Surf Forecasts:
Kei Mouth surf forecast from 18 Aug 2026:
- Best quality surf: Saturday 22 Aug, 5AM (local time) - 7ft (2.1m), 7s period, NE swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 5AM (local time) - 7ft (2.1m), 7s period, NE swell with 444 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 11PM (local time) - 2.5ft (0.8m), 9s period with ENE swell.
Best Forecast Surf Conditions for Kei Mouth this week:
The surf forecast for Kei Mouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 11PM. The primary swell is predicted to be 0.8m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kei Mouth in the next 16 days are 2.1m 7s and forecast to arrive on Saturday (Aug 22) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Saturday (Aug 22) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 18th Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 5AM (Sat 22nd Aug) | 7ft (2.1m) 7s |
| Most Powerful | 5AM (Sat 22nd Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Kei Mouth over the next 16 days.
The Lowdown
Alright, Rusty here again – let me run through what’s lookin’ good for Kei Mouth in feet and miles per hour.
First off, the first ten days or so are pretty flat and bleak. From Tuesday the 18th of August, we’ve got a run of nearly no surf worth mentionin’. Most days show under 1ft, weak energy, often down in the single digits or teens – 13 ft-lbs or 34 ft-lbs, stuff like that – and the comments are callin’ it poor. You’ll find cross-shore breezes and chop, but not much else. It’s a real lull.
But then Thursday morning the 27th of August, the sea wakes up and it wakes up angry. We get 10ft from the ENE, with combined energy at 1957 ft-lbs (strong). That’s way over the 8ft mark, so this is expert-only water. The wind is cross-shore from the SSW at 16 mph, and the report says tide and wind are okay, but the swell is just too big for Kei Mouth. That morning is the standout – if you’re a charger, it’s your shot.
Friday the 28th brings 6ft from the SSE with a 14-second period – that’s long-period groundswell, energy at 1636 ft-lbs (strong). Wind is light cross-onshore from the S at 6 mph. The waves will have some shape because of that long period, but at a beach break it might break a bit straight. Still way better than the first week.
Into the first of September, Tuesday morning sees another 10ft from the ENE, again with favorable wind and tide – collectors only. The rest of that week stays on the bigger side, with 6-8ft waves, but most days are cross-shore and lumpy. Not the cleanest, but there’s size.
Water temp is about average, 68° – no big anomaly here.
So to sum it: if you’re an expert and hungry for big surf, the 27th and the 1st are your best bets. For everyone else, it’s a patient wait.
Rusty out.
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 15°C on Wed night). Winds decreasing (fresh winds from the WSW on Wed night, calm by Thu night). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sat morning, min 14°C on Sun night). Mainly strong winds. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | ENE 9 | ENE 9 | E 9 | ENE 6 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 4 | ENE 7 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 10 | ENE 10 | ENE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 147 | 113 | 79 | 213 | 68 | 34 | 22 | 22 | 13 | 23 | 204 | 131 | 53 | 17 | 7 | 7 | 8 | 9 | 9 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-on | cross-off | cross | cross-on | off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-on | cross-off | cross-on | cross-on | cross-off |
High Tide | 7:00PM1.38m | 7:07AM1.20m | 7:29PM1.23m | 7:39AM1.07m | 8:09PM1.09m | 8:35AM0.93m | 10:01PM0.97m | 12:29PM0.91m | 00:56AM1.02m | 1:46PM1.05m | 1:51AM1.15m | 2:22PM1.19m | 2:25AM1.28m | |||||||
Low Tide | 1:09AM0.41m | 1:10PM0.43m | 1:43AM0.54m | 1:44PM0.57m | 2:37AM0.67m | 2:47PM0.71m | 5:26AM0.73m | 6:22PM0.74m | 7:32AM0.61m | 7:44PM0.62m | 8:10AM0.47m | 8:21PM0.49m | ||||||||
 |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — |
 | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 18 | 22 | 24 | 18 | 18 | 18 | 16 | 18 | 19 | 18 | 23 | 22 | 17 | 18 | 18 | 16 | 19 | 19 | 16 |
Feels °C | 16 | 17 | 20 | 22 | 13 | 14 | 14 | 16 | 15 | 16 | 15 | 16 | 13 | 9 | 13 | 13 | 15 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | SSW 14 | SSW 13 | SSW 14 | SW 13 | SSW 12 | SSW 15 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | ENE 8 | ENE 8 | SSW 10 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 14 |
| kJ | 147 | 763 | 669 | 653 | 388 | 273 | 2665 | 1426 | 745 | 485 | 328 | 131 | 53 | 1020 | 1160 | 1376 | 800 | 444 | 263 | 911 |
Swell 2 Height (m) Direction Period (s) | SW 15 | ENE 9 | E 9 | ENE 6 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | NE 8 | ENE 8 | ENE 8 | ENE 9 | SSW 15 | SSW 15 | ENE 9 |
| kJ | 112 | 113 | 79 | 121 | 68 | 34 | 22 | 22 | 13 | — | — | — | — | 17 | 7 | 7 | 8 | 86 | 222 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | NE 7 | ENE 10 | ENE 10 | — |
| kJ | — | — | — | 57 | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 9 | 9 | — |
Wind waves Height (m) Direction Period (s) | SSW 8 | — | NE 4 | ENE 6 | SW 6 | SSW 8 | — | — | — | ENE 4 | ENE 7 | SSW 12 | SSW 8 | SW 10 | — | — | — | — | — | — |
| kJ | 125 | — | 13 | 213 | 245 | 270 | — | — | — | 23 | 204 | 923 | 1266 | 2040 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 74 | 1 | 354 | 1 | 1 | 0 | 302 | 401 | 0 | 276 | 525 | 292 | 1 | 3 | 0 | 1 | 1 | 0 |
Best forecast wave conditions in Eastern Cape - Wild Coast | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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Information about the Kei Mouth Surf forecast
The above surf forecast table for Kei Mouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kei Mouth can be found by selecting the local surf guide option on the grey menu. Our Kei Mouth 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 (Kei Mouth) 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 Kei Mouth 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.
Kei Mouth is 44 km (27 miles) from the city of Butterworth. If you plan a holiday in Eastern Cape - Wild Coast, look for hotels and other accommodation in Butterworth. Butterworth has rooms for a wide range of budgets as well as car hire and transport links.
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