Surf Forecasts:
Dumps surf forecast from 4 Sep 2026:
- Best quality surf: Saturday 5 Sep, 11PM (local time) - 4.5ft (1.3m), 22s period, SW swell with offshore winds.
- Most powerful swell: Sunday 6 Sep, 5AM (local time) - 7ft (2.1m), 20s period, SW swell with 3,370 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 11PM (local time) - 1.5ft (0.5m), 11s period with WSW 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 Friday (Sep 04) at 11PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.3m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Dumps in the next 16 days are 2.1m 20s and forecast to arrive on Sunday (Sep 06) at 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Friday (Sep 04) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 4th Sep) | 1.5ft (0.5m) 11s |
| Best Surf | 11PM (Sat 5th Sep) | 4.5ft (1.3m) 22s |
| Most Powerful | 5AM (Sun 6th Sep) | 7ft (2.1m) 20s |
Table - best surf conditions forecast for Dumps over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it.
The only spot on the menu is Dumps, a sandbar that’s known for being inconsistent – it needs a real push to light up. The water’s sitting at 56°, which is about four degrees colder than average for this time of year – feels like winter just won't quit. But there's some proper swell coming.
We kick off with a dud. Friday afternoon is a write-off with a cross-off wind at 25 mph tearing up a tiny 2 ft West-South-West swell (108 energy). Saturday morning is clean with a 12 mph offshore, but the 2 ft South-South-West swell is ordinary (159 energy). That afternoon the period spikes to 25 seconds on a tiny 1 ft swell – long lines that might just straighten out on the sandbar (340 energy). Not the best.
Sunday morning lights up. Swell jumps to 8 ft from the South-West at 18 seconds – that’s a solid groundswell with massive energy (3122). A gentle 9 mph offshore wind keeps it clean. This is expert territory, well over 8 ft, but for the crew that can handle it, it’s the best early call. The afternoon settles to 7 ft (1978 energy) but swings cross-off.
Monday goes onshore and ugly. Tuesday morning turns glassy with a light breeze and a 4 ft SSW swell (472 energy) – a nice window for a small-wave board.
After a mid-week lull, Thursday morning the 10th brings back a clean 4 ft South-West swell (1328 energy) with a good cross-off breeze. The afternoon picks up wind but stays clean.
The real standout is Saturday the 12th. Morning is glassy with a 10 ft South-West swell at 17 seconds – that’s a monster, 5728 energy. Expert-only. By the afternoon it hits 12 ft (5418 energy) – the file says it’s too big for this break, so keep that in mind.
The second week stays big but windy. Friday the 18th looks promising with a 10 ft South-West swell and light offshore winds (2846 energy) – excellent for experienced surfers. Then a stormy finish on the 19th with rain and 19 mph cross-onshore winds kills it.
Bottom line: Sunday morning the 6th for big, clean groundswell, and Saturday morning the 12th for an even bigger, glassy session – both only for experts. If you’re intermediate, hit Tuesday morning the 8th for the glassy smaller stuff.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sun afternoon, min 10°C on Sat morning). Winds decreasing (strong winds from the SE on Fri afternoon, calm by Sun night). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 11 | WSW 11 | SSW 10 | SW 25 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SSW 11 | WSW 12 | SW 11 | WSW 13 | WSW 13 | WSW 12 | SW 15 | SW 14 | WSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 93 | 101 | 92 | 162 | 2460 | 3122 | 1978 | 1441 | 1471 | 1155 | 452 | 280 | 140 | 172 | 304 | 281 | 458 | 743 | 1387 | 1207 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | cross-off | off | on | cross | glassy | glassy | cross-off | glassy | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:36PM1.38m | 9:45AM1.27m | 10:31PM1.33m | 11:38AM1.35m | 00:11AM1.41m | 12:50PM1.50m | 1:14AM1.53m | 1:40PM1.65m | 2:01AM1.64m | 2:21PM1.78m | 2:41AM1.72m | 2:58PM1.86m | 3:17AM1.77m | |||||||
Low Tide | 2:06PM0.74m | 3:24AM0.73m | 4:12PM0.79m | 5:18AM0.70m | 6:02PM0.70m | 6:35AM0.59m | 7:09PM0.55m | 7:28AM0.47m | 7:57PM0.41m | 8:11AM0.37m | 8:38PM0.31m | 8:48AM0.30m | 9:14PM0.25m | |||||||
 |  | | | | | | | | | | | | | | | |  |  |  | |
 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — |
 | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:32 | — | — | 6:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 14 | 16 | 21 | 17 | 19 | 25 | 23 | 25 | 25 | 21 | 21 | 24 | 18 | 20 | 19 | 16 | 17 | 18 | 14 |
Feels °C | 9 | 8 | 12 | 17 | 13 | 17 | 24 | 22 | 23 | 24 | 21 | 21 | 23 | 18 | 20 | 17 | 16 | 15 | 15 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 11 | WSW 11 | SSW 10 | SSW 10 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SSW 11 | SW 11 | SW 11 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 14 | WSW 13 |
| kJ | 93 | 101 | 92 | 140 | 2460 | 3122 | 1978 | 1441 | 1471 | 1155 | 452 | 280 | 121 | 172 | 304 | 281 | 458 | 585 | 1387 | 1207 |
Swell 2 Height (m) Direction Period (s) | S 14 | SSW 13 | WSW 10 | WSW 10 | SW 12 | SSE 8 | — | SSE 8 | SSE 6 | SE 8 | WSW 12 | WSW 12 | WSW 12 | WSW 14 | SSE 9 | SSE 9 | SSE 8 | SW 15 | WSW 10 | SW 14 |
| kJ | 15 | 56 | 67 | 38 | 39 | 249 | — | 78 | 16 | 43 | 355 | 150 | 140 | 138 | 26 | 7 | 7 | 743 | 275 | 407 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 25 | SW 10 | — | — | — | SSE 14 | SSE 13 | SW 18 | SW 16 | S 10 | SSE 9 | W 11 | S 8 | SE 12 | SSE 11 | — | W 12 |
| kJ | — | — | — | 162 | 24 | — | — | — | 18 | 17 | 13 | 42 | 73 | 28 | 21 | 5 | 6 | 12 | — | 26 |
Wind waves Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SSE 9 | SE 8 | — | — | ESE 8 | — | — | S 3 | — | S 3 | S 3 | SSE 3 | SSE 4 | SSE 4 |
| kJ | 1375 | 680 | 593 | 622 | 623 | 701 | 228 | 227 | — | — | 22 | — | — | 2 | — | 3 | 5 | 9 | 15 | 43 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 176 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 24 | 0 | 0 | 0 | 0 | 9 | 24 | 0 | 0 | 336 | 9 |
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.
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