Surf Forecasts:
How big are the waves at Thermopylae today (17 Sep):
- Afternoon surf: Afternoon surf (17 Sep, local time) - 6ft (1.9m), 12s period with SW swell.
- Evening surf: Evening surf (17 Sep, local time) - 6ft (1.8m), 12s period with SW swell.
The current surf forecast for Thermopylae at 11PM is: 1.7m 12s primary swell from a Southwest direction and 1.7m 6s secondary swell from a South-southeast direction (forecast issued at 07:00pm September 17). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | - | - |
| Afternoon (17 Sep) | 6ft (1.9m) | 12s |
| Evening (17 Sep) | 6ft (1.8m) | 12s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 25°C on Sun afternoon, min 11°C on Thu night). Winds decreasing (fresh winds from the SE on Thu night, light winds from the SE by Sun morning). | |||||||||||||||||||
Thu 17 | Friday 18 | Saturday 19 | |||||||||||||||||
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 |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 945 | 851 | 765 | 739 | 713 | 713 | 713 | 726 | 946 | 878 | 864 | 736 | 712 | 700 | 448 | 448 | 978 | 1220 | 1527 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:43PM1.36m | 7:19AM1.25m | 7:33PM1.24m | 8:50AM1.17m | 9:28PM1.15m | ||||||||||||||
Low Tide | 00:57AM0.74m | 1:11PM0.85m | 2:06AM0.84m | 3:12PM0.95m | |||||||||||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | 6:41 | — | — | — | — | — | — | — | 6:41 | — | — | — | — | — | — |
 | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 14 | 13 | 12 | 11 | 11 | 14 | 19 | 19 | 16 | 14 | 13 | 13 | 13 | 17 | 20 | 19 | 18 | 16 |
Feels °C | 7 | 6 | 6 | 6 | 7 | 7 | 8 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 14 | 18 | 16 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 |
| kJ | 945 | 851 | 765 | 739 | 713 | 713 | 713 | 726 | 946 | 878 | 864 | 736 | 712 | 700 | 448 | 448 | 978 | 1220 | 1527 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | W 20 | SW 20 | SW 18 | SW 18 | WSW 18 | SW 16 | SW 16 | — | SW 14 | SW 14 | — | — | — |
| kJ | — | — | — | — | — | — | 7 | 15 | 12 | 49 | 31 | 91 | 127 | — | 301 | 350 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 7 | SE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 7 | SSE 7 |
| kJ | 444 | 302 | 238 | 202 | 157 | 188 | 245 | 312 | 493 | 295 | 163 | 99 | 145 | 175 | 134 | 155 | 246 | 304 | 222 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 405 | 115 | 8 | 8 | 1 | 1 | 13 | 10 | 13 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 139 | 1 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
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