Surf Forecasts:
Bonza Bay surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8PM (local time) - 7.5ft (2.3m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 8PM (local time) - 7.5ft (2.3m), 14s period, SSW swell with 1,984 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 7.5ft (2.3m), 14s period with SSW swell.
Best Forecast Surf Conditions for Bonza Bay this week:
The surf forecast for Bonza Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8PM. The primary swell is predicted to be 2.3m and 14s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bonza Bay in the next 16 days are 2.3m 14s and forecast to arrive on Thursday (Aug 20) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Thursday (Aug 27) at 2AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 7.5ft (2.3m) 14s |
| Best Surf | 8PM (Thu 20th Aug) | 7.5ft (2.3m) 14s |
| Most Powerful | 8PM (Thu 20th Aug) | 7.5ft (2.3m) 14s |
Table - best surf conditions forecast for Bonza Bay over the next 16 days.
The Lowdown
G'day, Rusty here. Let's get into it for Bonza Bay.
It's a bit of a slow start to the outlook, with the first week or so looking pretty average for a solid paddle. The water temp is a touch cooler than usual for this time of year, sitting at 65°, which is a bit colder than normal. The swell energy is generally weak to moderate, with values in the low hundreds to low thousands (2350), but poor wind conditions and choppy surf are the main story for most of the first week.
Thursday afternoon the 20th sees a solid 8ft SSW swell with a 14-second period, but the wind is a cross-on from the south at 9 mph, making it a messy, choppy affair. It's a big, powerful swell with strong energy (2350), but it's just not clean enough for a good session. The rest of that week is a write-off with small, weak, or wind-affected surf.
The first real standout appears on Tuesday morning the 25th. We've got a clean 5ft SSW groundswell with a very long 15-second period and a light offshore wind from the NW at 3 mph. This is a classic setup for a river mouth like Bonza Bay. The swell energy is moderate (1060), but the long period means the waves will have real shape and power, and the clean conditions will make it a joy. Expect some long lines and good barrels for the experienced crew.
After that, a bit of a lull with mostly cross-shore winds and small, weak surf until Thursday morning the 27th. That morning offers a glassy 3ft S swell with a 12-second period, and the wind is dead calm (glass). The swell energy is low (502), but the conditions are perfect for a fun, clean session on a smaller board.
Friday morning the 28th also looks promising with a 3ft S swell, an 11-second period, and a clean offshore wind from the NW at 12 mph. The swell energy is low (213), but it's clean and should offer some fun, rippable waves.
Looking further ahead, the standout for the entire outlook is the massive swell during the first week of September. On Thursday morning the 3rd, we're looking at a colossal 20ft SSW swell with a 16-second period. The wind is light and cross-on, but the real issue is the size. This is a beast, with very strong energy (22640), and it's simply too big for Bonza Bay. The system is predicting it will be too big for this break, so only the most experienced, heavily equipped chargers would even consider it. It's a monster, but it's not a practical option for most.
The following days, Friday the 4th, see a drop in size to a more manageable 7ft S swell with a 12-second period, but the wind is a cross-shore, so it's a marginal call.
Overall, the best bet for a clean, quality session is Tuesday morning the 25th, with the long-period groundswell and offshore winds. The glassy Thursday morning the 27th is a close second for a smaller, more relaxed session. The big swell in early September is a spectacle, but not a practical surf.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sat morning, min 15°C on Fri night). Winds increasing (calm on Thu night, strong winds from the SW by Sat afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed morning, min 14°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 13 | SSW 12 | SSW 12 | S 12 | S 11 | SSW 7 | SW 10 | SSW 10 | S 11 | S 11 | S 9 | SSW 12 | S 16 | SSW 15 | SSW 14 | SSW 14 | S 16 | S 12 | S 12 |
Wave Graph | ||||||||||||||||||||
2329 | 1073 | 598 | 494 | 404 | 265 | 542 | 1255 | 492 | 535 | 388 | 127 | 125 | 496 | 1049 | 838 | 704 | 815 | 344 | 285 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | cross-on | cross | cross-off | cross | cross-off | cross | on | cross-off | cross | cross | cross-off | off | cross-on | cross | cross | cross | cross-off |
High Tide | 8:23PM1.45m | 9:02AM1.30m | 10:17PM1.34m | 12:22PM1.30m | 00:43AM1.39m | 1:40PM1.43m | 1:43AM1.50m | 2:17PM1.58m | 2:20AM1.63m | 2:46PM1.72m | 2:50AM1.74m | 3:12PM1.84m | 3:18AM1.85m | |||||||
Low Tide | 2:50AM1.00m | 3:07PM1.05m | 5:23AM1.04m | 6:17PM1.07m | 7:15AM0.93m | 7:39PM0.95m | 7:59AM0.79m | 8:18PM0.81m | 8:30AM0.65m | 8:48PM0.68m | 8:58AM0.53m | 9:16PM0.55m | ||||||||
— | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | |
5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 18 | 18 | 18 | 21 | 21 | 17 | 18 | 18 | 16 | 19 | 19 | 16 | 18 | 19 | 17 | 22 | 23 | 26 |
Feels °C | 15 | 17 | 18 | 17 | 17 | 15 | 13 | 11 | 16 | 15 | 15 | 17 | 15 | 13 | 17 | 17 | 15 | 18 | 20 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 11 | S 14 | SSW 10 | SSW 10 | S 11 | S 11 | S 9 | S 7 | S 16 | SSW 15 | SSW 14 | SSW 14 | S 16 | S 12 | ENE 8 |
2329 | 1073 | 598 | 494 | 404 | 265 | 394 | 702 | 492 | 535 | 388 | 127 | 48 | 496 | 1049 | 838 | 704 | 815 | 344 | 300 | |
Swell 2 Height (m) Direction Period (s) | E 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 7 | ENE 7 | E 8 | ENE 8 | E 8 | E 9 | SSW 14 | SSW 12 | SSW 5 | E 9 | E 9 | E 9 | SE 12 | S 16 | S 12 |
21 | 22 | 12 | 12 | 12 | 77 | 18 | 5 | 6 | 5 | 6 | 71 | 125 | 30 | 6 | 6 | 2 | 5 | 178 | 285 | |
Swell 3 Height (m) Direction Period (s) | — | — | NE 7 | — | — | S 15 | — | — | E 9 | — | S 12 | SSE 11 | E 10 | E 10 | SE 12 | SE 11 | ENE 10 | SE 12 | WSW 13 | S 16 |
— | — | 2 | — | — | 157 | — | — | 2 | — | 3 | 12 | 7 | 7 | 5 | 5 | 9 | 5 | 69 | 251 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 4 | SW 3 | SSW 7 | SW 10 | — | — | — | — | SSW 3 | SW 5 | — | — | NE 2 | ENE 4 | ENE 6 | ENE 8 |
— | — | — | — | 7 | 4 | 542 | 1255 | — | — | — | — | 7 | 58 | — | — | 1 | 39 | 237 | 575 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 52 | 0 | 18 | 455 | 204 | 129 | 435 | 134 | 0 | 239 | 0 | 0 | 52 | 4 | 0 | 492 | 204 | 249 | 249 | 0 |
Best forecast wave conditions in Eastern Cape - Wild Coast | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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Information about the Bonza Bay Surf forecast
The above surf forecast table for Bonza Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Bonza Bay can be found by selecting the local surf guide option on the grey menu. Our Bonza 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 (Bonza 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 Bonza 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.
Bonza Bay is 7 km (4 miles) from the city of East London. If you plan a holiday in Eastern Cape - Wild Coast, look for hotels and other accommodation in East London. East London has rooms for a wide range of budgets as well as car hire and transport links.











