
Surf Forecasts:
J-Bay surf forecast from 7 Sep 2026:
- Best quality surf: Sunday 13 Sep, 8AM (local time) - 6.5ft (2.0m), 15s period, SW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 8PM (local time) - 7.5ft (2.3m), 16s period, SW swell with 2,443 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 2AM (local time) - 5ft (1.6m), 13s period with SW swell.
Best Forecast Surf Conditions for J-Bay this week:
The surf forecast for J-Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 2AM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 2.0m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at J-Bay in the next 16 days are 2.3m 16s and forecast to arrive on Thursday (Sep 10) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 9s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 8th Sep) | 5ft (1.6m) 13s |
| Best Surf | 8AM (Sun 13th Sep) | 6.5ft (2.0m) 15s |
| Most Powerful | 8PM (Thu 10th Sep) | 7.5ft (2.3m) 16s |
Table - best surf conditions forecast for J-Bay over the next 16 days.
The Lowdown
Righto, gather 'round. Rusty here with a look at what J-Bay has on the cards. The water's sitting at a chilly 59.7°F right now, which is a solid 6.1°F colder than it should be for this time of year. That's a big anomaly, so you'll want a good steamer if you're paddling out at Supertubes.
The next week and a half has a bit of everything, but you gotta pick your moments. The first couple of days are a write-off – Monday the 7th is a mess with cross-on winds and some serious energy in the water (3067), making for poor conditions. You can forget about it.
Things turn around proper on Tuesday the 8th. The morning is looking magic – glassy conditions, with a clean 4.3ft SW swell rolling in. The energy is still moderate (1122), but that offshore wind is what we live for. This is the standout of the first week. Keep in mind this is an intermediate-level break, and with the consistency here, you'll get your share. Crowds are sometimes an issue, so get in early.
Wednesday the 9th has a tiny 2.0ft groundswell with a very long 15-second period. It's gonna be super clean with that NW offshore, but small. That long period will make it a bit walled-off at the beach breaks, but at a reef/point like J-Bay, it could be special for the longboarders. The energy is weak (473).
Thursday the 10th sees the swell picking up a little, but it's messy. The afternoon has a 4.9ft SW swell with a super long 16-second period, making for a lot of energy (1642) but the forecast is marginal.
We get a bit of a lull with onshores and rain on Friday the 11th and Saturday the 12th. Not worth paddling out.
Then, Sunday the 13th morning brings it back. A 6.6ft SW groundswell with a 15-second period and light offshore winds. The energy is strong (2784). This is excellent for experienced surfers. The wave quality will be top-notch at Supertubes.
Monday the 14th morning also delivers with a clean 5.6ft SW swell. Good stuff.
Now, looking to the second week, about a week and a half out, we get a big pulse. On Wednesday the 16th, the swell jumps to a solid 14.8ft SW with a 17-second period. The energy is very, very strong (11241). This is for experts only. The wind looks clean, but that size will be a handful. Thursday the 17th is still big at 9.8ft but with onshore winds.
Friday the 18th is interesting. The morning is a junky 8.2ft ESE windswell, but the afternoon sees the wind swing offshore from the NW, cleaning up a 7.9ft ESE swell. That would be a wild session.
Sunday the 20th morning is another gem to circle: glassy, with a 6.6ft SW groundswell and a solid 14-second period. Energy is strong (2166). That would be clean and powerful.
Short Range ForecastMostly dry. Warm (max 34°C on Wed afternoon, min 15°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri afternoon. Warm (max 22°C on Sat afternoon, min 16°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the E by Fri night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 12 | SW 12 | E 9 | SW 14 | SW 13 | SW 13 | SW 16 | SW 14 | SW 13 | SW 13 | SW 12 | ESE 8 | SW 15 | ESE 9 | SW 15 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
2593 | 1758 | 854 | 591 | 367 | 232 | 171 | 410 | 326 | 424 | 1115 | 1929 | 1242 | 1018 | 570 | 574 | 1212 | 1302 | 1672 | 1423 | 1021 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | glassy | on | glassy | off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-off | cross | glassy |
High Tide | 1:25PM1.30m | 1:43AM1.38m | 2:11PM1.50m | 2:26AM1.51m | 2:48PM1.66m | 3:02AM1.61m | 3:22PM1.77m | 3:36AM1.66m | 3:54PM1.83m | 4:07AM1.67m | 4:24PM1.83m | 4:37AM1.64m | 4:53PM1.77m | ||||||||
Low Tide | 7:38PM0.40m | 7:58AM0.27m | 8:23PM0.24m | 8:36AM0.13m | 9:01PM0.11m | 9:09AM0.03m | 9:35PM0.03m | 9:41AM-0.02m | 10:07PM-0.00m | 10:10AM-0.03m | 10:36PM0.01m | 10:39AM0.02m | 11:04PM0.07m | ||||||||
6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 3 | 2 | — | — | — | — | — | — |
Temp °C | 20 | 24 | 22 | 26 | 26 | 23 | 32 | 34 | 22 | 20 | 19 | 18 | 18 | 17 | 17 | 20 | 22 | 19 | 22 | 24 | 22 |
Feels °C | 17 | 22 | 22 | 27 | 25 | 23 | 30 | 32 | 21 | 18 | 17 | 18 | 17 | 16 | 15 | 19 | 21 | 18 | 23 | 24 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | E 9 | E 9 | E 9 | E 9 | E 9 | SW 14 | SW 13 | SW 13 | SW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 15 | SSW 16 | E 9 | SW 14 | ESE 9 |
2593 | 1758 | 609 | 425 | 274 | 162 | 157 | 410 | 326 | 424 | 1115 | 1929 | 1242 | 1018 | 570 | 555 | 1212 | 1108 | 1112 | 1236 | 626 | |
Swell 2 Height (m) Direction Period (s) | SSE 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SSE 9 | E 9 | E 9 | SW 12 | E 10 | SSE 6 | SSE 6 | SSE 7 | — | S 14 | SW 13 | SW 15 | SW 14 | SW 13 |
59 | 736 | 854 | 591 | 367 | 232 | 145 | 29 | 133 | 110 | 407 | 102 | 23 | 60 | 131 | — | 4 | 572 | 1672 | 1423 | 1021 | |
Swell 3 Height (m) Direction Period (s) | — | SSE 12 | SSE 11 | SSE 10 | SSE 10 | SSE 11 | SW 15 | SSE 11 | SE 9 | SW 16 | E 10 | — | E 9 | — | — | — | SE 13 | — | — | — | — |
— | 50 | 158 | 106 | 77 | 47 | 171 | 13 | 22 | 264 | 120 | — | 40 | — | — | — | 7 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 7 | E 8 | E 9 | — | — | — | — | E 9 | W 4 | WSW 4 | SW 4 | SSW 4 | — | E 10 | ESE 7 | ESE 8 | ESE 7 | ESE 9 | — | E 9 | WSW 4 |
415 | 847 | 987 | — | — | — | — | 155 | 35 | 34 | 19 | 13 | — | 151 | 397 | 574 | 558 | 1302 | — | 961 | 7 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 172 | 140 | 0 | 0 | 60 | 0 | 0 | 60 | 3 | 3 | 3 | 0 | 172 | 180 | 140 | 141 | 140 | 140 | 0 | 3 | 0 |
Best forecast wave conditions in Eastern Cape (South) | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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Information about the J-Bay Surf forecast
The above surf forecast table for J-Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at J-Bay can be found by selecting the local surf guide option on the grey menu. Our J-Bay 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 (J-Bay) 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 J-Bay 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.
J-Bay is 19 km (12 miles) from the city of Kruisfontein. If you plan a holiday in Eastern Cape (South), look for hotels and other accommodation in Kruisfontein. Kruisfontein has rooms for a wide range of budgets as well as car hire and transport links.










