
Surf Forecasts:
Big Bay surf forecast from 10 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 4,277 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 2AM (local time) - 7ft (2.1m), 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 2AM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 1.0m and 7s. Another secondary swell of 1.4m and 7s is also forecast. The wind is predicted to be 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 cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Jul 17) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 11th Jul) | 7ft (2.1m) 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.
G’day, I’m Rusty. We’ve got a solid run of swell headed our way at Big Bay. The first week is mixed, but once we get into deeper water, things really fire up. The standout period is undeniable, but you’ll need to be ready for some serious size.
We kick off on Saturday, July 11th, with a good start. The morning sees a clean 7ft SSW swell, period 12 seconds, and an offshore breeze. The combined wave energy is strong (1565). This is excellent for experienced surfers. The afternoon drops to 6ft, still clean and cross-off, with strong energy (1243). Sunday morning, July 12th, is still decent with a 5ft SSW swell, period 11 seconds, and light offshore wind. The energy drops to moderate (698). The afternoon gets a bit messy with a cross-shore breeze, turning the 4ft SSW swell into a light chop.
Monday, July 13th, offers a real treat for the smaller wave aficionados. The morning is glassy, with a 3ft SSW swell, 10-second period, and weak energy (271). The afternoon stays glassy with a 3ft swell. Perfect for a longboard. Tuesday, July 14th, is a write-off with onshore wind and weak, short-period swell.
Now, Wednesday, July 15th, is where things get interesting. The morning brings a clean 6ft SW swell, 11-second period, and glassy conditions. Energy is strong (1086). This is excellent for experienced surfers. But the afternoon is a true standout. The swell jumps to 10ft from the SW, with a very long period of 15 seconds. The wind is light and cross-off, and the combined energy is very strong (3572). This is an excellent session for experts only. Thursday, July 16th, keeps the size with a 10ft SW swell, long period of 13 seconds, and strong energy (2795), but the wind picks up and the quality drops. The afternoon has an 8ft swell with a moderate cross-off breeze, still strong energy (2140).
Friday, July 17th, is back on. The morning has a clean 8ft SW swell, 11-second period, with a moderate offshore breeze. Energy is strong (1317). The afternoon is a touch smaller at 7ft, but still clean. Saturday, July 18th, is another good one. The morning is clean with a 5ft SSW swell, 12-second period, and weak offshore wind. Energy is strong (1194). The afternoon gets a bit wonky with a cross-on breeze. Sunday, July 19th, is a drop-off with a small, onshore, cross-shore W swell.
Monday, July 20th, and Tuesday, July 21st, are small, but Tuesday afternoon is a nice surprise. It brings a 4ft SSW swell, a very long period of 16 seconds, and clean conditions. Energy is strong (1092). This is excellent for experienced surfers. Wednesday, July 22nd, and Thursday, July 23rd, are messy with onshore and cross-shore winds, although Thursday morning has a 7ft SSW swell with a very long 15-second period, but the cross-chop will make it difficult.
Now, the absolute highlight is Friday, July 24th. The morning is a dream. A 13ft SW swell, with a very long period of 19 seconds, and glassy conditions. The combined energy is exceptional (11023). This is an elite session for expert surfers only. The afternoon is still huge at 12ft, but a cross-shore wind will create some bumps. Saturday, July 25th, is still massive. The morning is clean with a 10ft SW swell, 16-second period, and strong energy (4864). The afternoon is a 13ft WSW swell, but the cross-shore breeze will take the edge off. Sunday, July 26th, keeps the huge 13ft SW swell, but the wind is cross-onshore, making it look more interesting for kite surfing than paddle surfing.
The water temperature is about average for the time of year.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed morning. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Fri 17 | |||||||||||||||
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 12 | SSW 12 | SSW 12 | SSW 12 | SSW 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 | SW 11 | SW 11 |
Wave Graph | |||||||||||||||||||||
1258 | 1310 | 833 | 814 | 561 | 392 | 260 | 173 | 120 | 216 | 164 | 153 | 132 | 639 | 3513 | 4034 | 2795 | 2140 | 1446 | 1317 | 963 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | off | off | cross | cross-off | glassy | glassy | cross-off | cross-on | on | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
High Tide | 11:57PM1.34m | 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 | 6:34AM0.26m | 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 | ||||||||
— | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | |
5:52 | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 18 | 16 | 15 | 18 | 17 | 16 | 17 | 15 | 15 | 16 | 14 | 13 | 14 | 14 | 13 | 14 | 13 | 12 | 17 |
Feels °C | 11 | 12 | 16 | 14 | 13 | 16 | 15 | 15 | 15 | 14 | 13 | 14 | 13 | 11 | 12 | 12 | 11 | 10 | 9 | 8 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 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 | SW 11 | SW 11 |
1258 | 1310 | 833 | 814 | 561 | 392 | 260 | 173 | 120 | 216 | 164 | 153 | 132 | 639 | 3513 | 4034 | 2795 | 2140 | 1446 | 1317 | 963 | |
Swell 2 Height (m) Direction Period (s) | S 7 | W 11 | SW 12 | W 11 | W 11 | W 11 | W 10 | W 10 | W 9 | SSW 9 | SW 13 | SW 12 | WSW 4 | SW 16 | W 9 | — | — | — | — | — | W 19 |
103 | 116 | 244 | 163 | 112 | 110 | 69 | 66 | 40 | 90 | 60 | 55 | 8 | 367 | 59 | — | — | — | — | — | 7 | |
Swell 3 Height (m) Direction Period (s) | W 12 | W 19 | W 12 | SW 18 | WSW 16 | SW 15 | SW 15 | SW 14 | WSW 12 | SW 13 | SSE 9 | S 9 | SW 18 | W 9 | — | — | — | — | — | — | W 20 |
136 | 7 | 166 | 12 | 25 | 37 | 33 | 32 | 50 | 61 | 27 | 24 | 108 | 80 | — | — | — | — | — | — | 7 | |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 7 | — | — | — | — | — | — | — | — | — | WNW 3 | NNW 3 | — | — | — | — | — | — | — | S 4 |
171 | 132 | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | 31 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 29 | 2 | 0 | 0 | 0 | 50 | 34 | 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.











