Surf Forecasts:
Koeel Bay surf forecast from 7 Sep 2026:
- Best quality surf: Thursday 10 Sep, 11AM (local time) - 6ft (1.8m), 16s period, SW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 11AM (local time) - 6ft (1.8m), 16s period, SW swell with 1,552 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 4.5ft (1.4m), 14s 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 Monday (Sep 07) at 11AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.2m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Koeel Bay in the next 16 days are 1.8m 16s and forecast to arrive on Thursday (Sep 10) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 4s period and expected on Thursday (Sep 10) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 7th Sep) | 4.5ft (1.4m) 14s |
| Best Surf | 11AM (Thu 10th Sep) | 6ft (1.8m) 16s |
| Most Powerful | 11AM (Thu 10th Sep) | 6ft (1.8m) 16s |
Table - best surf conditions forecast for Koeel Bay over the next 16 days.
The Lowdown
Rusty here again, same story but in feet and knots.
We’ve got a run of surf at Koeel Bay, and while it starts a little slow, there’s a couple of real standout sessions that’ll make it worth it.
The pattern kicks off Monday with clean but small waves, around 5ft, glassy morning. Don’t get too excited though—Tuesday and Wednesday drop right off, barely surfable. But Thursday the 10th is where it gets interesting. A solid 6ft southwest groundswell, 16-second period, and a gentle offshore breeze in the morning. The combined swell energy is at 1552 (moderate-strong), plenty of grunt. This one is the pick: not for beginners at that size, but for intermediates and up, Thursday morning is the standout session.
Saturday the 12th is another beauty. The afternoon brings 5ft southwest swell, 16-second period, with a moderate offshore wind. Combined energy hits 1134, and those long-period waves will be peeling nicely down the reef. Glassy conditions and consistent sets—this is where you want to be.
After that, things fall apart. Sunday the 13th and Monday the 14th are blown out with strong cross-onshore winds, so don’t bother. Wednesday the 16th cleans up, with 7ft southwest groundswell and 13-second period, cross-offshore wind. But the energy is monstrous at 4498 (very strong)—this is expert-only territory. Only the strong and skilled should paddle out.
The second week tapers off. Thursday the 17th is clean but a 28 knot offshore breeze in the afternoon makes it hard to paddle into. Friday and Saturday drop in quality, and by Sunday the 20th, onshore winds kill it again.
Water temperature is about 57°, a bit colder than usual for September, so you’ll want a good wetsuit. Crowds are possible at Koeel Bay, but with these mid-week dates, you might get a few waves to yourself if you’re early.
Keep your eye on Thursday morning and Saturday afternoon—those are the ones.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 15°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 21°C on Sat afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the SE on Fri afternoon, light winds from the NNE by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | SSW 14 | SSW 13 | SSW 12 | S 11 | SW 11 | SW 15 | SW 13 | SW 13 | SW 12 | SW 16 | SW 14 | SW 13 | SSE 7 | SSE 7 | SE 7 | SW 14 | SW 16 | SSW 15 | SW 14 | SSW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 754 | 653 | 387 | 144 | 96 | 75 | 109 | 106 | 252 | 1552 | 911 | 562 | 406 | 471 | 268 | 450 | 1031 | 1001 | 711 | 617 | 394 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | glassy | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | off | off | cross | cross-on | cross-on | on |
High Tide | 12:46PM1.28m | 1:07AM1.34m | 1:35PM1.45m | 1:54AM1.45m | 2:15PM1.59m | 2:33AM1.53m | 2:52PM1.69m | 3:10AM1.58m | 3:26PM1.73m | 3:44AM1.58m | 3:59PM1.72m | 4:16AM1.54m | 4:30PM1.65m | 4:48AM1.47m | |||||||
Low Tide | 7:05PM0.34m | 7:25AM0.23m | 7:53PM0.20m | 8:06AM0.12m | 8:33PM0.08m | 8:43AM0.05m | 9:10PM0.01m | 9:16AM0.01m | 9:44PM-0.01m | 9:48AM0.02m | 10:15PM0.02m | 10:19AM0.07m | 10:45PM0.08m | ||||||||
 | |  | | | | | | |  |  |  | | | | |  |  | |  | | |
 | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 24 | 27 | 22 | 24 | 26 | 20 | 20 | 19 | 15 | 18 | 17 | 15 | 15 | 15 | 16 | 18 | 21 | 18 | 17 | 18 | 16 |
Feels °C | 23 | 26 | 20 | 24 | 26 | 19 | 19 | 17 | 13 | 16 | 13 | 12 | 11 | 11 | 14 | 16 | 19 | 15 | 13 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | S 11 | S 10 | SW 11 | SW 13 | SW 13 | SW 12 | SW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 14 | SW 16 | SSW 15 | SW 14 | SSW 14 | S 8 |
| kJ | 754 | 653 | 387 | 144 | 70 | 40 | 109 | 106 | 252 | 1552 | 911 | 562 | 398 | 277 | 203 | 450 | 1031 | 1001 | 711 | 617 | 266 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 9 | SW 18 | SW 12 | SW 11 | SW 15 | SSE 9 | SSW 8 | SW 19 | — | — | — | — | SW 16 | S 11 | SSW 8 | SE 11 | S 7 | S 8 | S 7 | SW 13 |
| kJ | 8 | 95 | 12 | 112 | 96 | 75 | 15 | 6 | 184 | — | — | — | — | 39 | 59 | 13 | 4 | 45 | 57 | 28 | 394 |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 10 | SW 16 | SW 16 | SSE 9 | SSW 8 | SSE 10 | SSE 8 | — | — | — | — | — | — | — | — | SE 8 | SE 11 | SE 12 | ESE 10 |
| kJ | — | — | 61 | 10 | 38 | 16 | 7 | 9 | 7 | — | — | — | — | — | — | — | — | 23 | 19 | 5 | 42 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SSE 2 | S 3 | SSE 3 | SSE 3 | — | SSE 4 | S 7 | SSE 7 | SSE 7 | SE 7 | SSE 7 | SSE 7 | — | NNW 4 | NNW 4 | — |
| kJ | — | — | — | — | — | 1 | 3 | 3 | 6 | — | 20 | 311 | 406 | 471 | 268 | 116 | 99 | — | 16 | 20 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 47 | 10 | 0 | 5 | 34 | 58 | 365 | 0 | 0 | 0 | 4 | 238 | 30 | 19 |
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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