Surf Forecasts:
Magna Tubes surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8AM (local time) - 11ft (3.5m), 12s period, SW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 11AM (local time) - 13ft (4.0m), 13s period, SW swell with 5,528 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 8PM (local time) - 3ft (0.9m), 11s period with E swell.
Best Forecast Surf Conditions for Magna Tubes this week:
The surf forecast for Magna Tubes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 8PM. The primary swell is predicted to be 0.9m and 11s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Magna Tubes in the next 16 days are 4.0m 13s and forecast to arrive on Thursday (Aug 20) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Thursday (Aug 20) at 5AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 17th Aug) | 3ft (0.9m) 11s |
| Best Surf | 8AM (Thu 20th Aug) | 11ft (3.5m) 12s |
| Most Powerful | 11AM (Thu 20th Aug) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Magna Tubes over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
We’ve got a solid run of swell on the way for Magna Tubes, but this one is strictly for the experienced crew. That reef setup is exposed and it’s going to pump hard. The water is sitting at 53.1°F – that’s a massive 12.9°F colder than usual for this time of year, so you’ll want a thick steamer and booties. It’s not just a little chilly; it’s properly freezing.
The stand-out window kicks off on Monday, August 17th with a morning pulse of 7.5ft SW swell at 14 seconds, but it’s a bit messy with a cross wind. The real action starts building. Tuesday, August 18th afternoon is where it gets interesting: 8.2ft of SW groundswell, 13-second period, with light cross-offshore winds. Clean, powerful, and for the confident surfer only. The combined energy is strong at 2304.
But the absolute best of the run is Thursday, August 20th morning. That’s the standout. We’re looking at a solid 13.1ft SW swell, 13-second period, with light offshore wind. The energy is huge at 6020. This is exceptional, expert-only territory. If you’re skilled and can handle big, heavy reef waves, this is your moment. Expect crowds to be possible given the quality.
The swell stays chunky through the rest of the week, with good cleanup on Monday, August 24th morning – 7.2ft SSW, glassy conditions, and another excellent session for experienced surfers. The energy is moderate at 1230, but that glassy wind makes it pure.
Into the second week, things stay active but the wind becomes a factor. Monday, August 31st sees another massive pulse of 13.1ft SSW swell with long 14-second periods, but the wind is moderate cross-offshore. The energy is through the roof at 7034. This is a big, powerful, expert-only window, but it’s a bit less clean than the earlier peak. Still, for the big wave crew, it’s a serious option.
Towards the end of the run, Friday, August 28th morning offers a glassy 6.2ft SW swell – a smaller, cleaner, more manageable window for the advanced surfer who wants a break from the giant stuff.
Overall, this is a heavy, cold-water reef campaign. The 20th of August is the one to circle. It’s not for the faint-hearted, and the crowds will know it’s on.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon afternoon, min 12°C on Tue night). Winds increasing (calm on Tue night, fresh winds from the W by Wed night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Thu night). Winds increasing (calm on Fri morning, fresh winds from the WSW by Sat afternoon). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | E 11 | E 11 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SW 12 | SW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 185 | 143 | 1589 | 2235 | 3018 | 2369 | 2257 | 2690 | 5528 | 4586 | 2683 | 1713 | 787 | 821 | 1284 | 2436 | 2963 | 2039 | 1702 | 1132 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross | glassy | cross-off | cross-off | cross-off | cross-on | cross | glassy | cross | off | cross-off | cross-off | off | glassy | cross-on | glassy |
High Tide | 6:29PM1.54m | 6:39AM1.33m | 6:59PM1.39m | 7:09AM1.19m | 7:31PM1.24m | 7:46AM1.06m | 8:17PM1.09m | 9:08AM0.94m | 10:35PM1.00m | 12:36PM0.96m | 00:52AM1.07m | 1:40PM1.10m | 1:44AM1.20m | |||||||
Low Tide | 00:40AM0.32m | 12:39PM0.33m | 1:12AM0.45m | 1:09PM0.48m | 1:49AM0.58m | 1:47PM0.62m | 2:53AM0.70m | 3:08PM0.75m | 5:54AM0.72m | 6:33PM0.74m | 7:28AM0.60m | 7:41PM0.62m | ||||||||
 |  | | | |  | |  | | | | | | | | | | | | | |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — |
 | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 15 | 16 | 17 | 15 | 17 | 18 | 15 | 16 | 16 | 14 | 16 | 17 | 14 | 16 | 18 | 15 | 18 | 17 | 14 |
Feels °C | 15 | 13 | 14 | 13 | 15 | 17 | 16 | 11 | 12 | 12 | 13 | 15 | 15 | 12 | 11 | 11 | 12 | 18 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | E 9 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SW 12 | SW 11 |
| kJ | 1915 | 1599 | 1589 | 2235 | 3018 | 2369 | 2257 | 25 | 5528 | 4586 | 2683 | 1713 | 787 | 821 | 1284 | 2436 | 2963 | 2039 | 1702 | 1132 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 10 | E 10 | E 10 | E 9 | E 9 | — | E 8 | E 8 | E 8 | E 9 | WSW 11 | WSW 11 | WSW 11 | — | — | — | — | E 10 |
| kJ | 185 | 143 | 100 | 69 | 46 | 44 | 27 | — | 23 | 13 | 6 | 6 | 563 | 275 | 186 | — | — | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | E 8 | E 8 | E 8 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 5 | 5 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SW 4 | SW 12 | — | — | — | — | — | — | WSW 4 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 13 | 2690 | — | — | — | — | — | — | 26 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 51 | 0 | 141 | 141 | 1 | 1 | 51 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
Best forecast wave conditions in Eastern Cape (South) | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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Information about the Magna Tubes Surf forecast
The above surf forecast table for Magna Tubes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Magna Tubes can be found by selecting the local surf guide option on the grey menu. Our Magna Tubes 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 (Magna Tubes) 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 Magna Tubes 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.
Magna Tubes 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.
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