
Surf Forecasts:
Dumps surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 11PM (local time) - 4ft (1.2m), 22s period, SW swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 11AM (local time) - 8ft (2.4m), 17s period, SW swell with 3,307 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 2PM (local time) - 5ft (1.5m), 12s period with SSW 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 Tuesday (Aug 11) at 2PM. The primary swell is predicted to be 1.5m and 12s period with a secondary swell of 0.4m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Dumps in the next 16 days are 2.4m 17s and forecast to arrive on Thursday (Aug 13) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Tuesday (Aug 11) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Tue 11th Aug) | 5ft (1.5m) 12s |
| Best Surf | 11PM (Tue 11th Aug) | 4ft (1.2m) 22s |
| Most Powerful | 11AM (Thu 13th Aug) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Dumps over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about this stretch ahead. The first real surf shows up on Tuesday the 11th, and we’re looking at a solid run of waves, but there’s a bit of a lull to end the first week.
The main event is Dumps (sandbar). It’s an inconsistent spot, so when it lines up, you want to be on it. The water is a nippy 56°F, which is a good 4°F colder than usual for this time of year – that’s a notable chill, so bring a thicker suit.
We kick off Tuesday morning, the 11th, with a clean 7ft swell from the south, with a period of 12 seconds. The wind is light and offshore from the ESE at 6 mph, making for some nice, clean lines. The combined energy is pumping at 1359. This is excellent for experienced surfers, as it’s over 5ft. The afternoon drops to 4ft from the SSW, still clean and very good.
Wednesday the 12th is a standout. You’ve got a 6ft SW groundswell, with a long period of 18 seconds. The wind is a light cross-offshore from the east at 6 mph. The energy is massive at 2329. This is where the long period really shines – those waves will have proper shape and power, though at a beach/sandbar setup like this, that long period can make them a bit straight. Still, for the experienced crew, this is the pick of the first week.
Thursday the 13th gets a bit trickier. The swell builds to 8ft from the SW (17 second period), and the energy is huge at 3307. But the wind goes cross-shore from the NNE, making it a bit lumpy. This is getting into expert-only territory with the size. Friday is a write-off with onshore and cross-on winds, so we’ll skip that.
Then Saturday the 15th and Sunday the 16th see a reprieve. The swell drops to a more manageable 6–6ft from the WSW, with a 14-second period. Saturday morning is glassy, with a slight air from the SE. Sunday morning is also glassy. The energy is moderate, around 1182 to 1138. These are the best windows for a wider range of surfers, as the conditions are clean and the size is fun.
After that, Monday the 17th gets a bit messy with cross-on winds, and Tuesday the 18th sees a big bump to 10ft, but with onshore and cross-on winds, making it a choppy mess. That’s more for the kite crew than paddlers.
There’s a dry spell from the 21st, with poor conditions and onshore winds. The 22nd and 23rd look promising again, with a clean 8–8ft SW swell on the 22nd, and a glassy 7ft on the 23rd. The energy jumps back up to 5057 on the 22nd afternoon – that’s strong. The last week of the month sees a mix of clean, smaller swells (4ft to 6ft) with light cross-offshore winds, offering consistent, clean waves for the daily surfer.
So for the best of the run: hit Wednesday the 12th for power and size, or Saturday morning the 15th for clean, glassy fun. The long-range stuff on the 22nd and 23rd is promising but less certain.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Fri morning, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 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) | S 12 | SSW 12 | SW 21 | SW 18 | SW 17 | WSW 16 | SW 17 | SW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
Wave Graph | |||||||||||||||||||||
1312 | 483 | 1850 | 2223 | 2238 | 1809 | 3307 | 2379 | 1908 | 1505 | 1257 | 1208 | 1161 | 1043 | 1179 | 1138 | 1633 | 2310 | 2057 | 1649 | 890 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | off | off | cross | on | cross | cross-on | on | cross-on | glassy | cross | glassy | glassy | cross | glassy | cross-on | on | glassy |
High Tide | 2:36PM1.73m | 2:54AM1.73m | 3:18PM1.83m | 3:36AM1.77m | 3:58PM1.88m | 4:15AM1.77m | 4:35PM1.88m | 4:52AM1.72m | 5:11PM1.83m | 5:27AM1.65m | 5:47PM1.75m | 6:03AM1.55m | 6:22PM1.64m | ||||||||
Low Tide | 8:24AM0.35m | 8:50PM0.36m | 9:06AM0.27m | 9:33PM0.28m | 9:45AM0.24m | 10:13PM0.26m | 10:21AM0.25m | 10:50PM0.28m | 10:56AM0.29m | 11:26PM0.34m | 11:29AM0.37m | 00:00AM0.43m | 12:02PM0.47m | 00:36AM0.54m | |||||||
7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | |
— | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 18 | 16 | 15 | 21 | 20 | 21 | 26 | 21 | 20 | 18 | 15 | 15 | 19 | 15 | 16 | 17 | 15 | 16 | 17 | 16 |
Feels °C | 9 | 15 | 13 | 12 | 19 | 17 | 17 | 21 | 19 | 16 | 14 | 14 | 14 | 17 | 14 | 15 | 16 | 14 | 15 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | S 12 | SSW 12 | SW 21 | SW 18 | SW 17 | WSW 16 | SW 17 | SW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
1312 | 483 | 1850 | 2223 | 2238 | 1809 | 3307 | 2379 | 1908 | 1505 | 1257 | 1208 | 1161 | 1043 | 1179 | 1138 | 1633 | 2310 | 2057 | 1649 | 890 | |
Swell 2 Height (m) Direction Period (s) | WSW 10 | WSW 24 | SSE 9 | SE 8 | SSE 8 | SW 21 | SE 11 | SE 10 | ESE 10 | SE 11 | SE 11 | W 5 | W 5 | W 5 | — | — | — | — | — | — | WSW 8 |
20 | 381 | 202 | 69 | 40 | 1418 | 246 | 90 | 80 | 57 | 32 | 20 | 21 | 14 | — | — | — | — | — | — | 223 | |
Swell 3 Height (m) Direction Period (s) | SW 26 | WSW 10 | SSW 11 | SW 10 | SW 10 | S 10 | — | NNW 7 | — | — | — | ESE 11 | — | — | — | — | — | — | — | — | — |
27 | 20 | 211 | 106 | 65 | 8 | — | 17 | — | — | — | 13 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 8 | SSE 8 | SE 8 | — | — | SE 7 | — | — | — | NNW 4 | NW 4 | — | — | — | — | — | — | — | — | — | — |
489 | 236 | 493 | — | — | 54 | — | — | — | 21 | 14 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 19 | 4 | 7 | 22 | 7 | 0 | 9 | 0 | 0 | 9 | 0 | 7 | 22 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











