Surf Forecasts:
Black Rocks Jetty surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 29 Aug, 1AM (local time) - 15ft (4.5m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 7PM (local time) - 15ft (4.5m), 17s period, SSW swell with 13,046 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 4AM (local time) - 4.5ft (1.4m), 14s 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 Saturday (Aug 22) at 4AM. The primary swell is predicted to be 1.4m and 14s period. 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 4.5m 17s and forecast to arrive on Friday (Aug 28) at 7PM. 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 1PM.
| Wave Type | Time (+04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sat 22nd Aug) | 4.5ft (1.4m) 14s |
| Best Surf | 1AM (Sat 29th Aug) | 15ft (4.5m) 17s |
| Most Powerful | 7PM (Fri 28th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Black Rocks Jetty over the next 16 days.
The Lowdown
Alright, mates, Rusty here. Let’s get into it. The next couple of weeks have some serious potential, but it’s a bit of a slow burn at first. We’ve got a solid swell window coming up, so let’s break it down day by day.
The opening act kicks off on Friday afternoon, the 21st. It’s not huge, but it’s clean. We’re looking at head-high sets around 4ft from the SW with a 14-second period. The water’s a touch warmer than normal, almost 3°F warmer than the long-term average, so it’s a little treat. Winds are glassy, almost nothing. It’s a good sign of things to come.
Saturday the 22nd, the swell pushes up a notch to 5ft, and the wind stays glassy. Saturday arvo, the wind drops to nothing at all, totally calm and the waves are still pumping. It’s not the biggest, but the quality is there.
Then we hit the first real standout. Sunday the 23rd. The swell jumps to 8ft, still SW, with a 14-second period. The energy is building strong. Glassy conditions in the morning. This is where it starts getting serious. Monday the 24th is the pick of the first week. 8ft of clean SSW groundswell, period up to 15 seconds, and it’s pure glass all day. This is the kind of day you call in sick for. It’s proper, powerful, and clean.
Tuesday the 25th settles a bit, but 6ft of SSW with clean winds is still a great day. We’ve got a little run of good surf through Wednesday the 26th, though it drops to around 4ft. But look at that Wednesday afternoon – a 17-second period is a real long-period groundswell. That’s a sign of something bigger on the horizon, even if the size is small.
Now, hold on to your board shorts, because Thursday the 27th is where things get raw. The swell jumps back up hard, 8ft in the morning, but the wind swings onshore. By the afternoon, it’s 10ft and getting chopped up. It’s big, but it’s messy.
That sets the stage for the biggest days of the entire forecast. Friday the 28th. This is the one to circle. The swell explodes to 13ft and then almost 15ft on Friday arvo, with a brutal 17-second period. The energy readings are off the charts. That’s serious, very strong energy. The wind is cross-shore, which is not ideal, but with that much power, if you’re an expert, this is the session. It’s big, it’s mean, and it’s powerful.
Saturday the 29th, the swell is still massive, 13ft in the morning, but the wind comes right around to the WNW and goes glassy. This is the second standout. Clean, massive, and all for the experts. This is as good as it gets.
After that, the swell backs off through the 30th and 31st, back to the 8ft range and then down to 4ft. Clean, fun, but a step down from the monster days.
Then we hit a bit of a flat patch. From the 1st to the 3rd of September, it’s small. We’re looking at 3ft down to 2ft, weak energy. It’s surfable for a longboard on the right tide, but honestly, it’s pretty ordinary. This is the lull.
The last chance for a pulse comes on September the 4th. The swell jumps back up to 7ft, but the wind is all over the place, cross-shore, and then cross-on shore. It’s a bit of a mess. Then by the 5th, it drops off again to a clean 5ft, but the vibe is winding down.
So, there you have it. The standout days are clearly Friday the 28th and Saturday the 29th. That’s when the big, long-period groundswell hits with real power. Bring your big board and your nerve. The rest is a story of a slow build, a big peak, and then a fade into the ordinary.
Signing off from the beach,
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 23°C on Sat morning, min 21°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Wed morning, min 21°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SW 12 | SW 12 | SSW 18 | SSW 16 | SSW 18 | SSW 17 | SSW 18 |
Wave Graph | |||||||||||||||||||
686 | 885 | 846 | 1042 | 2155 | 1895 | 1367 | 2206 | 2038 | 1427 | 1083 | 871 | 428 | 232 | 534 | 1677 | 3918 | 4583 | 7222 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-on | cross-on | glassy |
High Tide | 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 | 1:02PM0.53m | 00:43AM0.58m | |||||||
Low Tide | 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 | 6:43AM0.04m | 6:48PM0.15m | |||||||
— | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | |
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 23 | 22 | 23 | 22 | 22 | 23 | 22 | 22 | 23 | 23 | 23 | 24 | 23 | 22 | 24 | 24 | 22 |
Feels °C | 24 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SW 12 | SW 12 | SSW 18 | SSW 16 | SSW 18 | SSW 17 | SSW 18 |
686 | 885 | 846 | 1042 | 2155 | 1895 | 1367 | 2206 | 2038 | 1427 | 1083 | 871 | 428 | 232 | 534 | 1677 | 3918 | 4583 | 7222 | |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 10 | SSW 18 | SSW 16 | — | — | SSW 18 | SW 13 | — | S 15 | NE 8 | NE 5 | S 12 | S 11 | SW 11 | S 11 | SSE 10 | — | — |
20 | 33 | 204 | 808 | — | — | 438 | 246 | — | 115 | 11 | 11 | 178 | 205 | 217 | 84 | 35 | — | — | |
Swell 3 Height (m) Direction Period (s) | NE 10 | S 14 | NE 10 | NE 9 | — | — | NE 9 | — | — | — | S 16 | — | NE 7 | SW 19 | S 11 | NE 8 | NE 9 | — | — |
4 | 16 | 32 | 20 | — | — | 12 | — | — | — | 45 | — | 12 | 181 | 195 | 20 | 26 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 |
Best forecast wave conditions in Réunion Island | |||||||||||||||||||
Best forecast wave conditions in Reunion | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











