showers
part cloud
cloud
light rain
cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
cloud
light rain
light rain
part cloud
clear
thunderstorm
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:37
5:39
5:39
5:41
5:41
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:06
8:05
8:04
8:02
8:01
8:00
7:59
 mm
27
4
2
1
2
1
Temp °C
21
21
21
20
19
19
20
21
21
21
21
22
23
23
25
22
23
24
23
24
24
Feels °C
19
18
22
19
18
16
20
22
22
22
21
22
21
21
25
23
24
25
23
22
22
  • 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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