Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 1 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.9°C
0.0° 

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 30 Aug 2026:

  • Most powerful swell: Wednesday 2 Sep, 11AM (local time) - 5.5ft (1.7m), 6s period, ESE swell with 220 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 1.7m 6s and forecast to arrive on Wednesday (Sep 02) at 11AM. 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 4s period and expected on Friday (Sep 04) at 5PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Wed 2nd Sep)5.5ft (1.7m) 6s

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


The Lowdown

Alright, Rusty here again, giving you the same story in feet and miles.

Looking at Block Island, it’s a tough stretch. This point break rarely breaks as it is, and the next 16 days aren’t doing it any favors. We’re looking at a long, quiet period with nothing that really gets the stoke going. The first even slightly interesting window isn’t until the morning of Wednesday, September 9th.

There’s a big gap of flat or messy conditions from the start through the first week. The combined swell energy stays weak, mostly under 100, through the end of August. The only energy spike is on Wednesday, September 2nd, with a reading of 316, but that’s a 6ft short-period (6 seconds) wind swell getting hammered by 25 mph cross-onshore rain. That’s a total mess – more for kite surfing than paddle surfing.

Thursday, September 3rd, brings a 4ft swell from the SE with moderate cross-shore wind, but the energy is moderate (144) and the conditions are choppy.

Things clean up from Friday, September 4th, through Tuesday, September 8th, with offshore and cross-offshore winds. But the swell is tiny – 1ft to 2ft – and the energy is weak. It’s clean enough for a longboard, but there’s no power.

The closest thing to a standout is the morning of Wednesday, September 9th. We see some size at 5ft from the south, with a 7-second period and a combined energy of 259. The wind is light and onshore, and the conditions are just marginal. For Block Island, that’s the best we get, and it’s still not great.

After that, it fades back into small, lumpy conditions through to Monday, September 14th.

The water temp on Sunday, August 30th, was about 70°, which is normal for the season. For a spot that’s rarely breaking, this kind of quiet run isn’t a total shock, but it’s still a letdown. The board stays on the rack for now.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sun night. Warm (max 24°C on Sun night, min 20°C on Sun night). Winds decreasing (fresh winds from the SW on Sun afternoon, calm by Mon night).

Days 4-6 Weather Summary

Heavy rain (total 96mm), heaviest during Wed afternoon. Warm (max 25°C on Fri afternoon, min 18°C on Fri night). Mainly strong winds.

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
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
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)
0.4
SE
8
0.9
SW
4
0.8
SSW
5
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.4
SE
7
0.4
SE
8
1.4
ESE
6
1.7
ESE
6
1.5
ESE
6
1.4
ESE
6
1.2
SE
7
1.1
SE
7
0.9
ESE
8
0.7
ESE
7
0.5
ESE
7
0.4
ESE
7
0.4
E
8
0.4
E
8
0.3
E
8
Wave Graph
Metric surfscale
Energy kJ
25
29
33
23
17
14
12
17
114
220
192
160
127
116
101
40
25
18
24
19
10
Wind (km/h)
20
WSW
30
SW
20
NW
10
E
15
SSW
5
NNE
5
SE
15
ESE
25
ESE
40
ESE
50
ENE
15
ESE
20
SW
20
S
15
WNW
20
NW
25
WNW
20
NNW
15
NNW
15
NW
20
NNE
Wind State
cross
cross
off
cross-on
cross-on
glassy
on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross-on
cross-off
cross-off
cross-off
off
off
off
cross-off
High Tide
9:47AM0.98m
10:03PM0.92m
10:23AM0.99m
10:44PM0.88m
11:05AM1.00m
11:30PM0.83m
11:52AM0.99m
00:21AM0.77m
12:48PM0.97m
1:21AM0.73m
1:55PM0.95m
2:32AM0.71m
3:13PM0.94m
3:50AM0.73m
Low Tide
3:56PM0.05m
3:52AM0.01m
4:38PM0.06m
4:27AM0.03m
5:25PM0.09m
5:08AM0.05m
6:26PM0.13m
5:56AM0.08m
7:52PM0.16m
6:55AM0.10m
9:21PM0.17m
8:08AM0.12m
10:31PM0.14m
part cloud
part cloud
thunderstorm
part cloud
part cloud
part cloud
rain showers
rain showers
part cloud
heavy rain
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
clear
clear
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:11
6:11
6:13
6:13
6:15
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:22
7:21
7:19
7:17
7:15
7:14
7:13
 mm
2
1
1
22
58
2
10
3
1
Temp °C
22
22
24
20
22
22
22
22
21
21
20
21
22
22
23
23
25
23
20
22
20
Feels °C
19
18
23
20
22
21
23
25
21
19
19
21
22
22
24
21
23
19
18
18
16
  • 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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