Big Bay Surf Break

Lat Long: 33.79° S 18.46° E

Big Bay Surf Forecast and Surf Report

Issued: 1 pm 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Big Bay sea temperature is
14.0° C
1.5° 

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 23 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 8,596 kJ wave energy.
  • Next surfable swell (1★+): Thursday 23 Jul, 5PM (local time) - 7ft (2.1m), 11s 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 Thursday (Jul 23) at 5PM. The primary swell is predicted to be 2.1m and 11s period with a secondary swell of 0.8m and 20s. 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 17s and forecast to arrive on Thursday (Jul 23) 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 Monday (Jul 27) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Thu 23rd Jul)7ft (2.1m) 11s
Best Surf11PM (Thu 23rd Jul)13ft (4.0m) 17s
Most Powerful11PM (Thu 23rd Jul)13ft (4.0m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it. We’ve got a solid run of SW swell lining up for Big Bay, starting this Thursday afternoon and stretching well into the first week of August. The water is sitting at 57°, which is a bit colder than normal for this time of year, so you might want an extra layer if you’re spending a long session out there.

The first pulse arrives Thursday afternoon with a 7ft SW swell at 11 seconds. It’s got some serious energy behind it (1678), and with a light cross-off breeze from the ENE, it’s going to be clean and powerful. This is definitely one for the experienced crew – that kind of size and period will be pushing hard on the bank.

Friday morning is the real standout of the first week. We’re looking at an 12ft SW groundswell with a 14-second period, pumping out massive energy (4362). The wind is glassy from the ESE, which means it’s going to be absolutely pristine. This is big, powerful surf – definitely not for the faint-hearted. Only experts should be out there. If you’ve got the skills, this is your window.

The swell holds through Saturday and Sunday with clean 7ft to 8ft SW swell, light offshore and glassy conditions on the mornings. Consistency is good, and the energy stays solid. The week closes out with lighter 6ft to 6ft SW swell on Wednesday, still clean, but the power starts to drop.

There’s a rough patch on Monday and Tuesday of that first week, with strong southerly winds cranking up to 28 mph on Monday afternoon. That’s going to trash the surface – the ocean will be a mess. It’s worth sitting those days out unless you’re kiting, because the swell is there but the wind will make it hopeless for paddling.

After a small lull on the 30th and 31st with smaller 4ft to 4ft waves, we get another nice pulse on the 1st of August. That Saturday brings 5ft SW swell, clean conditions, and glassy afternoon winds. It’s a great option for the weekend warriors.

Then, mark your calendar for Monday the 3rd of August. We’ve got a 5ft WSW groundswell with a very long 16-second period, flat calm glassy conditions, and energy reading 1361. The period is so long it’ll be better for the point or reef setup at Big Bay – the waves will have deep, pushing lines with plenty of time between sets. This is a beauty for experienced surfers who want clean, powerful waves without the brutal size of the previous week.

The swell fades again after that, with some onshore wind and chop from the 4th through the 6th, but there’s a final flicker of goodness on Friday the 7th with a clean 6ft SW swell at 14 seconds. It’s a solid way to close out the forecast period.

Crowds are likely at Big Bay, especially on the standouts, but the quality will be worth the company. If you’re after the best, hit Friday morning the 24th for the biggest, cleanest swell, or Monday the 3rd for the long-period perfection.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sun morning, min 12°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 21°C on Sun afternoon, min 11°C on Tue night). Winds increasing (light winds from the SW on Sun afternoon, strong winds from the SSE by Mon afternoon).

Thu
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
9
5
4
4
4
4
4
4
4
3
2
0
4
1
2
4
4
4
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
11
4
SW
16
3.5
SW
14
3
SW
14
2.5
SW
13
2.1
SW
13
2.5
SW
12
2.3
SW
12
2
SW
11
1.9
SW
12
1.5
SW
13
2.1
SW
12
3.5
SSW
14
3.5
SSW
16
2.4
SW
15
2.3
SW
14
2
SW
14
1.8
SW
13
1.7
SW
13
1.6
SW
13
Wave Graph
Metric surfscale
Energy kJ
1107
8075
4362
3536
2158
1429
1789
1539
1004
1007
732
1169
4944
5693
2424
2171
1429
1083
996
803
Wind (km/h)
5
ENE
5
SE
5
ESE
10
SSW
10
SE
10
ESE
10
S
10
ESE
5
E
10
S
20
S
30
SSE
45
SSE
35
SE
35
SE
30
SE
15
ESE
10
SE
5
SSE
10
E
Wind State
cross-off
cross-off
glassy
cross
cross-off
off
cross-off
off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
High Tide
11:05PM1.08m
12:11PM1.02m
00:19AM1.11m
1:10PM1.09m
1:14AM1.17m
1:53PM1.18m
1:56AM1.25m
2:29PM1.27m
2:33AM1.32m
3:02PM1.36m
3:06AM1.38m
3:33PM1.43m
3:38AM1.41m
Low Tide
4:48PM0.64m
5:57AM0.53m
6:16PM0.61m
6:58AM0.46m
7:16PM0.54m
7:43AM0.38m
7:59PM0.45m
8:20AM0.30m
8:36PM0.38m
8:52AM0.23m
9:09PM0.31m
9:22AM0.17m
9:40PM0.25m
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:43
7:43
7:43
7:41
7:41
7:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:00
6:01
6:02
6:02
6:04
 mm
3
Temp °C
13
13
13
14
13
15
18
17
19
21
15
16
16
13
14
16
13
13
17
15
Feels °C
10
11
12
12
10
13
16
15
17
18
13
10
9
5
7
10
9
11
15
13
  • 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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