Big Bay Surf Break

Lat Long: 33.79° S 18.46° E

Big Bay Surf Forecast and Surf Report

Issued: 7 am 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Big Bay sea temperature is
14.4° C
1.2° 

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 9 Jul 2026:

  • Best quality surf: Friday 10 Jul, 2AM (local time) - 10ft (3.0m), 13s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 16 Jul, 5AM (local time) - 8ft (2.5m), 14s period, WSW swell with 2,760 kJ wave energy.
  • Next surfable swell (1★+): Thursday 9 Jul, 11PM (local time) - 8ft (2.5m), 13s 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 Thursday (Jul 09) at 11PM. 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 2.5m 14s and forecast to arrive on Thursday (Jul 16) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Jul 09) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 9th Jul)8ft (2.5m) 13s
Best Surf 2AM (Fri 10th Jul)10ft (3.0m) 13s
Most Powerful 5AM (Thu 16th Jul)8ft (2.5m) 14s

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


Alright, Rusty here. Let’s take a look at what’s on the menu for Big Bay over the next couple of weeks.

Right now, we’ve got a pretty solid run of surf kicking off this Thursday morning. The water’s sitting at 58°, which is a bit colder than usual for this time of year – you’ll want a good 4/3, maybe booties if you run cold.

The opening act is Thursday the 9th with some good, clean, powerful swell. We’re looking at a 10ft SW groundswell with a 14-second period. The wave energy is strong, reading 2847. The wind is a gentle cross-offshore breeze, so faces will be lined up nicely. This is big, proper swell though – at 10ft, this is really only for the experienced crew. Beginners should sit this one out.

Friday the 10th stays solid. Still an 8ft SSW swell, period dropping a touch to 13 seconds, but the morning brings a clean offshore wind. The combined energy is still strong at 2246. Quality surfing for those who can handle it.

Saturday the 11th sees the size drop back to a 7ft SSW swell with clean offshore wind in the morning and light cross-off in the afternoon. Still good grunt in the water, energy at 1356. This is the best window for a strong intermediate surfer to get amongst it.

Sunday the 12th starts a taper. Morning is 5ft with clean offshore breeze, energy down to 665. Good waves for a solid shortboard, but by the afternoon the swell drops to 4ft and the wind goes cross-shore, making it a bit average. Not the pick of the week.

Monday and Tuesday the 13th and 14th go very small – under 3ft with glassy conditions. Fun for a longboard or a foiler, but no real power.

Now, here’s where it gets interesting. Wednesday the 15th has a sneaky pulse. The morning is tiny at 3ft, but the afternoon bumps up to 6ft from the WSW with a very long 16-second period and glassy conditions. The wave energy jumps to 1641. This is a standout session for the intermediate crowd – clean, long lines, and that period means real push.

Thursday the 16th gets bigger again, 8ft, but the wind turns onshore and then cross-on. The size is there, but the quality takes a hit. Only for the determined.

Friday the 17th is a write-off with fresh 35 km/h winds and messy conditions.

The real highlight? Look at Sunday the 19th and Monday the 20th. Sunday kicks off with an 12ft W swell, 13-second period, and a gentle offshore wind. Energy is massive at 3913. Monday is similar, 10ft SSW, clean offshores, energy at 3175. This is big, powerful, open-ocean swell. Expert surfers only. The combination of size, wind, and direction pointing into the SW optimum swell window for Big Bay makes this the best on offer in the whole forecast. It’s a week and a half out, so keep an eye on it, but if it holds – game on.

There is a gap of small, weaker surf after Thursday the 16th until Friday the 18th, but that Sunday more than makes up for it.

In summary: The best window is the run from Sunday the 19th into Tuesday the 21st for experienced surfers, with Saturday the 11th also a solid, more manageable day. Keep the glassy Wednesday the 15th afternoon on your radar too.

Stay stoked, Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Sun afternoon, min 14°C on Mon night). Wind will be generally light.

Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
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
5
4
4
4
4
4
3
3
1
2
2
1
2
2
2
2
3
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
SW
14
3
SSW
13
3
SSW
13
2.5
SSW
13
2.5
SSW
13
2.3
SSW
12
2
SSW
12
1.6
SSW
12
1.7
SSW
11
1.5
SSW
11
1.2
SSW
11
1
SSW
10
0.9
SSW
10
0.8
SSW
10
0.9
W
10
1
W
10
0.9
W
10
0.9
W
9
0.9
WSW
16
1.7
WSW
16
2.5
WSW
14
Wave Graph
Metric surfscale
Energy kJ
2847
2598
2713
2230
1989
1548
1197
743
716
494
337
218
173
120
174
202
154
140
436
1487
2618
Wind (km/h)
15
SSE
20
SSE
15
SE
15
SE
15
SSE
10
ESE
10
ESE
10
S
10
E
5
E
5
SSW
5
ENE
5
ENE
5
SW
5
NE
0
W
5
SW
5
ENE
0
SE
5
WSW
5
SW
Wind State
cross-off
cross-off
cross-off
off
cross-off
off
off
cross-off
off
off
cross
glassy
glassy
cross-on
glassy
glassy
glassy
glassy
glassy
glassy
glassy
High Tide
10:21AM1.10m
10:42PM1.29m
11:40AM1.15m
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
Low Tide
4:12PM0.49m
5:22AM0.34m
5:37PM0.45m
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
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:50
7:50
7:50
7:50
7:48
7:48
7:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:52
5:53
5:53
5:54
 mm
Temp °C
13
14
12
13
15
14
13
17
16
16
18
17
16
18
16
15
16
15
15
17
16
Feels °C
10
10
8
10
12
11
11
15
14
14
17
15
15
17
15
14
14
14
15
16
16
  • 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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