Black Rocks Jetty Surf Break

Lat Long: 21.04° S 55.23° E

Black Rocks Jetty Surf Forecast and Surf Report

Issued: 9 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Black Rocks Jetty sea temperature is
24.9° C
1.9° 

Black Rocks Jetty surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Black Rocks Jetty surf forecast from 20 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 10PM (local time) - 5.5ft (1.7m), 13s period, SW swell with glassy winds.
  • Most powerful swell: Friday 28 Aug, 4AM (local time) - 13ft (4.0m), 17s period, SSW swell with 9,301 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.8m), 16s period with SW swell.

Best Forecast Surf Conditions for Black Rocks Jetty this week:

The surf forecast for Black Rocks Jetty over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 1AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.6m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Black Rocks Jetty in the next 16 days are 4.0m 17s and forecast to arrive on Friday (Aug 28) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 10s period and expected on Saturday (Aug 22) at 10AM.

Wave TypeTime (+04) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Fri 21st Aug)2.5ft (0.8m) 16s
Best Surf10PM (Sat 22nd Aug)5.5ft (1.7m) 13s
Most Powerful 4AM (Fri 28th Aug)13ft (4.0m) 17s

Table - best surf conditions forecast for Black Rocks Jetty over the next 16 days.


The Lowdown

Alright, Rusty here. Let’s get into it.

We’ve got a solid run of surf ahead starting this Thursday afternoon, August 20th, and it keeps building. The early action is worth keeping an eye on, but the real standouts are later in the run.

Kicking off Thursday afternoon at Black Rocks Jetty, the water’s already a touch warmer than what’s typical for this time of year, sitting at 77°. Swell is small at 2 feet from the southwest with a long 15-second period. The wind is totally glassed out, so you’re looking at clean, tidy conditions, even if the size is modest. Combined swell energy is weak (289), so it’s more about the smooth surface than power.

Friday morning the 21st, the swell picks up to 4 feet, still a long 14-second period out of the southwest, and the wind stays glassy. That’s clean, fun-sized surf. The wave energy climbs to moderate (611), so there’s a bit more push. Friday afternoon the wind turns cross-on, so the morning is definitely the call.

Saturday the 22nd looks excellent. Morning comes in at 5 feet from the southwest with glassy winds, and the combined energy jumps to moderate-high (901). The afternoon actually hits a 4/10 scoring threshold: 5 feet again, period 13 seconds, glassy conditions, and energy up to 1055. Those are clean, well-shaped waves for intermediate and above.

Sunday morning the 23rd is where things get serious for stronger surfers. The swell is 8 feet from the southwest, a 14-second period, with glassy northwest wind. Combined energy is strong (2155). That’s proper groundswell, powerful, and with those long-period gaps between sets, paddling out is a little easier despite the size. This is pushing the upper end of what’s comfortable for most.

Monday the 24th holds similar size at 7 to 8 feet from the south-southwest, with glassy mornings and clean afternoons. Ideal conditions for experienced surfers.

Tuesday the 25th sees a drop back to 6 feet in the morning and 5 feet in the afternoon, both with glassy winds. Very good, clean surf.

Then Wednesday the 26th gets a bit messy. The morning is onshore, and the afternoon brings a 12 mph southerly cross-on with choppy conditions. That’s a skip.

Now here’s the standout: Thursday morning, August 27th, the swell hits 8 feet from the south-southwest with a 16-second period. The wind is cross-off at 6 mph, so it’s clean. Wave energy is very strong (3290). By the afternoon, energy jumps even higher to 4913. This is excellent for experts.

Friday, August 28th is the best on offer. Morning comes in at a solid 13 feet from the south-southwest, a 17-second period, and glassy conditions. The combined energy (9364) is exceptional. This is a serious groundswell, powerful and very long-period. That volume of energy is rare. The afternoon stays 13 feet but with a light cross-on breeze, so the morning is the pinnacle.

Saturday the 29th backs off a bit to 10 feet in the morning and 8 feet in the afternoon, still glassy and strong. Sunday the 30th starts dropping further. The run from August 31st into early September has smaller swell, mostly under 4 feet, with mixed wind and a lot of marginal conditions. There’s a nice little spike on September 3rd morning with 3 feet and a 16-second period, glassy winds, and moderate energy (586), but by then, the big stuff is long gone.

To sum it up: the pick of the entire 16-day window is Friday morning, August 28th, at Black Rocks Jetty. That 13-foot southwest groundswell with a 17-second period and glassy wind is as good as it gets for experts. Next best is Thursday the 27th with 8 feet, clean cross-off wind, and very strong energy. Everything before that from the 20th to the 26th offers some nice clean, smaller days, but the real fireworks are in the final week of August.

Stay safe out there. This is big, powerful water.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Fri night. Warm (max 23°C on Fri morning, min 21°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Wed morning, min 21°C on Sun night). Wind will be generally light.

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
3
3
3
4
4
4
4
4
4
4
3
2
3
3
4
3
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
SW
16
1.2
SW
14
1.2
SW
14
1.3
SW
14
1.6
SW
14
1.6
SW
13
1.7
SW
13
2.3
SW
14
2.2
SW
14
1.9
SW
14
2.3
SSW
15
2.3
SSW
14
1.9
SSW
13
1.7
SSW
13
1.4
SW
13
1.5
SW
12
1.4
SW
11
1.1
SW
17
2.2
SW
15
Wave Graph
Metric surfscale
Energy kJ
344
598
590
686
885
846
1042
2155
1895
1387
2355
1889
1264
928
647
635
506
671
2037
Wind (km/h)
5
NNW
5
WNW
10
SSW
0
E
0
WNW
5
SSW
0
SSE
5
NW
5
N
5
E
0
NNW
5
NNW
5
NE
5
WSW
10
SSW
0
S
5
NNW
0
NW
5
S
Wind State
glassy
cross
on
glassy
glassy
on
glassy
glassy
cross-off
glassy
glassy
glassy
glassy
glassy
on
glassy
cross-off
glassy
cross-on
High Tide
1:32PM0.35m
12:15PM0.37m
10:29PM0.37m
12:11PM0.40m
11:00PM0.42m
12:17PM0.43m
11:26PM0.46m
12:28PM0.46m
11:51PM0.51m
12:44PM0.50m
00:16AM0.55m
Low Tide
3:25AM0.25m
4:43AM0.20m
5:01PM0.31m
5:08AM0.16m
5:15PM0.27m
5:32AM0.12m
5:36PM0.23m
5:55AM0.08m
5:59PM0.20m
6:19AM0.05m
6:23PM0.17m
clear
clear
part cloud
rain showers
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:37
6:35
6:35
6:33
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:07
6:07
6:07
6:07
6:07
 mm
1
Temp °C
22
23
23
22
23
23
22
23
22
22
23
23
22
23
23
22
24
23
22
Feels °C
24
24
24
24
25
25
24
25
23
23
25
25
24
24
24
24
26
26
24
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  • 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 Black Rocks Jetty Surf forecast

The above surf forecast table for Black Rocks Jetty provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Black Rocks Jetty can be found by selecting the local surf guide option on the grey menu. Our Black Rocks Jetty 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 (Black Rocks Jetty) 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 Black Rocks Jetty 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.

Black Rocks Jetty is 6 km (4 miles) from Saint-Paul. If you plan a holiday in Réunion Island, look for hotels and other accommodation in Saint-Paul. Saint-Paul has rooms for a wide range of budgets as well as car hire and transport links.

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