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, 1AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,480 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 7PM (local time) - 3.5ft (1.1m), 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 7PM. The primary swell is predicted to be 1.1m and 16s period with a secondary swell of 1.2m 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 2.5m 16s and forecast to arrive on Sunday (Aug 23) at 1AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 8s period and expected on Monday (Aug 24) at 4PM.
| Wave Type | Time (+04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Mon 17th Aug) | 3.5ft (1.1m) 16s |
| Best Surf | 1AM (Sun 23rd Aug) | 8ft (2.5m) 16s |
| Most Powerful | 1AM (Sun 23rd Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Black Rocks Jetty over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s break down what’s coming for Black Rocks Jetty. We’ve got surf scattered right through the whole 16-day window, so don’t worry about a dry spell. There’s a bit of a slow start, but once it fires, it fires properly.
Monday, 17 August starts with a 4ft groundswell from the SW, with a very long 16-second period, but the cross-shore wind has it looking messy. The water’s sitting at 77°, which is a touch warmer than normal for this time of year. Energy is moderate at 1395, but not worth the effort. Tuesday and Wednesday drop off to under 3ft. Not much to say.
First real highlight comes Thursday morning, 20 August. The swell is small at 3ft, but it’s that clean SW groundswell with a 16-second period, and the wind goes glassy. It’s flat calm. The energy is weak at 371, but for a quiet, clean session you won’t get any trouble. Friday 21 August through Saturday 22 August sees the swell climb back to 4ft to 5ft from the SW, with 14-second periods and glassy conditions on Friday and Saturday mornings. The energy builds to moderate (603 to 737). This is where we start seeing some proper lines.
Now, the end of the first week gets serious. Sunday, 23 August, the swell jumps to 8ft from the SSW, with 14-second period. That’s strong energy at 2838, and it’s glassy in the morning. This is big surf – too big for beginners, strictly for the experienced. It holds through Monday and Tuesday with waves between 6ft and 7ft. Tuesday afternoon, 25 August, we see a spike: 7ft from the SSW with a very long 16-second period, and zero wind. Glassy perfection. The energy is strong at 2527. Wednesday morning, 26 August, keeps that energy with 8ft SSW groundswell and 15-second period (2581), but the afternoon gets choppy with cross-onshore wind.
The absolute standout of the whole run is Friday, 28 August. This is the one. We’ve got 10ft of SSW groundswell, 16-second period, and glassy conditions all morning. The combined energy is huge at 4136 – that’s very strong. This is big, powerful, long-period swell hitting a very consistent reef. Expert-only territory. The afternoon holds at 8ft with the same period and glassy winds (3374 energy). If you’ve got the skill, this is the session.
The weekend after stays solid – Saturday the 29th has 7ft to 6ft from the SSW, glassy, with strong energy (1490 to 1190). The following week sees the swell ease to 3ft to 4ft, still with lovely long periods from the SW and SSW. Light winds and plenty of clean windows through Monday, 1 September.
Black Rocks Jetty can get crowded when it’s good, so hit those mid-week glassy mornings to beat the pack.
To wrap it up: slow start, then building clean surf from Friday 21 August. The big SSW groundswell from Sunday 23 August through Wednesday 26 August is for experienced surfers only. The absolute standout is Friday, 28 August – that 10ft, 16-second groundswell with glassy winds is the session of the forecast. Don’t miss it.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon afternoon. Warm (max 24°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri afternoon. Warm (max 23°C on Thu 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 17 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 16 | SSW 14 | SSW 14 | SSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 701 | 611 | 374 | 278 | 214 | 152 | 149 | 152 | 113 | 302 | 169 | 302 | 590 | 590 | 621 | 733 | 690 | 3480 | 2838 | 2216 | 1520 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | on | cross-off | glassy | on | on | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | glassy | glassy | cross-off | cross-on |
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 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 24 | 23 | 23 | 24 | 23 | 22 | 23 | 23 | 22 | 23 | 22 | 22 | 23 | 22 | 22 | 23 | 23 | 22 | 23 | 23 | 22 |
Feels °C | 25 | 24 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 23 | 25 | 25 | 24 |
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 14 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 16 | SSW 14 | SSW 14 | SSW 13 |
| kJ | 694 | 572 | 374 | 278 | 214 | 152 | 149 | 152 | 112 | 302 | 169 | 302 | 590 | 590 | 621 | 733 | 690 | 3480 | 2838 | 2216 | 1520 |
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 17 | — | — | — | — |
| kJ | 701 | 611 | 301 | 255 | 169 | 127 | 114 | 118 | 113 | 69 | 46 | 215 | 20 | 35 | 35 | 33 | 563 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 10 | NE 10 | NE 10 | SW 17 | S 9 | S 9 | S 19 | S 17 | S 15 | NE 4 | — | — | — | — |
| kJ | — | 11 | 18 | 14 | 14 | 14 | 17 | 33 | 35 | 32 | 148 | 26 | 13 | 7 | 6 | 4 | 4 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 1 | 1 | 2 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
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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