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Surf Forecasts:
Arniston surfForecast / Overberg / South Africa
48hr Weather and Surf, issued 1 am Thursday 21 May 2026 SASTForecast 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 10AM is: 2.0m 9s primary swell from a East-southeast direction and 0.4m 13s secondary swell from a South-southwest direction (forecast issued at 01:00am May 21). The wind direction is predicted to be offshore and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 7ft (2.1m) | 9s |
| Afternoon (21 May) | 5.5ft (1.7m) | 9s |
| 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 ForecastLight rain (total 2mm), mostly falling on Fri morning. Very mild (max 19°C on Thu afternoon, min 15°C on Fri night). Winds decreasing (fresh winds from the WNW on Thu night, light winds from the NW by Sat morning). | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | SSW 16 | SW 16 | SW 16 | SW 15 | SSW 15 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 14 | |
908 | 714 | 631 | 589 | 490 | 361 | 306 | 256 | 212 | 176 | 137 | 111 | 175 | 261 | 255 | 223 | 272 | 211 | 203 | 172 | 109 | 162 | 211 | 214 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | off | cross | on | cross-on | cross-on | |
High Tide | 6:25AM1.56m | 7:07PM1.57m | 7:30AM1.40m | 8:20PM1.50m | 8:52AM1.30m | 9:39PM1.48m | ||||||||||||||||||
Low Tide | 00:21AM0.42m | 12:45PM0.38m | 1:30AM0.54m | 1:49PM0.51m | 2:54AM0.61m | 3:05PM0.59m | ||||||||||||||||||
 |  |  |  | | |  | | | | |  | | | | | | | | | | | | | |
 | — | 7:28 | — | — | — | — | — | — | — | 7:30 | — | — | — | — | — | — | — | 7:31 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:40 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:39 | — | — |
— | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 17 | 17 | 18 | 19 | 19 | 17 | 16 | 16 | 16 | 17 | 18 | 17 | 17 | 17 | 16 | 15 | 15 | 16 | 17 | 18 | 18 | 17 | 17 |
17 | 17 | 16 | 15 | 15 | 16 | 13 | 12 | 13 | 12 | 14 | 14 | 14 | 15 | 16 | 15 | 14 | 13 | 14 | 16 | 17 | 17 | 16 | 15 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | E 8 | S 7 | S 7 | S 7 | S 7 | S 6 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 14 |
 kJ | 698 | 714 | 631 | 589 | 490 | 361 | 306 | 256 | 212 | 176 | 137 | 109 | 82 | 142 | 117 | 110 | 69 | 51 | 203 | 172 | 109 | 162 | 211 | 214 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SSW 14 | SSW 13 | SSW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | E 8 | SW 16 | SW 15 | SSW 15 | SW 14 | S 6 | S 6 | S 6 | SSE 6 | SW 8 | E 11 |
| kJ | 33 | 71 | 69 | 67 | 40 | 37 | 37 | 37 | 128 | 124 | 123 | 111 | 175 | 58 | 255 | 223 | 272 | 211 | 36 | 25 | 16 | 12 | 32 | 64 |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SSE 11 | SSE 11 | SE 11 | S 13 | SSW 20 | SSW 20 | SSW 19 | SW 12 | SW 11 | S 10 | SW 11 | SW 11 | SW 16 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SSW 16 | SW 8 | SSE 5 | SW 8 |
| kJ | 39 | 13 | 12 | 5 | 3 | 38 | 75 | 74 | 36 | 33 | 19 | 33 | 33 | 261 | 42 | 42 | 29 | 30 | 31 | 20 | 94 | 24 | 11 | 22 |
Wind waves Height (m) Direction Period (s) | ESE 9 | — | — | — | WSW 3 | WSW 3 | WSW 4 | W 4 | W 3 | W 3 | W 3 | WSW 5 | SSW 7 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 908 | — | — | — | 2 | 3 | 10 | 9 | 11 | 8 | 8 | 19 | 77 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 76 | 19 | 19 | 19 | 65 | 65 | 65 | 65 | 0 | 103 | 65 | 110 | 135 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 81 | 81 | 76 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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