Surf Forecasts:
Rivermouth surf forecast from 1 Sep 2026:
- Best quality surf: Sunday 6 Sep, 8PM (local time) - 13ft (4.0m), 19s period, S swell with cross-onshore winds.
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 13ft (4.0m), 19s period, S swell with 11,333 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 8PM (local time) - 3.5ft (1.1m), 13s period with SSW 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 Tuesday (Sep 01) at 8PM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.7m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rivermouth in the next 16 days are 4.0m 19s and forecast to arrive on Sunday (Sep 06) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 1st Sep) | 3.5ft (1.1m) 13s |
| Best Surf | 8PM (Sun 6th Sep) | 13ft (4.0m) 19s |
| Most Powerful | 8PM (Sun 6th Sep) | 13ft (4.0m) 19s |
Table - best surf conditions forecast for Rivermouth over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s look at what’s happening at Rivermouth over the next couple weeks. It’s a tough stretch to start. The water’s sitting around 66°F, which is a bit colder than normal for the season – you’ll notice it. The first few days are small and messy, with tricky tides, so no need to rush.
The first real chance pops up on Wednesday morning, September 2nd. We’ve got a 6ft swell from the SSW with a 14-second period – groundswell with some grunt. Winds are light and cross, keeping things clean. Combined energy is 1095, solid. This break is beginner-friendly and very consistent, so it’s a good spot for a longboard or learning. Crowds show up sometimes, so keep an eye out.
Friday morning, September 4th is blown out. That swell jumps to 10ft from the SSE, way too big for most, and onshore winds ruin it. Combined energy hits 3171 – strong but messy. Stay out.
The real standout is Sunday afternoon, September 6th. Swell size is 8ft from the S, but the period is a massive 21 seconds – very long-period groundswell, with combined energy of 6266 (very strong). At a river mouth setup, that long period can produce powerful, lined-up waves with good gaps between sets. Wind is a gentle cross-onshore, so it’ll be a bit bumpy, but the quality should still be on. This is for experienced surfers only, given the size. Crowds are a possibility.
After that, the week from September 7th onward gets thin. Tuesday morning, September 8th has a 6ft E swell with clean cross-offshore winds – a quiet, fun-sized session if you’re keen, but energy is moderate (785). Then from the 10th, it drops right off. Small swells, onshore winds, and mostly poor conditions dominate for several days straight. The 16th offers a weak 3ft SSW swell with a 12-second period and light cross winds – barely worth the paddle.
So, the takeaway: early next week (Sep 2) gives you clean, manageable waves, and Sunday the 6th is the big, powerful day for those ready for it. The rest is a write-off. Forecasts can change, though – it doesn’t usually stay flat for long around here.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Thu night. Warm (max 24°C on Thu afternoon, min 16°C on Tue night). Winds increasing (calm on Tue night, strong winds from the SSE by Thu night). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Fri night. Very mild (max 18°C on Sun afternoon, min 15°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 11 | SSW 11 | S 10 | SSE 10 | SSE 9 | SE 8 | ESE 8 | S 11 | S 11 | SSW 10 | S 21 | S 17 | S 14 | S 13 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 117 | 294 | 624 | 1095 | 815 | 440 | 268 | 764 | 2844 | 1966 | 1144 | 619 | 303 | 251 | 269 | 442 | 5658 | 7367 | 2125 | 1121 | 699 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | cross-on | cross | cross | cross | on | on | on | cross-on | cross | cross-on | cross-on | on | cross-on | cross | cross | cross | cross |
High Tide | 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 | 1:31PM1.24m | 1:49AM1.33m | ||||||||
Low Tide | 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 | 7:15AM0.46m | 7:42PM0.42m | ||||||||
 | |  |  |  | | | |  | | |  | | |  |  | | | | |  | |
 | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | 9 | — | — | 1 | — | — | 4 | 1 | — | — | — | — | — |
Temp °C | 20 | 21 | 17 | 18 | 19 | 19 | 22 | 24 | 19 | 17 | 17 | 16 | 17 | 17 | 17 | 17 | 18 | 17 | 19 | 20 | 17 |
Feels °C | 20 | 20 | 18 | 17 | 18 | 17 | 21 | 22 | 19 | 12 | 12 | 12 | 14 | 15 | 16 | 14 | 15 | 14 | 13 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | E 10 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 11 | S 11 | ENE 10 | SSE 10 | SSE 9 | SE 8 | S 8 | S 11 | S 11 | S 10 | S 21 | S 17 | S 14 | S 13 | E 9 |
| kJ | 117 | 294 | 624 | 1095 | 815 | 440 | 268 | 291 | 31 | 1966 | 1144 | 619 | 113 | 251 | 269 | 239 | 5658 | 7367 | 2125 | 1121 | 699 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | E 9 | E 9 | E 8 | E 9 | E 9 | E 6 | E 8 | — | ENE 10 | E 10 | S 15 | S 13 | E 10 | SE 7 | E 10 | E 10 | E 9 | — | — | SSE 12 |
| kJ | 111 | 106 | 57 | 36 | 38 | 39 | 42 | 84 | — | 75 | 46 | 106 | 119 | 31 | 43 | 121 | 96 | 63 | — | — | 437 |
Swell 3 Height (m) Direction Period (s) | S 6 | E 6 | — | — | — | — | E 8 | SW 12 | — | SW 12 | S 18 | E 10 | E 10 | SE 10 | E 7 | S 14 | — | — | — | — | SSW 13 |
| kJ | 12 | 17 | — | — | — | — | 35 | 210 | — | 73 | 25 | 49 | 32 | 4 | 37 | 239 | — | — | — | — | 133 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 5 | — | SSW 11 | S 10 | SE 9 | — | — | ESE 8 | ESE 7 | — | SSW 10 | SSE 10 | ENE 9 | ENE 6 | ENE 8 | ENE 9 |
| kJ | — | — | — | — | — | 34 | — | 764 | 2844 | 1132 | — | — | 303 | 249 | — | 442 | 512 | 121 | 303 | 785 | 1210 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 260 | 0 | 1 | 308 | 182 | 26 | 107 | 166 | 1736 | 2982 | 511 | 426 | 433 | 300 | 511 | 870 | 495 | 487 | 495 | 121 |
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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