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Surf Forecasts:

Arniston surf break

Arniston surfForecast / Overberg / South Africa

information circle16 Day Weather and Surf, issued 7 am Tuesday 17 Mar 2026 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
20.9° C
 (Which is 1.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Arniston this week:

The surf forecast for Arniston over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Mar 20) at 11PM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.9m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Arniston in the next 16 days are 1.7m 14s and forecast to arrive on Thursday (Mar 19) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Mar 19) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 20th Mar)5ft (1.6m) 9s
Best Surf11PM (Fri 20th Mar)5ft (1.6m) 9s
Most Powerful11AM (Thu 19th Mar)5.5ft (1.7m) 14s

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

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

Short Range Forecast Moderate rain (total 16mm), heaviest on Thu night. Warm (max 22°C on Thu afternoon, min 18°C on Thu night). Winds decreasing (fresh winds from the E on Wed night, light winds from the SE by Thu afternoon).

Days 3-6 Weather Summary Some drizzle, heaviest during Fri morning. Warm (max 21°C on Sun afternoon, min 18°C on Fri night). Winds decreasing (fresh winds from the SW on Fri morning, calm by Sat morning).

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
1
3
1
1
1
3
1
0
0
0
0
0
0
1
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
SSW
1
SSW
1
SSW
0.9
SSW
1.1
SSW
1.4
SSW
1.7
SSW
1.6
SSW
1.5
SSW
1
SSW
1.9
SSW
1.4
S
1.3
SSW
1.2
SSW
1.2
SSW
1
SSW
0.9
SSW
1.1
SSW
1.5
SSW
1.7
SSW
1.4
SSW
Period(s) (?)1111111013161414131399121212121212121413
Wave
Graph
(?)Metric surfscale
Energy kJ (?)217226226154390966120610757033505672904443993992522113226141004604
Wind
(km/h)
30
ESE
30
ESE
20
SE
35
ESE
30
ESE
35
E
20
ENE
15
SSW
30
WSW
35
SW
30
SW
5
WSW
10
E
30
E
30
E
15
ESE
20
SSE
10
S
25
SE
20
SSE
5
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononcross-
on		cross-
on		crosscross-
off		cross-
off		cross-
off		cross-
off		ononcross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
2:34PM
1.81
2:51AM
1.99
3:06PM
1.91
3:21AM
2.10
3:39PM
1.95
3:53AM
2.14
4:12PM
1.94
4:26AM
2.11
4:47PM
1.88
5:01AM
2.00
5:25PM
1.76
5:40AM
1.84
6:06PM
1.59
Low Tide
/ height (m)
8:34AM
0.18
8:40PM
0.10
9:04AM
0.05
9:10PM
0.02
9:35AM
-0.04
9:41PM
-0.01
10:08AM
-0.07
10:13PM
0.01
10:42AM
-0.02
10:47PM
0.09
11:18AM
0.08
11:24PM
0.22
11:57AM
0.25
12:06AM
0.40
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Sunrise6:39--6:39--6:39--6:41--6:41--6:43--6:43--
Sunset-6:54--6:52--6:52--6:51--6:49--6:47--6:46-
light rain
rain showers
cloud
thunderstorm
thunderstorm
rain showers
cloud
part cloud
rain showers
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
Rain (mm)
13-211--81-----------
Temp. °C202021202020212220191919191919202120222323
Feels °C (?)171719181616212317131214161413181920212225
  • 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 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:
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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 16 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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