Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 7 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.4°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 10 Sep 2026:

  • Best quality surf: Thursday 10 Sep, 11PM (local time) - 4.5ft (1.3m), 7s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 10 Sep, 5AM (local time) - 8ft (2.4m), 7s period, SW swell with 541 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 11PM (local time) - 4.5ft (1.3m), 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 Thursday (Sep 10) at 11PM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.3m and 10s. 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 2.4m 7s and forecast to arrive on Thursday (Sep 10) at 5AM. 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 3s period and expected on Friday (Sep 11) at 8AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 10th Sep)4.5ft (1.3m) 7s
Best Surf11PM (Thu 10th Sep)4.5ft (1.3m) 7s
Most Powerful 5AM (Thu 10th Sep)8ft (2.4m) 7s

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


The Lowdown

Alright folks, Rusty here. Let’s take a look at what’s in store for us at Block Island over the next couple of weeks. Straight up, I gotta be honest with you – it’s a tough watch. The whole 16-day period is a real struggle for anything decent, with nothing but poor surf conditions flagged from start to finish. The first week is almost a total write-off.

We start on the 10th with a bit of lumpy 6-foot SW windswell, but that 19 mph cross-shore wind has the place chopped to bits. That sets the tone. The 11th brings cleaner conditions early with a nice offshore NNW breeze at 12 mph, but the swell has dropped right off to a measly 3 feet. Saturday the 12th is dead flat. Sunday the 13th sees a bit of a bump with some rainy onshores and a messy 4-foot wave. The whole first week is basically a rinse and repeat of tiny, weak, or blown-out surf.

There’s a glimmer of hope on Monday the 24th. After a long stretch of nothing, we finally get a day that edges into “surfable but very ordinary.” The morning of the 24th shows a 3-foot ESE swell with a period of 10 seconds, and the wind switches to a light offshore from the north. That’ll be clean. The combined energy reading is 193 (moderate energy), so there’s a bit of push there. It’s not pumping, but if you’re desperate, that morning might be your best window. That’s your only real look in the whole 16-day window.

After that, the 25th gets blown out again by a strong 25 mph breeze. The water temp is about average for the time of year around the island, nothing wild there.

Honestly, the standout – if you can call it that – is that one morning on the 24th of September. It’s a point break that rarely breaks, but with that clean, light wind and a moderate energy, you might snag a few. It won't be big, but it’ll be your cleanest shot. Don't expect company though; it’s a place that often has crowds when it’s good, but on a day this average, you might have it to yourself.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Thu afternoon, min 18°C on Fri night). Winds decreasing (strong winds from the SW on Wed night, light winds from the NE by Sat morning).

Days 5-7 Weather Summary

Heavy rain (total 41mm), heaviest during Sun morning. Warm (max 24°C on Mon afternoon, min 19°C on Mon night). Winds decreasing (fresh winds from the S on Sun morning, calm by Mon afternoon).

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
6
1.8
SW
7
1.6
SW
7
1.1
SSW
7
0.8
SSW
6
0.7
SSW
6
0.7
SSW
7
0.3
SE
9
0.3
SE
10
0.4
SE
10
1.1
S
5
0.8
SSW
6
0.4
SE
9
0.4
SE
9
0.7
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.8
SSW
4
Wave Graph
Metric surfscale
Energy kJ
368
331
254
113
45
41
41
15
15
24
61
34
29
22
77
20
20
21
25
Wind (km/h)
50
SW
30
WSW
30
SW
20
NNW
20
NNW
20
WSW
15
NNE
10
E
10
S
15
S
35
S
15
WNW
15
W
10
N
10
SSE
20
SE
25
SSE
25
SSW
30
SW
Wind State
cross-on
cross
cross
off
off
cross
cross-off
cross
on
on
cross-on
cross-off
cross-off
cross-off
on
cross-on
on
cross-on
cross-on
High Tide
7:46AM1.04m
8:07PM1.01m
8:32AM1.08m
8:50PM0.98m
9:16AM1.09m
9:33PM0.93m
9:59AM1.06m
10:14PM0.87m
10:41AM1.01m
10:54PM0.80m
11:24AM0.95m
11:35PM0.73m
Low Tide
1:47AM-0.02m
2:00PM-0.03m
2:25AM-0.03m
2:47PM-0.03m
2:59AM-0.02m
3:32PM-0.01m
3:29AM0.02m
4:16PM0.04m
3:55AM0.06m
4:59PM0.09m
4:21AM0.11m
5:46PM0.16m
4:52AM0.16m
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
light rain
heavy rain
rain showers
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:22
6:24
6:24
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:06
7:04
7:02
7:00
6:59
6:58
6:55
 mm
2
36
3
Temp °C
22
22
26
25
21
23
23
19
21
22
22
23
22
22
24
21
20
22
22
Feels °C
18
19
23
24
17
18
19
18
20
20
20
23
23
22
23
18
17
20
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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