Block Island Surf Break

Lat Long: 41.15° N 71.59° W

Block Island Surf Forecast and Surf Report

Issued: 7 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Block Island sea temperature is
20.8°C
0.3° 

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 28 Aug 2026:

  • Best quality surf: Monday 31 Aug, 5AM (local time) - 4.5ft (1.3m), 6s period, WSW swell with offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 5AM (local time) - 2ft (0.6m), 12s period, SE swell with 114 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 5AM (local time) - 4.5ft (1.3m), 6s period with WSW 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 31) at 5AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 1.1m and 6s. Another secondary swell of 0.4m and 8s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Block Island in the next 16 days are 0.6m 12s and forecast to arrive on Wednesday (Sep 02) at 5AM. Winds are predicted to be 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 8AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 31st Aug)4.5ft (1.3m) 6s
Best Surf 5AM (Mon 31st Aug)4.5ft (1.3m) 6s
Most Powerful 5AM (Wed 2nd Sep)2ft (0.6m) 12s

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


The Lowdown

G’day, I’m Rusty. Looks like we’ve got a real quiet stretch ahead for Block Island. The water’s sitting at 69°, which is pretty normal for this time of year, so no surprises there. But the surf? It’s a long, flat spell with no real standouts, and that’s the honest truth.

Right now, through the end of August and into early September, we’re looking at tiny, weak waves with poor conditions almost every day. Friday the 28th kicks off with a small 3ft southeast swell, but the wind is cross and the energy is minimal (117). It’s just not worth paddling out. That same pattern sticks around through Saturday and Sunday, with swell dropping to 1ft and energy falling into the 30s and 40s. The wind gets messy, too—cross-onshore and fresh breezes, making it lumpy and choppy. Not a single session worth calling out.

Then we hit a real dry spell. Monday the 31st through to Wednesday the 3rd of September, we’ve got onshore winds and rain, with swell barely cracking 2ft. The energy climbs a bit on Wednesday morning to 111, but it’s light rain and onshore wind, so the quality is still poor. Thursday the 3rd sees a bit more energy (113 to 128), but it’s cross-shore wind with a lumpy cross-chop, and the swell is only 2ft. Not exciting.

The next few days, from Friday the 4th to Tuesday the 8th, are a mix of clean conditions but tiny surf. On Friday morning the 4th, we get a clean cross-offshore wind with a 2ft southwest swell, but the energy is a weak 57. Saturday the 5th drops to 1.0ft, and Sunday the 6th morning sees a 2ft east swell with a longer period of 11 seconds and clean conditions, but energy is still only 97. That afternoon, the swell nudges up to 3ft with a 12-second period from the east, and energy hits 275, but it’s onshore wind and the surf is still poor. Not the day.

Monday the 7th brings a 2ft east swell with a 11-second period and 159 energy, but the wind is cross-onshore. The afternoon sees a bigger 5ft southwest swell with 201 energy, but the period drops to 6 seconds and it’s cross-onshore and choppy. Still poor. Tuesday the 8th is clean in the morning but the swell is only 3ft and energy is low.

Now, we finally get a bit of a glimmer. Wednesday the 9th and Thursday the 10th have clean conditions with cross-offshore and offshore winds. The swell is small—1ft to 2ft—but the energy is around 77 to 97. It’s clean, but not surfable. Then on Friday the 11th, we see a bit more pulse: 4ft to 5ft south swell with energy up to 312 in the afternoon. But the wind is cross to cross-onshore, so it’s bumpy and choppy. That’s the biggest swell of the whole period, but the quality is still poor.

Saturday the 12th wraps it up with a 4ft to 5ft southwest swell, energy in the 197 to 238 range, and some marginal conditions. The morning is cross-shore and a little cleaner, but the afternoon is onshore and questionable. Still not a standout.

So, bottom line: there’s no good surf on offer in this 16-day window. The few pulses of energy are let down by poor wind and small swell. For Block Island, this dry run is more normal than you’d hope. Keep an eye on forecasts, but for now, the board stays dry.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Sun night. Warm (max 25°C on Fri night, min 17°C on Sat morning). Winds increasing (light winds from the SSW on Fri morning, fresh winds from the SW by Sun night).

Days 4-6 Weather Summary

Heavy rain (total 24mm), heaviest during Wed night. Warm (max 23°C on Mon afternoon, min 19°C on Tue afternoon). Winds increasing (light winds from the NW on Mon morning, fresh winds from the SE by Tue afternoon).

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
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)
0.8
SE
8
0.8
SE
8
0.7
SE
8
0.7
S
7
0.5
SE
8
0.5
SE
8
0.4
SE
8
0.4
SE
8
1
WSW
6
0.4
SE
8
0.4
SE
7
0.4
SE
7
0.6
SE
7
0.3
SE
8
0.5
SE
12
0.6
SE
11
0.6
SE
10
0.6
SE
10
0.6
SE
9
1.1
SSW
5
1
SSW
6
Wave Graph
Metric surfscale
Energy kJ
80
78
61
44
31
34
25
25
60
23
14
11
30
11
72
96
80
64
51
64
65
Wind (km/h)
10
SW
20
SW
25
NNW
15
NNE
15
SW
15
W
20
SW
30
SW
15
NW
10
NW
15
S
15
SSE
25
SSE
35
SE
25
SE
20
SSE
15
S
30
SSW
35
SW
20
WSW
15
NW
Wind State
cross
cross
off
cross-off
cross-on
cross-off
cross
cross-on
off
cross-off
on
on
on
on
on
on
on
cross-on
cross
cross
cross-off
High Tide
8:43AM0.91m
8:50PM0.94m
9:14AM0.95m
9:25PM0.94m
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
Low Tide
2:43PM0.07m
2:55AM0.01m
3:19PM0.05m
3:22AM0.00m
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
clear
part cloud
clear
clear
clear
clear
part cloud
clear
thunderstorm
clear
clear
clear
light rain
mod rain
light rain
light rain
light rain
mod rain
thunderstorm
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:09
6:11
6:11
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:25
7:23
7:22
7:21
7:19
7:17
7:15
 mm
6
1
9
1
2
1
10
2
2
Temp °C
23
24
25
19
21
22
22
23
23
22
23
22
22
20
20
21
23
23
23
28
28
Feels °C
26
25
25
16
18
19
21
21
20
22
22
20
21
18
17
19
23
21
21
28
28
  • 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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