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Surf Forecasts:
Arniston surfForecast / Overberg / South Africa
48hr Weather and Surf, issued 7 am Wednesday 20 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 12PM is: 3.0m 8s primary swell from a East-southeast direction and 0.6m 12s secondary swell from a South-southeast direction, 0.3m 12s secondary swell from a Southwest direction (forecast issued at 07:00am May 20). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 10ft (3.0m) | 8s |
| Afternoon (20 May) | 10ft (3.0m) | 8s |
| Evening (20 May) | 8ft (2.5m) | 9s |
Table - waves today at Arniston. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Wed morning. Very mild (max 19°C on Thu morning, min 16°C on Thu night). Winds decreasing (strong winds from the E on Wed afternoon, light winds from the NNW by Wed night). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | E 8 | E 8 | SSW 16 | SSW 16 | SW 7 | SW 15 | SW 15 | |
1331 | 1051 | 1023 | 1048 | 1074 | 980 | 926 | 1051 | 793 | 730 | 645 | 579 | 505 | 436 | 322 | 258 | 212 | 169 | 137 | 232 | 226 | 261 | 223 | 217 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | |
High Tide | 6:07PM1.67m | 6:25AM1.56m | 7:07PM1.57m | 7:30AM1.40m | 8:20PM1.50m | |||||||||||||||||||
Low Tide | 11:50AM0.25m | 00:21AM0.42m | 12:45PM0.38m | 1:30AM0.54m | 1:49PM0.51m | |||||||||||||||||||
 |  |  |  | |  | | | | | | | | | |  | | | |  | | | | | |
 | 7:28 | — | — | — | — | — | — | — | 7:28 | — | — | — | — | — | — | — | 7:30 | — | — | — | — | — | — | 7:31 |
 | — | — | — | — | 5:40 | — | — | — | — | — | — | — | 5:40 | — | — | — | — | — | — | — | 5:39 | — | — | 5:39 |
3 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 19 | 19 | 18 | 17 | 16 | 16 | 16 | 17 | 18 | 18 | 18 | 17 | 16 | 16 |
11 | 12 | 13 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 17 | 15 | 15 | 14 | 13 | 14 | 13 | 14 | 14 | 14 | 16 | 15 | 14 | 15 | |
Swell 1 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SW 12 | SSW 15 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | E 8 | E 8 | ESE 8 | ESE 8 | SSW 7 | S 7 | S 7 |
 kJ | 104 | 98 | 88 | 88 | 22 | 42 | 926 | 832 | 793 | 730 | 645 | 579 | 505 | 436 | 322 | 258 | 212 | 169 | 137 | 109 | 85 | 139 | 100 | 74 |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SSW 15 | SW 12 | SSE 12 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | E 8 | SW 15 | SW 15 |
| kJ | 53 | 52 | 23 | 23 | 21 | 21 | 53 | 78 | 71 | 69 | 67 | 40 | 37 | 37 | 37 | 128 | 124 | 123 | 111 | 232 | 226 | 60 | 223 | 217 |
Swell 3 Height (m) Direction Period (s) | SSW 9 | SSW 9 | S 16 | SSW 16 | SSW 15 | SW 14 | SSW 14 | SE 11 | WSW 11 | S 22 | S 21 | SW 21 | SSW 20 | SSW 20 | SSW 19 | SW 12 | SW 11 | SW 11 | SW 11 | SSE 10 | ESE 13 | SSW 16 | E 8 | E 8 |
| kJ | 16 | 16 | 20 | 24 | 43 | 54 | 41 | 33 | 11 | 9 | 9 | 18 | 38 | 75 | 74 | 35 | 33 | 33 | 33 | 19 | 17 | 220 | 58 | 44 |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | — | E 9 | — | — | — | W 4 | WSW 3 | WSW 3 | W 3 | W 3 | W 2 | W 3 | WSW 4 | SW 6 | SSW 7 | SW 7 | — | — |
| kJ | 1331 | 1051 | 1023 | 1048 | 1074 | 980 | — | 1051 | — | — | — | 9 | 1 | 5 | 7 | 3 | 1 | 5 | 14 | 76 | 124 | 261 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 140 | 81 | 107 | 81 | 81 | 81 | 76 | 76 | 19 | 19 | 19 | 65 | 19 | 65 | 0 | 0 | 0 | 0 | 19 | 103 | 120 | 0 | 0 | 0 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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