
Surf Forecasts:
Big Bay surf forecast from 11 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 5PM (local time) - 10ft (3.0m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 15 Jul, 11PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,626 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 2PM (local time) - 6.5ft (2.0m), 12s period with SSW 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 Saturday (Jul 11) at 2PM. The primary swell is predicted to be 2.0m and 12s period with a secondary swell of 0.7m and 11s. 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 3.5m 14s and forecast to arrive on Wednesday (Jul 15) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Friday (Jul 17) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 11th Jul) | 6.5ft (2.0m) 12s |
| Best Surf | 5PM (Wed 15th Jul) | 10ft (3.0m) 15s |
| Most Powerful | 11PM (Wed 15th Jul) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Big Bay over the next 16 days.
Alright, Rusty here. Let’s get straight into it.
We’ve got a run of swell coming into Big Bay over the next couple of weeks, and honestly, it’s got some real teeth. The water’s a bit colder than normal for this time of year at 57°, so you’ll want that extra layer.
The action kicks off on Saturday the 11th. Saturday morning you’ve got a solid 7ft SSW groundswell with a 12-second period, and combined energy is pumping at (1356). That’s clean, with a light offshore breeze from the ESE. This is for experienced surfers – there’s some weight in those waves. The swell drops slightly by Saturday afternoon to 6ft but stays clean with a cross-off wind. Good, but the morning is the pick.
Sunday the 12th starts with 5ft S swell, still clean with offshore wind, and the energy is moderate at (682). It’s a step down but still very good. By the afternoon, the wind swings cross-shore and the waves drop to 4ft – marginal, not worth rushing for.
Monday the 13th is small, with just 3ft SSW swell. But the morning is dead glassy, and that’s a treat for getting out on a longboard or a funboard. Very clean conditions, even if the wave energy is weak (271).
Tuesday and Wednesday the 14th and 15th stay small and mixed wind-wise. Wednesday morning the 15th sees a return of glassy conditions with 4ft SW swell and a period of 11 seconds – a nice little window. But the real standout on Wednesday is the afternoon. That’s a 10ft SW groundswell with a 15-second period. Energy is massive (3724). The wind is cross-off and light, keeping it clean. This is expert territory – over 8ft, so leave the foamies at home. The long period makes it best at the point or reef, and it’ll have some serious power. That’s your first week highlight.
Thursday the 16th stays big, 10ft and 8ft, but the wind is cross-on and lumpy. Not the cleanest, but still plenty of juice for the brave.
Friday the 17th though – wow. Morning session has 12ft SSW at 13 seconds with a moderate offshore from the SE at 16 mph. That is clean, powerful, and for experts only. Energy is (3318). The afternoon holds 10ft with cross-off wind. Another standout, but the morning is the session to aim for.
Saturday the 18th winds down a little, with 7ft SW in the morning and clean conditions. Good for strong intermediates. The next few days drop into the 3ft to 4ft range with some glassy windows on Sunday the 19th and Monday the 20th – lovely if you want a mellow paddle.
Then we’ve got a bit of a lull before the real firecracker. Tuesday the 21st sees a pulse of long-period (18 seconds!) SW groundswell, but only at 3ft. It’s a tease. But Wednesday the 22nd delivers proper size again with 6ft SW, glassy morning – that’s a clean, powerful session for experienced surfers.
Now the second week. The run to the end of July builds into something monstrous. Friday the 24th brings 8ft SW, clean. But the real standout is Saturday the 25th afternoon – 12ft SW at 16 seconds, energy at (5888). That is serious water moving. And then Sunday the 26th morning? 13ft SW at 15 seconds, glassy, with energy at (8891). That is the session of the outlook. It’s for expert surfers only – absolutely not for beginners. The swell is huge, the period is long, and it is going to be spectacular at the right break. Promising, but it’s still over a week away, so keep an eye on it.
Crowds at Big Bay are often, so expect company on those good days, especially the weekend standouts.
Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Tue afternoon, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
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 12 | SSW 12 | SSW 11 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | W 12 | W 10 | W 10 | W 9 | SW 11 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SSW 13 | SSW 13 | SSW 14 |
Wave Graph | |||||||||||||||||||||
1197 | 833 | 866 | 545 | 337 | 260 | 173 | 163 | 171 | 162 | 156 | 132 | 332 | 3660 | 4464 | 2880 | 2045 | 2756 | 3318 | 3344 | 3066 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross | cross-off | glassy | cross-on | glassy | cross-on | on | cross | glassy | cross-off | glassy | cross-on | cross-on | cross-off | off | cross-off | off |
High Tide | 12:49PM1.25m | 1:03AM1.41m | 1:48PM1.36m | 2:02AM1.49m | 2:40PM1.47m | 2:54AM1.55m | 3:27PM1.56m | 3:42AM1.56m | 4:12PM1.61m | 4:28AM1.54m | 4:55PM1.63m | 5:12AM1.48m | 5:37PM1.59m | ||||||||
Low Tide | 6:51PM0.37m | 7:34AM0.17m | 7:53PM0.26m | 8:26AM0.08m | 8:48PM0.17m | 9:14AM0.02m | 9:38PM0.10m | 9:58AM-0.00m | 10:25PM0.08m | 10:40AM0.01m | 11:11PM0.09m | 11:20AM0.07m | 11:55PM0.15m | ||||||||
7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | |
— | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 18 | 16 | 15 | 18 | 17 | 15 | 17 | 15 | 15 | 16 | 14 | 15 | 15 | 14 | 14 | 15 | 14 | 11 | 14 | 12 |
Feels °C | 12 | 16 | 14 | 13 | 16 | 16 | 14 | 15 | 14 | 13 | 13 | 13 | 15 | 14 | 13 | 12 | 12 | 11 | 5 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 11 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | W 12 | W 10 | W 10 | W 9 | SW 11 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SSW 13 | SSW 13 | SSW 14 |
1197 | 833 | 866 | 545 | 337 | 260 | 173 | 163 | 171 | 162 | 156 | 132 | 332 | 3660 | 4464 | 2880 | 2045 | 2756 | 3318 | 3344 | 3066 | |
Swell 2 Height (m) Direction Period (s) | W 11 | SW 12 | W 11 | W 11 | W 11 | W 10 | W 10 | W 9 | SSW 9 | S 9 | SW 12 | SW 12 | W 9 | W 10 | — | — | — | — | — | — | — |
152 | 244 | 163 | 112 | 110 | 69 | 66 | 40 | 90 | 25 | 55 | 52 | 104 | 64 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | W 19 | W 12 | SW 18 | WSW 16 | SW 15 | SW 15 | SW 14 | WSW 12 | SW 13 | SW 13 | S 9 | SW 18 | SW 16 | — | — | — | — | — | — | — | — |
7 | 166 | 12 | 25 | 37 | 33 | 32 | 51 | 61 | 59 | 25 | 108 | 258 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SSE 7 | — | — | — | — | — | — | — | — | WNW 2 | — | — | — | — | — | — | — | SE 5 | — | — |
— | 128 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 71 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 29 | 29 | 2 | 0 | 0 | 0 | 4 | 29 | 882 | 0 | 0 | 0 |
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.










