Big Bay Surf Break

Lat Long: 33.79° S 18.46° E

Big Bay Surf Forecast and Surf Report

Issued: 7 am 21 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 21 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with offshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 9,317 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 8PM (local time) - 8ft (2.5m), 13s 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 Tuesday (Jul 21) at 8PM. The primary swell is predicted to be 2.5m and 13s period. 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 offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Jul 27) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Tue 21st Jul)8ft (2.5m) 13s
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, Rusty here. Let’s talk about what’s coming up for Big Bay.

We’ve got a solid run of surf on the way, but it’s not all smooth sailing. The first real action kicks off on Tuesday morning, the 21st of July. The water is sitting at 57°, which is a bit colder than normal for this time of year, so you’ll want a decent wetsuit.

Tuesday morning is the first standout. It’s glassy, with a clean 7ft SW swell and a solid 14-second period. The energy is pumping with a reading of 1946 (moderate wave energy). This is excellent for experienced surfers, but with that size and power, it’s not one for beginners. The wind is calm, so expect some really clean, lined-up sets.

From Tuesday afternoon through to Thursday, things get a bit messy. The wind switches around and kicks up some chop, and the wave quality drops off. The swell hangs in there, but the conditions are marginal. It’s worth sitting out these days unless you’re desperate.

Then we hit the real highlight of the outlook. Friday morning, the 24th of July, is the best on offer. That’s an 12ft SW groundswell with a very long 15-second period, and the combined energy is a massive 4815 (strong wave energy). The wind is glassy again. This is a big, powerful swell. For a point break or reef, this would be a dream, but at a beach break like Big Bay, that long period can make it break a bit straight. Still, for experienced surfers, this is a special session. The afternoon stays clean with a cross-offshore breeze.

The weekend of the 25th and 26th keeps the quality high. Saturday morning is clean with offshore wind and an 8ft SW swell. Sunday morning is another glassy moment, with a 7ft SW swell. Both days are excellent for experienced surfers, and the crowds are likely at Big Bay, so get there early.

Monday the 27th sees the wind pick up, and by Tuesday the 28th, a strong breeze makes it a write-off for surfing, despite more big swell. That setup looks more interesting for kite surfing than paddle surfing.

We get a bit of a breather, but then Wednesday the 29th morning brings back clean conditions with a 10ft SW swell and offshore wind. Another good one for the experienced crew.

The first week of August drops off hard. The wind is onshore and strong, the swell gets smaller and from the south, and the scores are poor. There’s a gap of poor surf from the 2nd to the 3rd of August.

Things start to look up again on Tuesday the 4th of August, with a clean afternoon showing a 6ft WSW swell and cross-offshore wind. Then Wednesday the 5th morning is clean with offshore wind and a 5ft WSW swell, good for a wider range of surfers.

Overall, the standout is that Friday morning, the 24th of July. Don’t miss it.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 14°C on Tue afternoon, min 10°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Sat afternoon, min 12°C on Fri morning). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
3
4
3
2
2
2
3
9
5
5
4
4
4
4
4
4
2
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
SW
14
2.5
SW
13
2.3
SW
13
2.1
SW
12
1.9
SW
12
1.7
WSW
12
2
SW
11
2.3
SW
11
4
SW
16
3.5
SW
15
3
SW
14
2.5
SW
13
2.5
SW
13
2.4
SW
12
2.1
SW
12
2.1
SW
12
2.1
SW
12
1.7
WSW
11
1.2
WSW
12
2.5
SSW
14
3
SSW
16
Wave Graph
Metric surfscale
Energy kJ
1895
2310
1724
1298
1048
861
901
1279
8055
4815
3936
2412
2187
1749
1200
1193
1111
669
412
2698
4821
Wind (km/h)
0
ENE
10
SSW
5
SSW
10
NW
10
NW
15
NNE
20
N
5
NNE
5
ESE
5
SE
10
S
10
SE
10
ESE
10
SSE
10
ENE
0
WNW
15
SSE
20
SSE
25
SSE
40
SSE
30
SE
Wind State
glassy
cross
glassy
on
cross-on
cross
cross
cross
off
glassy
cross-off
off
off
cross-off
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
8:15AM1.07m
8:37PM1.19m
9:22AM1.00m
9:43PM1.11m
10:48AM0.98m
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
Low Tide
2:09PM0.51m
3:14AM0.51m
3:14PM0.60m
4:34AM0.55m
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
clear
clear
part cloud
clear
clear
clear
rain showers
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:46
7:45
7:45
7:43
7:43
7:43
7:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:59
6:00
6:00
6:00
6:01
6:02
 mm
1
1
Temp °C
13
14
13
13
14
13
11
13
13
13
15
14
16
21
20
20
18
14
16
17
14
Feels °C
13
12
12
11
11
11
6
10
12
12
13
12
14
19
18
19
16
12
12
11
7
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Big Bay:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Big Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest