Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 7 pm 04 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 5 Sep 2026:

  • Most powerful swell: Thursday 10 Sep, 5AM (local time) - 10ft (3.0m), 8s period, SW swell with 1,060 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 3.0m 8s 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 0.9m 5s period and expected on Sunday (Sep 06) at 2PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Thu 10th Sep)10ft (3.0m) 8s

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


The Lowdown

Alright, this is Rusty. Let's talk about Block Island.

Look, I gotta be straight with you. We're looking at a pretty quiet stretch ahead. The forecast is showing a long run of days where the swell just isn't doing us any favors. The first real recommendation isn't until the 5th of September, and honestly, even that's a bit of a stretch. The energy is weak, with a combined swell energy of just 27. It's a tiny 1 ft swell from the SSW with a short period of 6 seconds. The wind is a cross-offshore from the NE, so it'll be clean, but there's just nothing to ride.

We're looking at a gap of several days here with no real surf to get excited about. The swell stays tiny, under 2 ft for most of the time, and the wind is all over the place, mostly onshore or cross-shore, making things messy. The water temperature is about average for the time of year.

Now, there is a bit of a pulse that comes through starting Wednesday the 9th. The swell height picks up to 4 ft from the SW, but the wind is a fresh cross-onshore at 19 mph, which is going to turn it into a lumpy, messy mess. The combined energy raises to 101 (moderate wave energy), but with that wind, it's a no-go. Thursday the 10th gets a bit cleaner with a cross-offshore wind from the W at 22 mph, and the swell is a solid 7 ft from the SSW. That's big, but with a period of only 8 seconds, it's a windswell, not the best shape. The energy is strong at 535, but 7 ft is big for most.

After that, it drops right back off. The 18th of September shows a bit of hope with a clean offshore wind from the NW at 19 mph, but the swell is barely 2 ft. The 19th and 20th also have clean conditions with a moderate offshore breeze, but the swell is still tiny, around 2 ft to 3 ft. The energy is climbing a bit, hitting 102 and 111 (moderate wave energy), but it's still very small.

So, the best of a bad bunch? Honestly, if you're a beginner, there's nothing here that's safe and fun. For the more experienced, the only window that might be worth a look is Thursday the 10th. The cross-offshore winds will make it clean, but that 7 ft SW swell is going to be a bit of a handful and not the best quality. It's a big, lumpy windswell. For everyone else, this is a classic Block Island lull. It's a point break that rarely breaks, and this forecast proves it. The place is often crowded, but with this forecast, you'll have the place to yourself for a reason.

Rusty, signing off.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sat afternoon. Warm (max 26°C on Fri night, min 16°C on Sun morning). Winds decreasing (fresh winds from the ENE on Sat night, light winds from the S by Sun afternoon).

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed night. Warm (max 24°C on Mon night, min 21°C on Mon night). Winds increasing (light winds from the WNW on Tue morning, near gales from the SW by Wed night).

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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)
0.4
SE
8
0.4
SSW
6
0.3
SE
8
0.7
ENE
5
0.4
E
8
0.6
ENE
7
0.4
E
9
0.4
E
10
0.4
E
10
0.3
E
10
0.3
E
9
0.6
SW
4
0.6
SW
4
1.3
SW
5
2.1
SW
6
3
SW
8
2
SSW
8
1.5
SSW
8
0.9
SSW
7
Wave Graph
Metric surfscale
Energy kJ
16
11
9
26
20
43
25
30
30
16
15
10
10
93
320
932
527
253
81
Wind (km/h)
20
NNW
15
NE
25
ENE
15
NE
15
NE
5
S
20
NNW
15
NW
10
WSW
15
NW
10
WNW
25
SW
20
WSW
30
SW
45
SW
55
SW
35
W
35
WNW
30
NNW
Wind State
off
cross-off
cross
cross-off
cross-off
cross-on
off
cross-off
cross
off
cross-off
cross
cross
cross-on
cross-on
cross
cross-off
cross-off
off
High Tide
2:32AM0.71m
3:13PM0.94m
3:50AM0.73m
4:30PM0.96m
5:02AM0.80m
5:35PM0.99m
6:03AM0.88m
6:31PM1.01m
6:57AM0.97m
7:21PM1.02m
7:46AM1.04m
8:07PM1.01m
Low Tide
9:21PM0.17m
8:08AM0.12m
10:31PM0.14m
9:43AM0.11m
11:29PM0.10m
11:08AM0.07m
00:20AM0.05m
12:13PM0.02m
1:06AM0.01m
1:09PM-0.02m
1:47AM-0.02m
2:00PM-0.03m
2:25AM-0.03m
clear
clear
rain showers
part cloud
rain showers
part cloud
clear
clear
clear
part cloud
part cloud
clear
part cloud
cloud
clear
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:18
6:18
6:20
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:13
7:10
7:08
7:07
7:06
7:04
 mm
2
2
1
Temp °C
26
20
20
19
17
18
20
20
24
24
22
24
24
23
22
23
23
23
19
Feels °C
23
18
17
14
15
17
17
17
21
21
20
21
20
22
18
17
20
17
11
  • 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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