Surf Forecasts:
Koeel Bay surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 5AM (local time) - 8ft (2.4m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 8AM (local time) - 8ft (2.5m), 14s period, SSW swell with 2,244 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 8PM (local time) - 6.5ft (2.0m), 13s period with SSW swell.
Best Forecast Surf Conditions for Koeel Bay this week:
The surf forecast for Koeel Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 8PM. The primary swell is predicted to be 2.0m and 13s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Koeel Bay in the next 16 days are 2.5m 14s and forecast to arrive on Thursday (Aug 20) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Tuesday (Aug 25) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 18th Aug) | 6.5ft (2.0m) 13s |
| Best Surf | 5AM (Thu 20th Aug) | 8ft (2.4m) 14s |
| Most Powerful | 8AM (Thu 20th Aug) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Koeel Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down Koeel Bay.
We've got a decent run of waves coming, but it's not all smooth sailing. The water is sitting at 57°, a bit colder than normal, so don't forget a good wetsuit.
It starts on Tuesday, August 18th, with some chest-high swell around 6ft from the SW. Wind is cross-offshore, and there's a big 1147 combined energy reading, so there's plenty of power. The call is marginal, so it's a bit iffy to start.
Wednesday the 19th looks cleaner, with a 6ft SSW swell and lighter cross-off winds. The energy drops to 808, but it's still fun. By Wednesday afternoon, the wind goes cross and the size drops to 5ft, so the morning is the better session.
Now, here's the one you need to circle. Thursday morning, August 20th. We're looking at a solid 8ft SSW swell with a 13-second period, cross-offshore winds, and an energy reading of 1859. This is excellent surf for experienced surfers only. That's a lot of water moving, so if you're not comfortable overhead, sit this one out. The afternoon gets a bit more wind.
Friday the 21st is a stunner. Morning has a 5ft SSW swell with offshore winds, and then Friday afternoon turns glassy. That's clean, lined-up waves with no breeze. Perfect for a long session.
The weekend goes south. Saturday the 22nd is a washout with onshore winds and poor conditions. Sunday the 23rd bounces back with a 5ft SW swell and cross-off winds, giving you clean waves in the morning.
Looking into the second week, Monday the 24th is small and weak. Tuesday the 25th is your next real highlight. Morning has a 5ft SW swell with a 14-second period, offshore winds, and energy at 934. It's clean and punchy. Wednesday the 26th is glassy but small at 4ft.
From there, it fades out with poor wind and small waves until Friday the 28th, which brings back a 5ft SW swell but with gusty cross-off winds. The energy is back up to 1034, but it's marginal.
The very end of the period, Monday the 31st of August, shows a big 6ft SW swell with a 16-second period and energy of 1782. That's a long-period groundswell that will wrap into the reef nicely, but the wind is cross. Could be a late call if the wind shifts.
Overall, Thursday the 20th morning is your absolute best bet. Friday the 21st afternoon is the glassy gem. Tuesday the 25th morning is another solid option in the second week.
Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 16°C on Tue afternoon, min 11°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Fri afternoon, min 11°C on Fri night). Wind will be generally light. | |||||||||||||||||||
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) | SW 13 | SSW 12 | SSW 12 | SW 12 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SW 10 | SW 13 | SW 12 | WSW 13 | SW 12 | SSW 10 | SSW 10 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1147 | 1073 | 808 | 718 | 1100 | 1859 | 1230 | 761 | 495 | 452 | 352 | 238 | 441 | 1242 | 773 | 346 | 488 | 169 | 320 | 347 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross | cross-off | cross-off | cross-off | off | off | glassy | cross-on | cross-on | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 6:48PM1.31m | 7:09AM1.12m | 7:28PM1.17m | 8:00AM1.00m | 8:28PM1.05m | 9:38AM0.93m | 10:23PM0.99m | 11:53AM0.96m | 00:09AM1.05m | 1:00PM1.07m | 1:05AM1.15m | 1:38PM1.20m | 1:43AM1.25m | |||||||
Low Tide | 1:05AM0.43m | 1:02PM0.51m | 1:50AM0.55m | 1:51PM0.63m | 3:13AM0.64m | 3:46PM0.71m | 5:32AM0.63m | 6:06PM0.67m | 6:47AM0.54m | 7:07PM0.57m | 7:28AM0.43m | 7:45PM0.45m | ||||||||
 |  | | | | | | | | | |  | | | | | | | | | |
 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — |
 | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 13 | 14 | 15 | 14 | 15 | 16 | 13 | 16 | 20 | 15 | 14 | 16 | 14 | 15 | 16 | 12 | 16 | 17 | 14 |
Feels °C | 13 | 9 | 11 | 12 | 14 | 13 | 13 | 10 | 14 | 18 | 15 | 9 | 14 | 13 | 13 | 13 | 10 | 13 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 12 | SSW 12 | SW 12 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SW 10 | SW 13 | SW 12 | SSW 11 | SW 12 | SSW 10 | SSW 10 | SW 10 |
| kJ | 1147 | 1073 | 808 | 718 | 1100 | 1859 | 1230 | 761 | 495 | 452 | 352 | 238 | 441 | 1242 | 773 | 270 | 488 | 169 | 320 | 225 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SSW 11 | SSW 10 | WSW 11 | — | SW 17 | — | — | WSW 13 | — | SW 12 | SSW 14 | SSW 14 |
| kJ | — | — | — | — | — | — | — | — | 401 | 316 | 340 | — | 12 | — | — | 346 | — | 137 | 38 | 347 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | WSW 10 | — | — | — | — | — | SSW 13 | SSW 14 | W 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 125 | — | — | — | — | — | 63 | 125 | 238 |
Wind waves Height (m) Direction Period (s) | SSE 3 | ESE 4 | — | — | — | — | — | E 3 | ESE 4 | SE 5 | — | N 3 | NNW 3 | — | — | — | — | SE 3 | — | SE 3 |
| kJ | 3 | 12 | — | — | — | — | — | 2 | 43 | 44 | — | 7 | 2 | — | — | — | — | 2 | — | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 15 | 0 | 0 | 10 | 0 | 0 | 47 | 0 | 0 | 0 | 14 | 22 | 18 | 0 | 0 | 0 | 0 | 15 | 15 | 0 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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Information about the Koeel Bay Surf forecast
The above surf forecast table for Koeel Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Koeel Bay can be found by selecting the local surf guide option on the grey menu. Our Koeel Bay 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 (Koeel Bay) 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 Koeel Bay 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.
Koeel Bay is 18 km (11 miles) from the city of Grabouw. If you plan a holiday in Overberg, look for hotels and other accommodation in Grabouw. Grabouw has rooms for a wide range of budgets as well as car hire and transport links.
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