Big Bay Surf Break

Big Bay Surf Forecast and Surf Report

Lat Long: 33.79° S 18.46° E

Issued: 1 am 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Big Bay sea temperature is
13.5° C

2.1°C colder than average for this time of year

Big Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Big Bay surf forecast from 6 Jul 2026:

  • Best quality surf: Friday 10 Jul, 2AM (local time) - 10ft (3.0m), 13s period, SSW swell with offshore winds.
  • Most powerful swell: Wednesday 8 Jul, 11PM (local time) - 8ft (2.5m), 15s period, SW swell with 3,228 kJ wave energy.
  • Next surfable swell (1★+): Monday 6 Jul, 8AM (local time) - 7ft (2.2m), 11s period with WSW 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 Monday (Jul 06) at 8AM. The primary swell is predicted to be 2.2m and 11s period with a secondary swell of 0.1m and 12s. 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 2.5m 15s and forecast to arrive on Wednesday (Jul 08) 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 5s period and expected on Thursday (Jul 09) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 6th Jul)7ft (2.2m) 11s
Best Surf 2AM (Fri 10th Jul)10ft (3.0m) 13s
Most Powerful11PM (Wed 8th Jul)8ft (2.5m) 15s

Table - best surf conditions forecast for Big Bay over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here. Let’s cut right through it. For the next couple of weeks, Big Bay is looking at a proper run of solid winter groundswell, with some days of pure class and a few that are strictly for the experienced crew. The water is sitting at 56°F which is over three and a half degrees colder than usual for this time of year, so you’ll feel that bite.

The action kicks off Monday the 6th of July. Monday morning is glassy, with a clean 7ft swell from the WSW and a period of 11 seconds. The combined energy is a meaty 1226, and with just a whisper of ENE air, it’ll be clean as a whistle. That afternoon, the swell drops a fraction to 5ft but stays glassy with offshore wind. It’s excellent, but this is solid size for an intermediate – the 7ft morning sets will have some punch.

Tuesday the 7th is another beauty. Morning glass, 6ft SW swell at 12 seconds, and by the afternoon it’s pumping up to 7ft SW with a 13-second period. That’s proper groundswell, and the combined energy jumps to 1719. The wind goes glassy again in the afternoon. This is the pick of the early week – consistent, powerful, and clean.

Wednesday the 8th holds the goods. Morning glass again with 7ft SW at 13 seconds and a combined energy of 2316. The afternoon brings a few clouds and a light cross-off breeze, but it’s still clean. This is big, raw energy, not for the faint-hearted.

Thursday the 9th sees the swell peak. Morning is 8ft SW at 14 seconds and a huge combined energy of 2609. The wind is a moderate cross-off from the SSE, so it’s clean but powerful. The afternoon pushes 10ft. This is expert territory only – too big for beginners, and even for most intermediates. The period is long, so expect long lulls between big sets, but the shape will be excellent if you’re on a point or reef setup.

Friday the 10th stays solid with 10ft SSW in the morning, a gentle offshore from the SE, and a combined energy of 2604. The afternoon drops to 8ft but stays clean. This is still big, powerful surf.

Saturday the 11th is a step down to 7ft SSW at 12 seconds, with light cross-off winds and a combined energy of 1697. Still very good, but the crowds could be an issue – this spot is often busy, and with this run of quality, it’ll be popular.

Sunday the 12th is a bit of a reset. Morning is glassy with a 5ft S swell, period 11 seconds, and energy down to 798. It’s a nice, clean, more manageable size. The afternoon gets messy with cross-on wind. After this, things go quiet for a few days. From Sunday afternoon through to Wednesday the 15th, the swell drops below 3ft and the winds turn unfavourable. It’s a real gap in quality – nothing worth paddling out for.

Thursday the 16th brings the next pulse. Morning glass, 6ft SW at 12 seconds, combined energy 1098. Clean and solid. Friday the 17th is bigger again at 7ft SW, but with onshore wind, so it’ll be a bit lumpy. That’s a caveat – the period is long at 12 seconds, so the energy is there, but the wind will chop it up.

Saturday the 18th sees a moderate cross-off breeze with 5ft to 6ft WSW swell. Clean, but the wind is stiffer at 12 mph. Still rideable for the experienced.

The standout for the second week is Sunday the 19th. Morning brings 7ft WSW at 13 seconds with a light offshore from the ESE, combined energy 1498. Then the afternoon goes glassy, 6ft WSW at 12 seconds, combined energy 1172. That’s a full day of clean, long-period groundswell with perfect conditions. This is the best of the second week, no doubt.

Monday the 20th eases off, and Tuesday the 21st has a glassy morning with 4ft WSW at 12 seconds – a nice, clean, smaller option for the less experienced.

Overall, the first week is stacked with powerful, clean groundswell. Run early, bring the right board, and don’t expect it to be empty. The second week has a couple of gems, particularly the Sunday the 19th.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Mon afternoon, min 13°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Fri afternoon, min 10°C on Thu night). Wind will be generally light.

Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
4
4
4
4
4
4
4
3
3
5
4
4
4
4
3
4
3
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
WSW
11
1.6
WSW
11
1.8
SW
13
1.9
SW
12
2.2
SW
13
2.4
SW
13
2.2
SW
13
2
SW
13
2.5
SW
15
2.5
SW
14
3
SSW
13
3
SSW
13
3
SSW
13
2.5
SSW
13
2.1
SSW
12
2.1
SSW
12
2
SSW
12
1.7
SSW
11
1.5
S
11
1.1
SSW
10
1.5
SSW
13
Wave Graph
Metric surfscale
Energy kJ
1183
645
1075
1065
1534
1846
1535
1305
3068
2609
2598
2887
2588
2366
1237
1289
1072
750
535
246
703
Wind (km/h)
5
ENE
5
SW
0
N
5
N
5
SW
5
SSW
5
SSW
10
SSW
20
SSE
20
SSE
20
SSE
15
SE
15
SE
10
SSE
10
ESE
5
SSE
10
SSW
10
ESE
5
NE
10
WSW
5
N
Wind State
glassy
glassy
glassy
glassy
glassy
glassy
glassy
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
cross-off
cross
off
glassy
cross-on
glassy
High Tide
7:27PM1.34m
7:53AM1.14m
8:20PM1.31m
9:01AM1.10m
9:26PM1.29m
10:21AM1.10m
10:42PM1.29m
11:40AM1.15m
11:57PM1.34m
12:49PM1.25m
1:03AM1.41m
1:48PM1.36m
2:02AM1.49m
Low Tide
12:59PM0.35m
1:48AM0.38m
1:49PM0.41m
2:50AM0.40m
2:52PM0.47m
4:03AM0.39m
4:12PM0.49m
5:22AM0.34m
5:37PM0.45m
6:34AM0.26m
6:51PM0.37m
7:34AM0.17m
7:53PM0.26m
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
cloud
cloud
cloud
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:50
7:50
7:50
7:50
7:50
7:50
7:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:50
5:50
5:51
5:51
5:52
5:52
5:52
 mm
Temp °C
16
18
16
16
17
16
16
17
14
13
14
13
12
16
15
14
16
14
14
16
14
Feels °C
16
18
16
16
16
16
16
16
11
9
10
10
9
13
12
13
15
12
13
15
13
Swell 1
Height (m)
Direction
Period (s)
2.2
WSW
11
1.6
WSW
11
1.8
SW
13
1.9
SW
12
2.2
SW
13
2.4
SW
13
2.2
SW
13
2
SW
13
2.5
SW
15
2.5
SW
14
3
SSW
13
3
SSW
13
3
SSW
13
2.5
SSW
13
2.1
SSW
12
2.1
SSW
12
2
SSW
12
1.7
SSW
11
1.5
S
11
1.1
SSW
10
1.5
SSW
13
Energy kJ
1183
645
1075
1065
1534
1846
1535
1305
3068
2609
2598
2887
2588
2366
1237
1289
1072
750
535
246
703
Swell 2
Height (m)
Direction
Period (s)
0.3
SW
16
1.4
SW
12
1.2
W
11
1.1
W
11
0.7
W
11
0.5
SW
20
1.1
SW
18
1.4
SW
16
0.5
S
11
1.6
SW
13
0.2
W
14
0.3
W
12
1.3
S
8
0.6
W
11
0.6
W
11
0.6
W
11
0.6
W
11
0.5
W
10
0.5
W
10
Energy kJ
43
580
357
282
112
188
781
1039
66
821
16
27
217
87
88
88
83
52
48
Swell 3
Height (m)
Direction
Period (s)
0.5
SW
11
0.1
SW
23
0.3
SW
22
0.5
W
11
0.1
SW
20
0.1
SW
18
0.1
SW
18
0.3
SSW
14
0.5
S
14
0.3
SW
15
Energy kJ
58
21
73
64
15
12
12
40
94
34
Wind waves
Height (m)
Direction
Period (s)
1.8
SSE
7
1.7
SSE
8
1.6
SSE
8
1.7
SSE
8
1.4
SSE
7
1.3
SSE
6
1.1
SSE
6
0.9
SSE
7
Energy kJ
316
310
306
302
175
140
101
68
Nearest Offshore or Glassy
Rating
(10 max)
4
4
4
4
4
4
4
4
5
4
4
5
4
4
4
4
4
4
3
3
3
Distance (km)
0
0
0
0
0
0
0
0
14
0
14
0
0
0
0
0
0
0
0
34
0
Best forecast wave conditions in Cape Town
Rating
(10 max)
4
4
4
4
4
4
4
4
5
4
4
5
4
4
4
4
4
4
3
3
3
Best forecast wave conditions in South Africa
Rating
(10 max)
4
4
4
4
4
4
4
4
6
4
5
5
5
4
4
4
4
4
4
4
5
Header Global
Rating
(10 max)
6
7
8
7
5
5
9
6
9
9
5
6
5
4
5
5
4
5
4
4
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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