Surf Forecasts:
Rivermouth surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 8PM (local time) - 10ft (3.0m), 9s period, SE swell with cross-onshore winds.
- Most powerful swell: Sunday 6 Sep, 5PM (local time) - 10ft (3.0m), 18s period, S swell with 5,458 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 11PM (local time) - 3ft (0.9m), 9s period with E 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 Monday (Aug 31) at 11PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.3m and 3s is also forecast. 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 3.0m 18s and forecast to arrive on Sunday (Sep 06) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 9s period and expected on Friday (Sep 04) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 31st Aug) | 3ft (0.9m) 9s |
| Best Surf | 8PM (Fri 4th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 5PM (Sun 6th Sep) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Rivermouth over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the table for the next couple of weeks.
First off, it's a bit of a slow start. The water is a touch chilly at 65.1°, a bit colder than the norm for this time of year, but that shouldn't stop you if the waves are good. The issue is, for the first few days, the surf is just too small or the conditions are a bit average. The standout in this whole window is going to be Wednesday, September 2nd. The swell from the SSW will be pushing through at 5.2 ft with a long 14-second period, which is proper groundswell. The combined energy will be pumping at a solid 1026 (moderate wave energy), and with a light cross-shore breeze in the morning, the Rivermouth should have some decent shape. That's your best bet for the week, but be aware, with a long period like that on a river mouth, it can sometimes wall up, so pick your peak.
The pattern after that gets messy. We get a big jump in size on Friday, September 4th, with 13.1 ft on the face, but it's coming from the SSE with a short 10-second period and a strong onshore wind. The wave energy is through the roof at 2682, but combined with the wind, it's going to be a washing machine. That's more of a kite-surfing day than a paddle-surfing day. That same wind and swell pattern holds through the weekend, with even bigger energy numbers on Sunday, September 6th hitting 4800 and 6554, but the same story: onshore winds and a lumpy, blown-out mess.
The second week is pretty quiet. There are a few days with some size, like Tuesday, September 15th with 8.2 ft swell from the SSW and a 9-second period, but the wind is cross-shore and the conditions are described as marginal. The energy is there (1152), but it's not going to be clean. Most of the other days in the second week are just too small, or the wind is from the wrong direction, leaving the Rivermouth looking pretty flat and choppy. There's a real long gap of poor conditions from the 4th right through to the 15th, with only a few marginal windows.
So, to be blunt: your best window is the Wednesday morning (September 2nd). Get out there for that, because the rest of the 16-day run is a bit of a write-off, with a lot of blown-out swell or nothing at all.
Short Range ForecastMostly dry. Warm (max 21°C on Tue afternoon, min 15°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 46mm), heaviest during Thu night. Warm (max 23°C on Thu morning, min 15°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | E 10 | E 10 | E 10 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 11 | S 11 | SSE 10 | SSE 10 | SE 9 | ESE 9 | ESE 8 | ESE 8 | SE 8 | S 20 | S 18 | S 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 154 | 145 | 148 | 147 | 294 | 527 | 975 | 803 | 367 | 263 | 286 | 2561 | 2682 | 1801 | 1162 | 804 | 563 | 746 | 4105 | 5458 | 3987 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | cross-on | on | cross-off | cross | on | cross | on | cross-on | on | on | cross-on | cross | cross-on | cross-on | on | cross-on | on | on |
High Tide | 5:30PM1.71m | 5:41AM1.52m | 6:01PM1.63m | 6:14AM1.42m | 6:36PM1.50m | 6:51AM1.28m | 7:18PM1.34m | 7:41AM1.12m | 8:23PM1.17m | 9:25AM0.99m | 10:48PM1.07m | 12:17PM1.05m | 00:50AM1.17m | ||||||||
Low Tide | 11:14AM0.01m | 11:40PM0.09m | 11:44AM0.08m | 00:13AM0.18m | 12:17PM0.19m | 00:51AM0.31m | 12:55PM0.34m | 1:39AM0.46m | 1:48PM0.51m | 3:01AM0.60m | 3:41PM0.65m | 5:43AM0.61m | 6:28PM0.59m | ||||||||
 | |  |  | |  | |  |  | |  |  | | | | | |  |  | |  | |
 | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — |
 | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | 3 | 24 | 2 | — | — | — | 1 | 16 | 7 | 6 | 10 |
Temp °C | 19 | 18 | 17 | 20 | 21 | 17 | 18 | 19 | 19 | 23 | 21 | 19 | 17 | 17 | 18 | 17 | 17 | 17 | 15 | 14 | 14 |
Feels °C | 18 | 17 | 17 | 20 | 20 | 18 | 18 | 18 | 19 | 23 | 20 | 17 | 13 | 13 | 14 | 16 | 16 | 17 | 12 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 11 | S 11 | E 8 | ENE 9 | NE 9 | S 15 | S 13 | S 11 | S 10 | S 20 | S 18 | S 15 |
| kJ | 154 | 145 | 148 | 117 | 294 | 527 | 975 | 803 | 367 | 263 | 286 | 60 | 237 | 31 | 67 | 123 | 157 | 133 | 4105 | 5458 | 3987 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | S 7 | S 7 | SSW 13 | E 9 | E 9 | E 8 | E 8 | — | E 6 | E 8 | — | — | SSW 16 | SSW 15 | — | S 15 | SSW 24 | E 8 | SSE 9 | E 9 |
| kJ | 90 | 39 | 24 | 147 | 81 | 76 | 51 | 51 | — | 42 | 102 | — | — | 24 | 167 | — | 4 | 189 | 191 | 948 | 58 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SW 12 | SW 11 | S 6 | S 11 | — | — | — | — | E 8 | — | — | — | SW 13 | — | — | S 15 | S 14 | S 10 | E 10 | — |
| kJ | 11 | 35 | 31 | 7 | 2 | — | — | — | — | 36 | — | — | — | 7 | — | — | 17 | 4 | 52 | 148 | — |
Wind waves Height (m) Direction Period (s) | — | — | NE 4 | — | — | — | — | — | E 9 | — | SE 4 | SSE 10 | SSE 10 | SE 9 | ESE 9 | ESE 8 | ESE 8 | SE 8 | SSE 8 | — | — |
| kJ | — | — | 6 | — | — | — | — | — | 151 | — | 6 | 2561 | 2682 | 1801 | 1162 | 804 | 563 | 746 | 452 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 107 | 258 | 0 | 1 | 103 | 0 | 1 | 260 | 182 | 124 | 31 | 919 | 919 | 900 | 383 | 435 | 433 | 405 | 904 | 900 | 872 |
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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