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Surf Forecasts:

Arniston surf break

Arniston surfForecast / Overberg / South Africa

information circle12 Day Weather and Surf, issued 7 am Saturday 20 Sep 2025 SAST
Forecast update in hr  min  s Forecast update imminent
Arniston surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Arniston sea temperature is
16.4° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Arniston this week:

The surf forecast for Arniston over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 20) at 11AM. The primary swell is predicted to be 2.1m and 9s period with a secondary swell of 1.2m and 13s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Arniston in the next 12 days are 1.5m 14s and forecast to arrive on Friday (Sep 26) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Saturday (Sep 20) at 2PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Sat 20th Sep)7ft (2.1m) 9s
Best Surf11AM (Sat 20th Sep)7ft (2.1m) 9s
Most Powerful 2PM (Fri 26th Sep)5ft (1.5m) 14s

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

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

Short Range Forecast Light rain (total 5mm), mostly falling on Sun night. Very mild (max 19°C on Sat morning, min 12°C on Mon night). Winds increasing (light winds from the N on Sat night, strong winds from the SW by Sun night).

Days 3-6 Weather Summary Mostly dry. Very mild (max 15°C on Tue morning, min 11°C on Tue morning). Winds increasing (light winds from the SW on Tue morning, strong winds from the E by Thu morning).

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
!
0
3
0
0
2
0
1
1
1
0
0
0
0
0
0
0
0
2
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.1
ESE
1.2
SSE
1
SSE
1.1
E
0.8
SSE
0.7
SSE
1.4
SSW
1.2
S
0.9
S
0.8
S
0.8
S
1.5
S
1.5
SSW
1.6
S
1
SW
0.9
SW
0.8
SW
1
SSW
1.5
SSW
1.4
SSW
1.3
SSW
Period(s) (?)913121012117778789913121215141414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)724461293221153107173139718070284372402342220172487899789630
Wind
(km/h)
40
WSW
40
WSW
10
NW
15
E
30
ESE
25
NW
30
WSW
25
SW
10
NW
5
SW
30
S
30
SE
30
ESE
35
ESE
30
E
40
E
40
E
30
E
15
ESE
20
ESE
20
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		ononoffcross-
off		cross-
off		cross-
off		cross-
off		crosscross-
on		ononcross-
on		cross-
on		ononononcross-
on
High Tide
/ height (m)
2:37PM
1.90
2:50AM
1.80
3:04PM
1.96
3:18AM
1.83
3:30PM
1.97
3:45AM
1.82
3:55PM
1.94
4:11AM
1.78
4:20PM
1.87
4:36AM
1.70
4:45PM
1.77
5:02AM
1.61
5:09PM
1.65
Low Tide
/ height (m)
8:31AM
0.17
8:54PM
0.14
8:57AM
0.13
9:19PM
0.10
9:22AM
0.12
9:44PM
0.09
9:46AM
0.14
10:08PM
0.12
10:10AM
0.20
10:31PM
0.19
10:33AM
0.28
10:55PM
0.28
10:57AM
0.39
11:19PM
0.40
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Sunrise6:31--6:30--6:28--6:28--6:26--6:24--6:22--
Sunset-6:32--6:34--6:35--6:35--6:36--6:37--6:37-
clear
clear
part cloud
cloud
part cloud
rain showers
rain showers
clear
clear
clear
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
Rain (mm)
-----41--------------
Temp. °C191915151616161614151515151514141415171717
Feels °C (?)111111131313891013109888669151415
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Overberg

  1. weather stationWind Update The wind is still cross-off at Arniston (light winds from the SW at Struisbaai 20 km from Arniston). 2.3m 9s swell from the ESE with a 1.3m 13s groundswell from the SSE. 2 swells combining so expect closeout sets.

    1 hour 23 minutes ago Arniston
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20 km away, 1 h 23 min ago

15 km/h
SW
0.0
16.4
Air / Water (°C)
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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Arniston 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 Arniston at:
surf-forecast.com

Information about the Arniston Surf forecast

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

Are you planning a holiday in Overberg? If you are looking for accommodation near Arniston, camping, hotels and holiday cottages in Overberg, consider staying in Hermanus which is 97 km (60 miles) away.

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