Big Bay Surf Break

Lat Long: 33.79° S 18.46° E

Big Bay Surf Forecast and Surf Report

Issued: 1 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Bay sea temperature is
13.0° C
2.4° 

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 2 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 8AM (local time) - 10ft (3.0m), 13s period, WSW swell with glassy winds.
  • Most powerful swell: Thursday 6 Aug, 2AM (local time) - 11ft (3.5m), 14s period, WSW swell with 4,376 kJ wave energy.
  • Next surfable swell (1★+): Sunday 2 Aug, 5PM (local time) - 4ft (1.2m), 12s 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 Sunday (Aug 02) at 5PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.5m and 16s. 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 3.5m 14s and forecast to arrive on Thursday (Aug 06) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Aug 09) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Sun 2nd Aug)4ft (1.2m) 12s
Best Surf 8AM (Thu 6th Aug)10ft (3.0m) 13s
Most Powerful 2AM (Thu 6th Aug)11ft (3.5m) 14s

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


The Lowdown

Alright folks, Rusty here. Let's talk about what's coming up at Big Bay.

First up, the water is sitting at 55.4°F which is a solid 4.3°F colder than usual for this time of year. That's a noticeable chill, so you'll want a good wetsuit.

The week starts pretty lazy. Sunday morning the 2nd is a bit of a non-starter with a weak 3.9ft SW swell and a light cross breeze. Not worth paddling out for. By Sunday afternoon, though, the wind goes completely glassy and the swell holds at 3.9ft from the SW with a period of 12 seconds. The energy is still moderate (566), but with those clean conditions, it's a nice little session if you're keen. Monday the 3rd morning is very similar, glassy with a clean 4.6ft SW swell. Afternoon gets a bit cross, so the mornings are the go.

We’ve got a bit of a quiet patch Tuesday and Wednesday where the wind is messy or the surf is small and choppy. Not worth writing home about. But hold onto your board – Thursday the 6th is where it starts to get interesting. A solid 9.8ft SW groundswell rolls in with a 13-second period, and the wind is light and cross-off. This is excellent, powerful surf for experienced surfers. The energy is ramping up to strong (3056). Friday the 7th morning is the absolute standout of the first week. It’s a clean 9.8ft SW swell with a 14-second period and offshore winds. The energy is pumping (3201). This is top-tier Big Bay. Friday afternoon gets a bit cross-on, so get out early.

The weekend days (Saturday 8th) see onshore winds and a swampy 11.5ft SW swell that's just too big and messy for most. Sunday the 9th is a write-off with rain showers and strong cross-on wind. This is more of a kite-surfing setup than a paddle-surfing one.

The second week starts with a drop in size. Monday the 10th and Tuesday the 11th have clean but strong winds and a building swell. Tuesday gets huge – 13.1ft from the SW with fresh cross-off winds. The energy is enormous (6042), making it a serious, heavy groundswell for experts only. Wednesday the 12th is still pumping with 11.5ft SSW swell, but the wind stays fresh. By Thursday the 13th, the swell fades right back to 3.3ft, so that's a rest day.

The real hidden gem of the second week is Friday the 14th and Saturday the 15th. We get a beautiful, long-period WSW groundswell of 5.2ft – 6.2ft with a 15-16 second period. This is a classic Big Bay directional swell. Friday morning is glassy, and both days have clean, cross-off winds. The energy is strong (up to 1673), and the consistency is there. These are the best bets for the second week, offering excellent, well-shaped waves for experienced surfers.

The outlook fades out through the 16th and 17th with clean but smaller windswell. It's a clean, fun background option but not the highlight.

Short Range Forecast

Mostly dry. Warm (max 24°C on Mon afternoon, min 13°C on Wed morning). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 9mm), mostly falling on Thu morning. Very mild (max 17°C on Fri afternoon, min 12°C on Wed night). Wind will be generally light.

Sun
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
2
3
2
1
3
1
0
3
5
4
5
5
3
4
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
SW
12
1.4
SW
13
1.4
SW
12
1.2
WSW
13
1.6
SW
12
1.4
SW
11
1.1
SW
11
0.8
SW
14
2
SW
16
2.2
SW
15
3.5
WSW
14
3
WSW
13
3
SW
13
3
SW
14
3
SW
14
3
SW
13
3
SW
13
2.4
SW
13
3
SW
13
3
SW
12
Wave Graph
Metric surfscale
Energy kJ
442
669
619
499
683
431
258
251
1929
2111
4376
3184
2522
3569
3247
2824
2679
1982
3409
2227
Wind (km/h)
0
W
5
E
5
E
10
SSW
5
NE
5
SE
10
SW
10
NE
20
NNW
25
NW
25
N
10
ESE
5
SE
10
SE
5
ENE
5
WSW
5
WSW
20
NW
25
NNW
25
W
Wind State
glassy
off
glassy
cross
glassy
glassy
cross-on
cross-off
cross-on
cross-on
cross
off
cross-off
cross-off
cross-off
cross-on
glassy
cross-on
cross-on
cross-on
High Tide
5:34PM1.52m
5:48AM1.34m
6:08PM1.47m
6:28AM1.27m
6:48PM1.41m
7:15AM1.19m
7:38PM1.32m
8:20AM1.10m
8:48PM1.23m
9:52AM1.05m
10:22PM1.20m
11:32AM1.10m
11:55PM1.25m
Low Tide
11:47PM0.21m
11:48AM0.21m
00:24AM0.25m
12:25PM0.29m
1:09AM0.31m
1:11PM0.39m
2:07AM0.39m
2:13PM0.48m
3:28AM0.44m
3:47PM0.55m
5:09AM0.43m
5:37PM0.51m
clear
clear
clear
clear
clear
clear
cloud
clear
clear
clear
rain showers
mod rain
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:37
7:35
7:35
7:33
7:33
7:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:07
6:08
6:08
6:09
6:10
 mm
2
7
5
Temp °C
20
18
19
24
19
19
19
17
15
16
14
13
15
14
14
17
14
14
14
15
Feels °C
17
16
17
23
16
18
17
16
12
12
11
13
14
12
13
16
13
11
9
12
  • 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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