
Surf Forecasts:
Dumps surf forecast from 11 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 10ft (3.0m), 15s period, WSW swell with 4,057 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 5AM (local time) - 4.5ft (1.4m), 14s period with SW swell.
Best Forecast Surf Conditions for Dumps this week:
The surf forecast for Dumps over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 5AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.9m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Dumps in the next 16 days are 3.0m 15s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Friday (Sep 11) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 12th Sep) | 4.5ft (1.4m) 14s |
| Best Surf | 2AM (Wed 16th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 11PM (Tue 15th Sep) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Dumps over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve had a look at what’s on the table for the next couple of weeks. We’ve only got one spot in the mix, and it’s a bit of a tricky character – Dumps, an inconsistent sandbar break that needs the right key to turn on. The forecast is a bit of a slow burn, but there’s definitely some serious potential hiding in there if you’re willing to wait and pick your moments.
The overall pattern shows a lot of clean but average-to-marginal energy early on, then a big spike of proper SW groundswell that really gets things moving from the weekend of the 12th. That’s where the standout windows are. The water temp here is sitting about average for the time of year, nothing too wild. Combined swell energy is solid, hitting four-digit figures when it matters, like 1647 and 3233.
Right, let’s start from the beginning. Friday the 11th is a bit of a warm-up. Morning sees a 6 ft WSW swell at 12 seconds, but it’s crossed-off at 16 mph from the SSE, and the energy is moderate (967). It’s surfable for the keen, but nothing to write home about. The afternoon drops off a touch.
Saturday the 12th is where the dial starts to move. The morning brings a cleaner 7 ft SW groundswell (15 secs) with moderate cross-off breeze. Wave energy is ramping up strong at 1647. Then comes the first true standout: Saturday afternoon at Dumps. You’ve got a solid 8 ft SW groundswell pushing in with a very long 16-second period, energy roaring at 3233, and the wind swings offshore from the SE at 12 mph. This is proper, heavy, expert-level surf. Long period groundswell like this at a sandbar can be a bit straight and shifty, but when it lines up, it’ll be powerful. The 8 ft size means it’s for experienced surfers only.
Sunday the 13th morning is another gem. A clean 7 ft SW groundswell (14 secs) with a light ESE offshore breeze at 6 mph. Energy is still strong at 1550. This is a more manageable size than Saturday afternoon but still punchy and clean. The afternoon turns cross-on and drops off in quality.
Monday the 14th through Tuesday the 15th is a write-off. Fresh cross-onshore winds from the NNW/NW at 19 mph combine with a couple of different swells, but the quality is poor. The energy is still there, but it’s lumpy and messy. Skip it.
Wednesday the 16th bounces back nicely. Clean cross-off winds from the SSE at 16 mph, with a 6 ft to 7 ft SW swell at 13-14 seconds. Energy is high (2686 and 2036). Conditions are clean, and while it’s not the absolute peak of the window, it’s very surfable for confident intermediates.
Thursday the 17th drops off a fair bit with smaller 4 ft swell, so not the day for it.
Now, Friday the 18th and Saturday the 19th are the second major standout period. Friday morning at Dumps looks excellent: a 7 ft SW groundswell (13 secs) with a light offshore from the ESE at 6 mph. Clean, solid, and strong energy (1505). The afternoon stays good with a gentle cross-off breeze. Saturday the 19th keeps the run going with a clean 6 ft SW swell (14 secs) and light cross-off winds in the morning. This is quality, consistent surf for experienced surfers.
Sunday the 20th and Monday the 21st are more marginal with moderate winds and dropping energy, but still surfable for the dedicated. Tuesday the 22nd is another blown-out day with strong breezes and poor conditions.
Wednesday the 23rd is small and clean but weak. Not worth the paddle.
Then we get a late burst. Thursday the 24th morning is the last true standout of the forecast. Dumps should see an excellent 7 ft SW groundswell (14 secs) with light cross-off winds from the SSE at 6 mph. Energy is back up to 1528. The wind is light, the swell is clean, and it’s a proper session for those in the know.
Friday the 25th continues to be good, with a clean 6 ft SW swell and light offshore winds in the morning. A solid close to the run.
Saturday the 26th looks like a return to poor conditions with a strong cross-on wind, so that’s likely the end of the action for this run.
Best on offer: Saturday the 12th afternoon, with that heavy 8 ft, 16-second SW groundswell and offshore wind. A true expert session, but powerful and demanding. For a more all-rounder standout that’s still heavy but a bit smaller, Friday the 18th morning is your pick – solid 7 ft, clean offshore, and long-period energy.
Right, that’s the long and short of it. Keep your eyes on the sky and your wax warm.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Warm (max 23°C on Sun afternoon, min 14°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Tue night. Very mild (max 17°C on Mon morning, min 12°C on Wed night). Winds decreasing (fresh winds from the N on Mon morning, calm by Tue night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | WSW 12 | WSW 12 | WSW 11 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | NNW 7 | NW 8 | NW 8 | NW 7 | SW 16 | WSW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 12 | SW 13 |
Wave Graph | |||||||||||||||||||||
967 | 710 | 393 | 1776 | 3233 | 2341 | 1550 | 1029 | 600 | 508 | 769 | 250 | 193 | 1271 | 3601 | 2815 | 1874 | 980 | 857 | 1969 | 1651 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:33PM1.89m | 3:51AM1.77m | 4:05PM1.88m | 4:23AM1.74m | 4:37PM1.83m | 4:54AM1.67m | 5:08PM1.74m | 5:25AM1.58m | 5:38PM1.62m | 5:57AM1.48m | 6:09PM1.50m | 6:32AM1.36m | 6:43PM1.36m | ||||||||
Low Tide | 9:22AM0.26m | 9:48PM0.24m | 9:53AM0.27m | 10:19PM0.26m | 10:23AM0.31m | 10:48PM0.33m | 10:52AM0.38m | 11:17PM0.41m | 11:21AM0.48m | 11:46PM0.52m | 11:50AM0.60m | 00:18AM0.63m | 12:24PM0.73m | 00:57AM0.74m | |||||||
6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | |
— | 6:34 | — | — | 6:35 | — | — | 6:35 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | |
mm | — | — | — | — | — | — | — | 1 | 6 | 1 | 1 | 4 | — | — | 7 | 1 | — | — | — | — | — |
Temp °C | 16 | 17 | 15 | 18 | 19 | 17 | 21 | 23 | 18 | 17 | 17 | 15 | 16 | 17 | 16 | 13 | 14 | 13 | 14 | 15 | 14 |
Feels °C | 13 | 13 | 11 | 15 | 16 | 15 | 21 | 22 | 20 | 11 | 11 | 12 | 11 | 11 | 14 | 10 | 8 | 7 | 9 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 11 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | WSW 7 | WSW 8 | WSW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 12 | SW 13 |
967 | 710 | 393 | 1776 | 3233 | 2341 | 1550 | 1029 | 600 | 380 | 268 | 245 | 99 | 488 | 3601 | 2815 | 1874 | 980 | 857 | 1969 | 1651 | |
Swell 2 Height (m) Direction Period (s) | — | — | SW 14 | — | — | — | SSE 8 | — | SSE 8 | SSE 9 | SSE 13 | SW 18 | SW 11 | SW 16 | SW 15 | WSW 13 | WSW 13 | WSW 12 | SW 15 | SW 15 | — |
— | — | 248 | — | — | — | 212 | — | 64 | 7 | 17 | 12 | 177 | 1271 | 370 | 642 | 929 | 598 | 631 | 360 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 10 | — | — | — | — | — | — | SE 13 | ESE 13 | SE 13 | SW 19 | ESE 13 | NW 7 | — | — | SSW 18 | W 12 | W 12 | — |
— | — | 33 | — | — | — | — | — | — | 7 | 18 | 7 | 170 | 17 | 44 | — | — | 32 | 411 | 139 | — | |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 8 | SE 8 | SSE 8 | NNW 4 | NNW 7 | NW 8 | NW 8 | NW 7 | NW 7 | — | — | — | — | SE 6 | SE 5 | SSE 6 |
432 | 686 | 462 | 407 | 522 | 412 | 711 | 379 | 52 | 508 | 769 | 250 | 193 | 151 | — | — | — | — | 1 | 74 | 160 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 9 | 397 | 4 | 9 | 0 | 0 | 0 | 9 | 7 | 177 | 78 | 27 | 184 | 226 | 0 | 10 | 397 | 0 | 82 | 336 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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Information about the Dumps Surf forecast
The above surf forecast table for Dumps provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Dumps can be found by selecting the local surf guide option on the grey menu. Our Dumps 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 (Dumps) 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 Dumps 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.
Are you planning a holiday in Cape Town? If you are looking for accommodation near Dumps, camping, hotels and holiday cottages in Cape Town, consider staying in Cape Town which is 6 km (4 miles) away. Other places in and around Cape Town where you can find information about places to rent, and car hire include Bellville which is 14 km (9 miles) away, Robben Island, Kayamnandi and Stellenbosch.










