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Surf Forecasts:

Kosi Bay surfForecast / KZN North / South Africa

information circle12 Day Weather and Surf, issued 7 am Monday 12 Jan 2026 SAST
Forecast update in hr  min  s Forecast update imminent
Kosi Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kosi Bay sea temperature is
27.1° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Kosi Bay this week:

The surf forecast for Kosi Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jan 13) at 2AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.3m and 20s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Kosi Bay in the next 12 days are 2.5m 8s and forecast to arrive on Saturday (Jan 17) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Jan 13) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Tue 13th Jan)4ft (1.2m) 8s
Best Surf 2AM (Tue 13th Jan)4ft (1.2m) 8s
Most Powerful 8AM (Sat 17th Jan)8ft (2.5m) 8s

Table - best surf conditions forecast for Kosi Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 23mm), heaviest during Mon afternoon. Warm (max 26°C on Tue morning, min 22°C on Mon night). Winds increasing (light winds from the NNE on Mon morning, fresh winds from the NNE by Tue afternoon).

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu night. Warm (max 27°C on Thu morning, min 22°C on Sat night). Winds increasing (calm on Thu night, fresh winds from the S by Fri afternoon).

Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
1
2
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.2
E
1.1
E
1.2
E
1.1
E
1
E
1
E
1.1
E
1.8
ENE
1.3
E
1.6
E
1.6
ENE
1.5
E
2.2
S
2.3
S
2.3
S
2.5
S
1.9
S
1.1
E
1.1
E
1.1
E
1
E
Period(s) (?)7888888999997888710101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)147161195169143136169466257430442349456583600766376250245240183
Wind
(km/h)
15
N
25
N
20
NNW
30
N
35
N
15
NNW
20
N
20
NNE
20
NNW
25
NNE
25
NE
25
SSW
30
SSW
35
S
30
SSW
35
S
35
S
20
SSW
25
S
30
SSE
30
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscrosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		cross-
on
High Tide
/ height (m)
10:01AM
1.43
10:46PM
1.30
11:52AM
1.39
12:46AM
1.34
1:22PM
1.47
1:56AM
1.46
2:16PM
1.60
2:41AM
1.61
2:55PM
1.74
3:16AM
1.75
3:28PM
1.87
3:48AM
1.89
3:59PM
1.98
4:18AM
2.01
Low Tide
/ height (m)
4:34PM
0.89
5:07AM
0.87
6:29PM
0.86
6:55AM
0.82
7:44PM
0.74
7:59AM
0.70
8:31PM
0.59
8:43AM
0.55
9:07PM
0.45
9:18AM
0.42
9:38PM
0.32
9:51AM
0.31
10:08PM
0.20
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Sunrise5:05--5:05--5:07--5:07--5:07--5:09--5:09--
Sunset-6:46--6:46--6:46--6:46--6:45--6:45--6:45-
light rain
mod rain
part cloud
clear
clear
clear
rain showers
rain showers
rain showers
part cloud
part cloud
rain showers
light rain
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
thunderstorm
Rain (mm)
58----415--22-------3
Temp. °C242323262624252624272725242625252625272725
Feels °C (?)272222242323252624272727222323222324262625
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kosi 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.

View detailed surf forecast for Kosi Bay at:
surf-forecast.com

Information about the Kosi Bay Surf forecast

The above surf forecast table for Kosi Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Kosi Bay can be found by selecting the local surf guide option on the grey menu. Our Kosi 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 (Kosi 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 Kosi 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.

Kosi Bay is 108 km (67 miles) from the city of Maputo. If you plan a holiday in KwaZulu-Natal North Coast, look for hotels and other accommodation in Maputo. Maputo has rooms for a wide range of budgets as well as car hire and transport links.

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