Surf Forecasts:
Black Rocks Jetty surf forecast from 17 Aug 2026:
- Best quality surf: Sunday 23 Aug, 1AM (local time) - 8ft (2.5m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 4AM (local time) - 10ft (3.0m), 15s period, SSW swell with 3,503 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 1PM (local time) - 4ft (1.2m), 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 Monday (Aug 17) at 1PM. The primary swell is predicted to be 1.2m and 16s period with a secondary swell of 1.3m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Black Rocks Jetty in the next 16 days are 3.0m 15s and forecast to arrive on Sunday (Aug 23) at 4AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 10s period and expected on Friday (Aug 21) at 1PM.
| Wave Type | Time (+04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Mon 17th Aug) | 4ft (1.2m) 16s |
| Best Surf | 1AM (Sun 23rd Aug) | 8ft (2.5m) 16s |
| Most Powerful | 4AM (Sun 23rd Aug) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Black Rocks Jetty over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s talk about Black Rocks Jetty in feet and Fahrenheit. This is a very exposed reef break that’s always breaking, built for the experienced crew. The water’s sitting at about 77°—a touch warmer than usual for this time of year, which is a nice little surprise.
Monday morning, 17th August, starts with a small 4 ft SW swell, but it’s got a 16-second period and a light cross-shore wind. The energy is moderate at 1395, but the call is marginal. Not the best start. Monday afternoon gets worse with onshore wind. Tuesday morning, 18th, cleans right up with a light cross-offshore breeze and a 3 ft S swell at 12 seconds. Rideable and clean, but small.
Wednesday the 19th is even smaller at 3 ft, though Wednesday afternoon goes glassy. Still small.
Thursday the 20th and Friday the 21st start to build. Friday is the first real highlight—glassy conditions both morning and afternoon with a 4 ft SW swell, 14-second period, and clean energy. That’s fun surf starting to shape up.
First standout is Saturday, 22nd August. Glassy morning with a light breeze, 5 ft SW swell at 14 seconds, and energy jumping to 828. By the afternoon it’s still glassy, still 5 ft, and energy climbs to 956. Clean, solid waves—crowds are possible here, so get out early.
Sunday the 23rd is the expert’s day. Swell hits 8 ft SSW with a 14-second period, energy over 3000, and glassy conditions all day. This is a serious groundswell—the long period means waves are well-shaped on this reef but with longer lulls. Not for beginners.
Monday the 24th holds at 6 ft SSW, still glassy, excellent conditions. Tuesday the 25th stays clean with a cross-offshore breeze in the afternoon.
The big standout is Wednesday morning, 26th August. Swell is back to 8 ft SSW, 15-second period, glassy, with energy at 2729. That’s heavy, powerful reef surf for experts only. The afternoon turns a bit bumpy, so the morning is the call.
Thursday the 27th afternoon goes glassy again with a 5 ft SSW swell, 16-second period, and huge energy (2198). Sneaky good.
Then Friday, 28th August, is the biggest day—morning has 12 ft SSW swell, glassy, and energy over 4000. That’s for the elite only. Afternoon gets messy onshore.
The final days of August offer dropping swell. Sunday the 30th is small and glassy, Monday the 31st brings back a clean 5 ft SW swell with glassy conditions and solid energy. But by 1st September, it’s small and onshore.
No real gaps here—surf is on most days, but the best windows are Saturday 22nd for clean fun, and Wednesday 26th or Friday 28th for the big, serious stuff.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Warm (max 24°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Fri morning, min 22°C on Thu afternoon). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 16 | S 12 | SW 15 | S 12 | S 11 | S 11 | S 11 | SW 13 | SW 16 | SW 15 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 16 | SSW 14 | SSW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 701 | 611 | 374 | 278 | 214 | 152 | 149 | 152 | 113 | 302 | 209 | 302 | 590 | 598 | 821 | 828 | 780 | 3480 | 3071 | 2412 | 1623 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-off | cross-on | glassy | cross | glassy | cross-on | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy |
High Tide | 3:29PM0.49m | 3:36AM0.42m | 3:41PM0.46m | 3:58AM0.36m | 3:52PM0.42m | 4:22AM0.31m | 4:00PM0.39m | 1:32PM0.35m | 12:15PM0.37m | 10:29PM0.37m | 12:11PM0.40m | 11:00PM0.42m | |||||||||
Low Tide | 9:49PM0.20m | 9:35AM0.22m | 10:22PM0.22m | 9:28AM0.26m | 11:13PM0.25m | 8:12AM0.28m | 3:25AM0.25m | 4:43AM0.20m | 5:01PM0.31m | 5:08AM0.16m | 5:15PM0.27m | ||||||||||
 |  |  | |  | | | | | |  |  | | | | | | | | | | |
 | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — |
 | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | 2 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 24 | 22 | 22 | 23 | 23 | 22 | 23 | 22 | 22 |
Feels °C | 24 | 25 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 24 | 26 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 12 | S 12 | S 12 | S 11 | S 11 | S 11 | S 11 | SW 16 | SW 15 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 16 | SSW 14 | SSW 14 | SW 13 |
| kJ | 694 | 572 | 374 | 278 | 214 | 152 | 149 | 152 | 112 | 302 | 209 | 302 | 590 | 598 | 821 | 828 | 780 | 3480 | 3071 | 2412 | 1623 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | S 10 | S 10 | SW 13 | NE 8 | NE 10 | NE 10 | NE 10 | SSW 18 | — | — | — | NE 9 |
| kJ | 701 | 611 | 301 | 255 | 169 | 127 | 114 | 118 | 113 | 69 | 46 | 215 | 9 | 35 | 35 | 33 | 176 | — | — | — | 27 |
Swell 3 Height (m) Direction Period (s) | — | NE 5 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 5 | NE 10 | NE 10 | NE 9 | S 9 | S 9 | S 20 | — | — | NE 9 | — | — | — | — |
| kJ | — | 8 | 24 | 13 | 12 | 14 | 17 | 9 | 33 | 33 | 29 | 26 | 13 | 7 | — | — | 30 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Réunion Island | |||||||||||||||||||||
Best forecast wave conditions in Reunion | |||||||||||||||||||||
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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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