Arniston surf break

Arniston surfForecast / Overberg / South Africa

information circle48hr Weather and Surf, issued 1 pm Thursday 21 May 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
17.0° C
(Which is normal for this time of year)

How big are the waves at Arniston today?

The current surf forecast for Arniston at 7PM is: 1.5m 8s primary swell from a East-southeast direction and 0.4m 12s secondary swell from a Southwest direction (forecast issued at 01:00pm May 21). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (SAST) & DateWave HeightWave Period
Morning (21 May)7ft (2.1m)9s
Afternoon (21 May)5.5ft (1.7m)8s
Evening (21 May)5ft (1.5m)8s

Table - waves today at Arniston. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 20°C on Thu afternoon, min 16°C on Thu night). Wind will be generally light.

Thu
21
Friday
22
Saturday
23
Sun
24
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
Rating
(10 max)
2
2
1
0
2
2
2
2
1
2
2
2
2
2
2
2
2
0
1
1
1
1
2
2
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
2
ESE
9
1.7
ESE
9
1.6
ESE
8
1.5
ESE
8
1.4
ESE
8
1.2
ESE
8
1.1
ESE
8
1
E
8
0.5
SSW
17
0.6
SSW
16
0.7
SW
16
0.7
SW
16
0.7
SW
15
0.8
SSW
15
0.7
SW
14
0.7
SW
14
0.7
SW
13
0.6
SSW
13
0.7
SW
13
0.7
SW
14
0.7
SW
14
0.7
SW
14
0.7
SW
14
0.9
SW
14
Wave Graph
Metric surfscale
Energy kJ
589
442
361
306
256
212
176
137
160
175
261
255
223
272
211
203
172
109
162
211
214
211
194
264
Wind (km/h)
20
W
25
W
25
WSW
30
WSW
25
W
20
WNW
20
WNW
25
W
20
WSW
15
WSW
15
SW
10
WSW
10
WNW
10
NW
10
NW
10
WNW
10
W
5
S
10
SSE
10
E
10
NE
5
NE
5
NE
5
NE
cross-off
cross-off
cross-off
cross-off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
off
cross
cross-on
on
cross-on
cross
glassy
glassy
High Tide
7:07PM1.57m
7:30AM1.40m
8:20PM1.50m
8:52AM1.30m
9:39PM1.48m
Low Tide
12:45PM0.38m
1:30AM0.54m
1:49PM0.51m
2:54AM0.61m
3:05PM0.59m
4:21AM0.60m
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:30
7:31
7:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:40
5:39
5:39
5:38
Temp °C
18
20
18
16
16
16
16
16
18
18
17
17
16
16
16
16
17
17
17
16
16
16
16
16
15
17
15
12
13
13
13
13
16
16
16
16
15
15
14
15
16
17
17
15
16
16
16
16
Swell 1
Height (m)
Direction
Period (s)
2
ESE
9
1.7
ESE
9
1.6
ESE
8
1.5
ESE
8
1.4
ESE
8
1.2
ESE
8
1.1
ESE
8
1
E
8
0.9
ESE
8
0.8
E
8
0.8
SSW
6
0.9
S
6
0.8
S
6
0.8
S
6
0.7
SW
14
0.7
SW
14
0.7
SW
13
0.6
SSW
13
0.7
SW
13
0.7
SW
14
0.7
SW
14
0.7
SW
14
0.7
SW
14
0.9
SW
14
Energy kJ
589
442
361
306
256
212
176
137
109
78
53
64
50
48
211
203
172
109
162
211
214
211
194
264
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
13
0.4
SW
12
0.4
SW
12
0.4
SW
12
0.4
SW
12
0.4
SSW
18
0.4
SSW
18
0.4
SSW
18
0.5
SSW
17
0.7
SSW
6
0.7
E
8
0.7
SW
16
0.7
SW
15
0.8
SSW
15
0.7
S
6
0.7
S
6
0.6
S
6
0.6
SW
9
0.6
SW
8
0.6
SW
8
0.5
SW
7
0.5
E
11
0.5
E
11
0.4
ESE
11
Energy kJ
67
40
37
37
37
128
124
123
160
34
57
255
223
272
36
36
27
46
42
39
27
62
61
39
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
11
0.1
SW
21
0.2
SSW
20
0.3
SSW
20
0.3
SSW
19
0.4
SW
12
0.4
SW
11
0.3
S
10
0.4
SW
11
0.6
SSW
16
0.7
SW
16
0.6
E
8
0.6
E
8
0.5
E
8
0.5
E
8
0.5
E
8
0.4
E
8
0.5
SSE
6
0.4
SSE
6
0.4
E
8
0.4
ESE
11
0.4
SW
8
0.4
SW
18
0.4
SE
12
Energy kJ
5
18
38
75
74
36
33
19
33
175
261
41
41
29
28
29
19
21
14
19
42
20
79
37
Wind waves
Height (m)
Direction
Period (s)
0.3
WSW
3
0.4
WSW
3
0.7
WSW
4
0.6
WSW
4
0.6
W
3
0.6
W
3
0.6
W
3
0.4
WSW
3
0.8
SW
6
Energy kJ
1
4
11
10
8
8
8
5
46
Nearest Offshore or Glassy
Rating
(10 max)
1
2
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
2
2
Distance (km)
19
65
19
133
0
0
0
0
103
0
0
0
0
0
0
0
0
19
81
81
76
76
0
0
Best forecast wave conditions in Overberg
Rating
(10 max)
3
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Best forecast wave conditions in South Africa
Rating
(10 max)
3
3
3
2
3
3
2
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
3
Header Global
Rating
(10 max)
5
5
5
5
5
5
5
7
7
7
6
6
7
8
6
7
8
8
7
7
6
6
5
5
  • 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

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