Kosi Bay surfForecast / KZN North / South Africa

information circle12 Day Weather and Surf, issued 1 pm Friday 26 Dec 2025 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
26.7° 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 Wednesday (Dec 31) at 5AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.1m and 9s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kosi Bay in the next 12 days are 2.0m 8s and forecast to arrive on Wednesday (Dec 31) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Jan 01) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 31st Dec)5ft (1.6m) 8s
Best Surf 5AM (Wed 31st Dec)5ft (1.6m) 8s
Most Powerful11PM (Wed 31st Dec)6.5ft (2.0m) 8s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 7mm), mostly falling on Fri night. Warm (max 26°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Thu morning. Warm (max 25°C on Mon afternoon, min 22°C on Wed night). Winds increasing (light winds from the NE on Tue morning, fresh winds from the NE by Wed afternoon).

Fri
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
0
0
1
0
1
1
Swell
Height Map
Wave Height (m) & direction (?)
1.2
E
1.2
ESE
1.1
E
1.1
E
0.9
ESE
1.1
E
0.9
ESE
1.2
E
1.2
ESE
1.3
ESE
1.3
ESE
1.3
ESE
1.6
E
1.7
E
1.5
E
1.7
E
1.9
E
1.3
ESE
1.1
ESE
1.5
E
1.3
E
Period(s) (?)999999967888888888998
Wave
Graph
(?)Metric surfscale
Energy kJ (?)25625420319913217712689131227221207343396298396481252189348241
Wind
(km/h)
20
SE
15
SSE
10
SE
20
E
15
ESE
10
NE
15
ENE
15
E
15
ESE
15
E
10
E
15
NE
25
NE
20
NE
15
NNE
30
NE
15
NE
20
NNE
30
ENE
15
ENE
15
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
oncross-
on
oncrosscrosscross-
on
cross-
on
cross-
on
cross-
on
crosscrosscrosscross-
off
crosscrosscross-
off
crosscrosscross-
off
High Tide
/ height (m)
7:31PM
1.71
8:09AM
1.77
8:26PM
1.59
9:12AM
1.69
9:39PM
1.50
10:34AM
1.65
11:13PM
1.48
12:03PM
1.68
12:41AM
1.56
1:18PM
1.78
1:48AM
1.71
2:17PM
1.90
2:43AM
1.87
Low Tide
/ height (m)
1:45AM
0.47
2:24PM
0.63
2:41AM
0.57
3:35PM
0.70
3:55AM
0.64
5:04PM
0.71
5:25AM
0.64
6:30PM
0.63
6:49AM
0.55
7:37PM
0.49
7:55AM
0.41
8:31PM
0.34
8:49AM
0.27
Fri
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
Sunrise--4:54--4:54--4:54--4:56--4:56--4:56--4:58
Sunset6:43--6:43--6:44--6:44--6:45--6:45--6:45--
clear
thunderstorm
cloud
part cloud
light rain
light rain
rain showers
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
clear
light rain
thunderstorm
thunderstorm
light rain
light rain
Rain (mm)
-1--411---------34133
Temp. °C262424252324252424252425252424252424242323
Feels °C (?)252325252225262324242424232224222123232223
  • Map Icons:
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  • 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 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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