Kosi Bay surfForecast / KZN North / South Africa

information circle12 Day Weather and Surf, issued 7 pm Thursday 25 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
26.8° C
(Which is 1.0°C warmer than normal for this time of year)


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 11AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.1m and 8s. 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 1.8m 9s and forecast to arrive on Thursday (Jan 01) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 7s period and expected on Monday (Dec 29) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Wed 31st Dec)5ft (1.6m) 8s
Best Surf11AM (Wed 31st Dec)5ft (1.6m) 8s
Most Powerful 2AM (Thu 1st Jan)6ft (1.8m) 9s

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 4mm), mostly falling on Fri night. Warm (max 26°C on Fri morning, min 22°C on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Mon morning, min 23°C on Sun night). Wind will be generally light.

Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
01
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
2
0
2
2
1
Swell
Height Map
Wave Height (m) & direction (?)
1.3
ESE
1.2
ESE
1.2
ESE
1.1
E
1.1
ESE
1.1
ESE
1.1
E
1
E
1
E
1.2
E
1.2
ESE
1.2
ESE
1.3
ESE
1.4
ESE
1.5
E
1.7
E
1.6
E
1.6
E
1.8
E
1.4
E
1.3
E
Period(s) (?)999999999998888888988
Wave
Graph
(?)Metric surfscale
Energy kJ (?)295254265207206202194151151230203207212215295392347364487277239
Wind
(km/h)
15
SSW
15
SE
20
SE
15
SSE
10
SE
20
E
10
SE
5
ENE
15
ENE
10
ESE
15
ESE
20
ESE
10
ESE
15
ENE
20
ENE
15
NE
15
N
25
ENE
5
NE
5
E
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossononononcross-
on
oncrosscrosscross-
on
oncross-
on
cross-
on
cross-
on
crosscrosscross-
off
crossglassglasscross
High Tide
/ height (m)
7:19AM
1.84
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
Low Tide
/ height (m)
1:01AM
0.37
1:29PM
0.53
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
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
01
Sunrise-4:52--4:54--4:54--4:54--4:56--4:56--4:56-
Sunset--6:43--6:43--6:44--6:44--6:45--6:45--6:45
part cloud
clear
part cloud
light rain
cloud
part cloud
light rain
cloud
part cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
clear
light rain
light rain
light rain
Rain (mm)
---1--3-----------142
Temp. °C242626242425232425242525242525242425242122
Feels °C (?)242625222525222625232524232423232323212423
  • 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 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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