
Surf Forecasts:
Big Bay surf forecast from 12 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 15 Jul, 11PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,953 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 11PM (local time) - 3.5ft (1.1m), 10s 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 Sunday (Jul 12) at 11PM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.7m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Bay in the next 16 days are 3.0m 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 0.5m 3s period and expected on Sunday (Jul 19) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 12th Jul) | 3.5ft (1.1m) 10s |
| Best Surf | 8PM (Wed 15th Jul) | 10ft (3.0m) 14s |
| Most Powerful | 11PM (Wed 15th Jul) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Big Bay over the next 16 days.
Alright folks, Rusty here. Let’s take a look at what Big Bay has cooking for us over the next couple of weeks.
We’ve got a slow start, but patience is going to pay off big time. The first couple of days are pretty flat and not worth paddling out for, but don’t let that fool you – this stretch has some serious firepower coming our way.
Monday the 13th is dead calm with glassy conditions, but the swell is tiny at 3 ft, so it’s more of a lake paddle than a surf. The combined energy is weak (271), so save your energy.
The real story starts to build on Wednesday the 15th. That morning, the wind goes glassy, and we see a nice 5 ft groundswell out of the SW with a long 16-second period. The energy jumps to 1343 (moderate), and it’s clean – this is the first real standout. It’s a bit punchy for beginners, but for intermediates, this is a sweet spot. By the afternoon, the swell jumps to 8 ft, but it gets a bit cross-onshore and messy, so the morning is your window.
Thursday the 16th keeps the energy up. Morning glass again with a solid 8 ft SW groundswell at 13 seconds. The combined energy is strong (2381), and the conditions are excellent for experienced surfers. This is another top pick – just be aware it’s big enough to be expert-only.
After a bit of a lull, Saturday the 18th offers a nice reprieve. The swell drops to 4 ft from the S and SW, period 12 seconds, and both morning and afternoon are glassy. The energy is moderate (588-770). This is a great day for the less experienced crowd or anyone wanting a fun, mellow session.
Now, the big one. Tuesday the 21st. Morning glass with a 10 ft SW groundswell at a very long 16 seconds. The combined energy is a massive 4682 – that’s strong to very strong. The wind is offshore and clean. This is the best session of the whole outlook. It’s a groundswell, so expect long, powerful lines and longer waits between sets. Perfect for a point or reef, but at a beach break it might be a bit straight. Only for experts at this size.
We get a couple of days of choppy, onshore junk, then Thursday the 23rd morning sees a massive 15 ft SW swell, but the file tells us it’s just too big for this break. The afternoon, however, glassy conditions return with a 8 ft SSW swell – excellent for experienced surfers again.
The end of the run, from Saturday the 25th into Sunday the 26th, is just churning out huge, 15 ft to 16 ft SW swells. The energy numbers are through the roof (12042 to 12073), but again, it’s too big for Big Bay. The wind is clean and cross-off, so it’s blowing out, but this kind of setup is actually more interesting for kite surfing than paddle surfing. Too gnarly for a board.
The very last day, Tuesday the 28th, brings it back down. A 7 ft SW groundswell at 13 seconds, glassy, with excellent conditions. A solid finisher for the more experienced crew.
The water temperature is about average for the time of year, so no surprises there.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Sun night, min 14°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Sat afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sun 19 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 10 | W 12 | W 10 | W 10 | W 9 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 11 | SSW 10 | S 12 | SW 12 | WSW 13 | WSW 12 | WSW 11 |
Wave Graph | |||||||||||||||||||||
260 | 173 | 132 | 220 | 165 | 156 | 132 | 1097 | 2906 | 3752 | 2381 | 1697 | 1358 | 981 | 759 | 346 | 333 | 346 | 1524 | 1099 | 845 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | cross-on | on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | cross-off | cross-off | off | glassy | glassy | cross-on | cross | cross-on |
High Tide | 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 | 5:55AM1.39m | 6:19PM1.52m | 6:38AM1.28m | 7:01PM1.42m | |||||||
Low Tide | 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 | 12:00PM0.16m | 00:39AM0.23m | 12:39PM0.27m | ||||||||
— | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:47 | — | — | 7:47 | — | |
5:52 | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 16 | 15 | 15 | 16 | 14 | 15 | 16 | 15 | 15 | 17 | 16 | 15 | 15 | 14 | 16 | 20 | 19 | 17 | 19 |
Feels °C | 15 | 14 | 14 | 14 | 14 | 15 | 13 | 15 | 16 | 15 | 15 | 16 | 17 | 12 | 12 | 12 | 15 | 20 | 19 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 10 | W 12 | W 10 | W 10 | W 9 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 11 | SSW 10 | S 12 | SW 12 | WSW 13 | WSW 12 | WSW 11 |
260 | 173 | 132 | 220 | 165 | 156 | 132 | 1097 | 2906 | 3752 | 2381 | 1697 | 1358 | 981 | 759 | 346 | 333 | 346 | 1524 | 1099 | 845 | |
Swell 2 Height (m) Direction Period (s) | W 10 | W 10 | W 9 | SSW 9 | SW 13 | SW 12 | SW 18 | W 9 | SW 10 | — | — | — | — | — | S 14 | WSW 10 | WSW 10 | S 11 | S 11 | S 11 | SSE 11 |
69 | 66 | 40 | 90 | 59 | 55 | 109 | 104 | 185 | — | — | — | — | — | 37 | 169 | 170 | 237 | 119 | 58 | 38 | |
Swell 3 Height (m) Direction Period (s) | SW 15 | SW 14 | WSW 12 | SW 13 | S 9 | S 9 | SW 12 | SW 11 | W 9 | — | — | — | — | — | — | S 13 | SW 9 | WSW 11 | — | — | SSW 15 |
33 | 32 | 51 | 45 | 25 | 25 | 52 | 142 | 76 | — | — | — | — | — | — | 119 | 85 | 187 | — | — | 42 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 4 | 20 | 0 | 0 | 10 | 0 | 0 | 29 | 0 | 15 | 14 | 0 | 0 | 0 | 2 | 2 | 29 |
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.











