Surf Forecasts:
Rivermouth surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 5AM (local time) - 6ft (1.9m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 2PM (local time) - 7ft (2.1m), 13s period, S swell with 1,465 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 5AM (local time) - 6ft (1.9m), 8s period with SE swell.
Best Forecast Surf Conditions for Rivermouth this week:
The surf forecast for Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 5AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 1.0m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rivermouth in the next 16 days are 2.1m 13s and forecast to arrive on Tuesday (Aug 11) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 12th Aug) | 6ft (1.9m) 8s |
| Best Surf | 5AM (Wed 12th Aug) | 6ft (1.9m) 8s |
| Most Powerful | 2PM (Tue 11th Aug) | 7ft (2.1m) 13s |
Table - best surf conditions forecast for Rivermouth over the next 16 days.
The Lowdown
Alright, grab your board. Rusty here.
We’ve got a bit of a mixed bag coming our way at Rivermouth. The water is sitting at 63°, which is a good 5° colder than normal for this time of year – that’s a notable chill, so don't forget the booties if you’re heading out.
The first week is a bit of a write-off, honestly. We’ve got a long stretch of poor conditions and marginal surf. The best bet for a real session doesn't come until the morning of Saturday the 15th. The swell is a clean 5 ft from the east, with a gentle cross-offshore breeze. The combined energy is moderate, hitting 280, and it’s the first time we see "clean" written in the books. It’s not a monster, but it’s the most promising window in a week of messy cross-shore chop.
The absolute standout, though, is the morning of Tuesday the 18th. It’s a full 16 days out, so keep your expectations in check, but the forecast is calling for a glassy 5 ft easterly swell with a 10-second period. The wind is dead calm. The combined energy is a solid 695, and it’s the only "very good surf conditions" call in the entire run. This is the one you circle on the calendar.
After that, we get a pulse on the 19th of August with an 8 ft easterly swell (1927 energy), but that’s packed with a 9 mph cross-shore wind and only marginal conditions. It’s powerful, but it’s going to be a lumpy mess. A few days later, on the 24th, there’s a 5 ft groundswell from the SSW with a 14-second period. That’s a long period, likely breaking a bit straight at Rivermouth, but there’s a chance for a sneaky clean one if the wind plays nice.
Don't get too excited about the small stuff at the end of the run. It’s mostly flat and weak. For now, lock in the 18th.
Rusty.
Short Range ForecastHeavy rain (total 33mm), heaviest during Sun night. Very mild (max 17°C on Sun afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the WSW on Sun afternoon, light winds from the SSE by Mon night). | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Fri afternoon, min 13°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 7 | S 8 | SSW 9 | S 8 | S 11 | S 10 | S 13 | SE 8 | SE 8 | E 9 | E 7 | SSW 17 | SSW 20 | SSW 18 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 334 | 857 | 442 | 200 | 573 | 700 | 1285 | 486 | 233 | 287 | 203 | 333 | 298 | 273 | 153 | 250 | 319 | 255 | 332 | 368 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | on | on | cross-on | cross | cross | cross-on | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross | cross-off |
High Tide | 1:48AM1.35m | 2:24PM1.36m | 2:40AM1.48m | 3:09PM1.52m | 3:22AM1.58m | 3:48PM1.66m | 4:00AM1.63m | 4:25PM1.74m | 4:35AM1.64m | 4:59PM1.76m | 5:08AM1.60m | 5:31PM1.73m | ||||||||
Low Tide | 7:30PM0.45m | 8:11AM0.30m | 8:30PM0.30m | 8:56AM0.16m | 9:16PM0.17m | 9:34AM0.04m | 9:56PM0.08m | 10:09AM-0.03m | 10:33PM0.04m | 10:42AM-0.05m | 11:07PM0.05m | 11:13AM-0.02m | 11:40PM0.11m | |||||||
 |  | |  |  | |  | |  |  |  | | | | | | | | | | |
 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — |
 | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — |
mm | 2 | 19 | 1 | 2 | 5 | 3 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 15 | 14 | 13 | 14 | 14 | 14 | 14 | 16 | 17 | 16 | 17 | 19 | 16 | 20 | 22 | 17 | 22 | 23 | 18 |
Feels °C | 12 | 9 | 9 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 14 | 12 | 16 | 18 | 14 | 19 | 20 | 16 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | E 9 | SSW 9 | S 8 | S 11 | S 10 | S 13 | SE 8 | SE 8 | SE 8 | E 7 | SSW 17 | SSW 20 | SSW 18 | SSW 16 | E 10 | E 8 | E 8 | SSW 14 | E 8 |
| kJ | 195 | 28 | 442 | 200 | 573 | 700 | 1285 | 486 | 233 | 157 | 203 | 333 | 298 | 273 | 151 | 34 | 319 | 255 | 18 | 368 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | SE 8 | SE 8 | SSW 14 | S 14 | E 10 | S 12 | SSW 11 | S 11 | S 10 | E 10 | SSW 16 | S 10 | E 11 | SSW 15 | SSW 16 | SSW 14 | S 13 | SSW 13 |
| kJ | 64 | 45 | 270 | 164 | 210 | 474 | 47 | 336 | 202 | 191 | 106 | 64 | 193 | 16 | 35 | 93 | 48 | 21 | 3 | 18 |
Swell 3 Height (m) Direction Period (s) | ESE 7 | — | E 9 | SSW 11 | E 10 | E 9 | E 10 | S 26 | SSW 23 | SSW 21 | E 9 | S 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 14 | S 13 | S 12 |
| kJ | 5 | — | 27 | 100 | 29 | 27 | 71 | 13 | 106 | 180 | 80 | 32 | 17 | 16 | 2 | 2 | 1 | 4 | 3 | 11 |
Wind waves Height (m) Direction Period (s) | SSW 7 | S 8 | — | — | SE 7 | SE 8 | ESE 8 | E 9 | E 9 | E 9 | ENE 6 | E 7 | E 6 | E 6 | E 7 | E 7 | ENE 7 | ENE 8 | E 8 | ENE 8 |
| kJ | 334 | 857 | — | — | 104 | 229 | 219 | 60 | 199 | 287 | 109 | 124 | 205 | 188 | 153 | 250 | 444 | 336 | 332 | 536 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 589 | 459 | 923 | 31 | 31 | 511 | 107 | 121 | 458 | 511 | 3 | 300 | 383 | 129 | 269 | 433 | 12 | 0 | 269 | 3 |
Best forecast wave conditions in Eastern Cape - Wild Coast | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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Information about the Rivermouth Surf forecast
The above surf forecast table for Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Rivermouth 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 (Rivermouth) 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 Rivermouth 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 Eastern Cape - Wild Coast? If you are looking for accommodation near Rivermouth, camping, hotels and holiday cottages in Eastern Cape - Wild Coast, consider staying in East London which is 26 km (16 miles) away. Other places in and around Eastern Cape - Wild Coast where you can find information about places to rent, and car hire include Butterworth which is 59 km (37 miles) away, Stutterheim and Bisho.
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