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Surf Forecasts:
Arniston surfForecast / Overberg / South Africa
48hr Weather and Surf, issued 1 pm 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 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) & Date | Wave Height | Wave 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 ForecastMostly 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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | SSW 17 | SSW 16 | SW 16 | SW 16 | SW 15 | SSW 15 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | |
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) | ||||||||||||||||||||||||
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 | ||||||||||||||||||
 | | |  | | |  |  |  | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 7:30 | — | — | — | — | — | — | — | 7:31 | — | — | — | — | — | — | — | 7:31 | — |
 | — | — | 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) | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | E 8 | SSW 6 | S 6 | S 6 | S 6 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 |
 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) | SSW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 6 | E 8 | SW 16 | SW 15 | SSW 15 | S 6 | S 6 | S 6 | SW 9 | SW 8 | SW 8 | SW 7 | E 11 | E 11 | ESE 11 |
| 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) | SE 11 | SW 21 | SSW 20 | SSW 20 | SSW 19 | SW 12 | SW 11 | S 10 | SW 11 | SSW 16 | SW 16 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SSE 6 | SSE 6 | E 8 | ESE 11 | SW 8 | SW 18 | SE 12 |
| 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) | — | WSW 3 | WSW 3 | WSW 4 | WSW 4 | W 3 | W 3 | W 3 | WSW 3 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 1 | 4 | 11 | 10 | 8 | 8 | 8 | 5 | 46 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
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 | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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