
Surf Forecasts:
Big Bay surf forecast from 15 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 21 Jul, 8AM (local time) - 13ft (4.0m), 14s period, SW swell with 6,044 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 8PM (local time) - 10ft (3.0m), 14s period with SW swell.
Best Forecast Surf Conditions for Big Bay this week:
The surf forecast for Big Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 15) at 8PM. The primary swell is predicted to be 3.0m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Bay in the next 16 days are 4.0m 14s and forecast to arrive on Tuesday (Jul 21) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 15th Jul) | 10ft (3.0m) 14s |
| Best Surf | 8PM (Wed 15th Jul) | 10ft (3.0m) 14s |
| Most Powerful | 8AM (Tue 21st Jul) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Big Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a good look at what’s coming up for Big Bay.
We’re kicking off a bit slow, but there’s a solid run of surf to work through, especially if you’re keen on bigger, more powerful stuff. The water temp is sitting at 56°, which is a good 4° colder than normal for this time of year, so you’ll want a decent wetsuit – it’s nippy out there.
The pattern starts from Wednesday the 15th. The morning is a bit of a write-off with a weak 4ft WSW swell at 17 seconds and a cross-on breeze, so it’s not doing much. The afternoon gets interesting though – an 8ft SW swell rolls in with a 16-second period, and the energy jumps up to 3058 (moderate to strong). It’s a bit cross-shore, so it’ll be lumpy, but the size is there for the intermediate crew.
Now, Thursday the 16th morning is the first real standout. You’ve got a clean 8ft SW groundswell at 13 seconds, with a light S wind making it cross-offshore. The energy is a solid 2381 (moderate). The sets will have some punch, and the conditions are clean for experienced surfers. That’s a good session.
Friday the 17th morning is a real treat. The swell drops to 6ft SW, but the wind goes glassy – dead calm. The energy is 773 (moderate), and it’s going to be smooth and clean. A perfect morning for a longboard or a funboard.
After that, Saturday the 18th and Sunday the 19th are okay, but nothing special. The swell sits around 5ft to 6ft, and the wind is a bit messy. The real action picks up again on Monday the 21st. A massive 13ft SW swell arrives, with a 14-second period and energy at 5854 (strong), but it’s accompanied by a fresh 19 mph cross-on wind. That’s a lumpy, blown-out mess for paddle surfing. If you’re into kite surfing, the setup looks way more interesting than trying to paddle.
Tuesday the 22nd and Wednesday the 23rd are even bigger and more chaotic. The swell hits 15ft SW on Wednesday afternoon, with energy screaming up to 6566 (strong to very strong). The wind is moderate cross-onshore, but the swell is just too big for this break – it’s only for experts, and even then, it’s a wild guess.
The real second-week standout is Saturday the 25th morning. The swell has dropped to a very surfable 8ft SW, with a 14-second period and energy at 2348 (moderate). The wind is glassy again. That’s a clean, powerful, and excellent session for experienced surfers. The water is still cold, but the conditions will be magic.
Sunday the 26th through Tuesday the 29th keep delivering clean, cross-offshore winds with consistent SW swell around 5ft to 7ft. The energy is moderate, and the wind is light, so you’ll be getting clean, lined-up waves. The Tuesday the 30th starts to get a bit messy again with a cross-chop, but the swell is still solid.
Best of the lot: Thursday the 16th morning for the big, clean groundswell, and Saturday the 25th morning for the perfect glassy conditions on a solid 8ft swell. Don’t sleep on that Saturday session.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Fri afternoon, min 13°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Very mild (max 17°C on Sat afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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) | WSW 17 | SW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 11 | SW 10 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 9 | SW 11 | SW 14 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
963 | 2982 | 3558 | 2381 | 1671 | 1013 | 773 | 584 | 341 | 976 | 625 | 683 | 551 | 357 | 263 | 268 | 260 | 1401 | 5854 | 4873 | 3415 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | cross-off | cross | cross-off | glassy | cross-on | glassy | cross-on | on | cross | cross-off | cross | glassy | cross-on | on | cross | cross-on | cross-on | cross |
High Tide | 4:12PM1.61m | 4:28AM1.54m | 4:55PM1.63m | 5:12AM1.48m | 5:37PM1.59m | 5:55AM1.39m | 6:19PM1.52m | 6:38AM1.28m | 7:01PM1.42m | 7:23AM1.17m | 7:45PM1.31m | 8:15AM1.07m | 8:37PM1.19m | ||||||||
Low Tide | 9:58AM-0.00m | 10:25PM0.08m | 10:40AM0.01m | 11:11PM0.09m | 11:20AM0.07m | 11:55PM0.15m | 12:00PM0.16m | 00:39AM0.23m | 12:39PM0.27m | 1:24AM0.33m | 1:21PM0.39m | 2:14AM0.43m | 2:09PM0.51m | 3:14AM0.51m | |||||||
7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:47 | — | — | 7:47 | — | — | 7:46 | — | — | 7:46 | — | — | |
— | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 14 | 16 | 15 | 16 | 18 | 16 | 16 | 17 | 15 | 14 | 15 | 13 | 13 | 14 | 13 | 14 | 15 | 13 |
Feels °C | 14 | 15 | 14 | 13 | 14 | 14 | 15 | 18 | 16 | 15 | 15 | 14 | 13 | 12 | 11 | 11 | 10 | 10 | 8 | 8 | 6 |
Swell 1 Height (m) Direction Period (s) | WSW 17 | SW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 11 | SW 10 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 9 | SW 11 | SW 14 | SW 14 | SW 13 |
963 | 2982 | 3558 | 2381 | 1671 | 1013 | 773 | 584 | 341 | 976 | 625 | 683 | 551 | 357 | 263 | 268 | 260 | 1401 | 5854 | 4873 | 3415 | |
Swell 2 Height (m) Direction Period (s) | W 9 | W 9 | — | — | — | — | — | S 14 | S 13 | S 11 | SW 10 | W 11 | W 11 | W 10 | S 9 | W 10 | W 9 | W 9 | — | — | SSW 15 |
165 | 76 | — | — | — | — | — | 15 | 52 | 64 | 384 | 297 | 279 | 218 | 130 | 90 | 62 | 40 | — | — | 312 | |
Swell 3 Height (m) Direction Period (s) | SW 11 | — | — | — | — | — | — | — | SW 16 | — | S 11 | S 10 | S 10 | S 10 | W 10 | SW 7 | SW 11 | SW 16 | — | — | — |
59 | — | — | — | — | — | — | — | 10 | — | 58 | 33 | 72 | 148 | 123 | 34 | 75 | 69 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNW 4 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 24 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 34 | 0 | 4 | 29 | 2 | 0 | 0 | 0 | 29 | 29 | 36 | 181 | 400 | 181 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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Information about the Big Bay Surf forecast
The above surf forecast table for Big Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Bay can be found by selecting the local surf guide option on the grey menu. Our Big 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 (Big 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 Big 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.
Big Bay is 8 km (5 miles) from the very large city of Robben Island. If you plan a holiday in Cape Town, look for hotels and other accommodation in Robben Island. Robben Island has rooms for a wide range of budgets as well as cheap car hire and transport links.










