Surf Forecasts:
How big are the waves at Thermopylae today (20 Jul):
- Morning surf: Morning surf (20 Jul, local time) - 6ft (1.8m), 10s period with SW swell.
- Afternoon surf: Afternoon surf (20 Jul, local time) - 5ft (1.5m), 9s period with SW swell.
- Evening surf: Evening surf (20 Jul, local time) - 2.5ft (0.8m), 11s period with SW swell.
The current surf forecast for Thermopylae at 3AM is: 2.2m 10s primary swell from a Southwest direction and 0.8m 10s secondary swell from a West direction (forecast issued at 07:00pm July 19). The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Jul) | 6ft (1.8m) | 10s |
| Afternoon (20 Jul) | 5ft (1.5m) | 9s |
| Evening (20 Jul) | 2.5ft (0.8m) | 11s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Mon afternoon, min 12°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sun 19 | Monday 20 | Tuesday 21 | |||||||||||||||||
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 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 8 | SW 10 | SW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 1069 | 1246 | 1322 | 1060 | 842 | 701 | 478 | 388 | 273 | 129 | 268 | 436 | 584 | 1667 | 2187 | 2603 | 2570 | 2436 | 2114 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | cross | cross | cross | cross-off | cross | cross-on | cross-on | cross | glassy | glassy | glassy | glassy | glassy | cross | cross | cross-off | cross-off |
High Tide | 7:08PM1.63m | 7:28AM1.40m | 7:55PM1.52m | 8:20AM1.30m | 8:49PM1.42m | ||||||||||||||
Low Tide | 1:31AM0.57m | 1:29PM0.60m | 2:24AM0.66m | 2:19PM0.71m | |||||||||||||||
 |  | |  | | | | | | | | | |  | | | | | | |
 | — | — | — | — | 7:47 | — | — | — | — | — | — | — | 7:46 | — | — | — | — | — | — |
 | 5:57 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:59 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 14 | 14 | 14 | 13 | 14 | 16 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 15 | 14 | 13 | 13 |
Feels °C | 13 | 13 | 12 | 12 | 12 | 10 | 12 | 14 | 13 | 14 | 14 | 12 | 12 | 12 | 12 | 13 | 11 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SSW 8 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 1069 | 1246 | 1322 | 1060 | 842 | 701 | 478 | 388 | 273 | 129 | 119 | 98 | 584 | 1667 | 2187 | 2603 | 2570 | 2436 | 2114 |
Swell 2 Height (m) Direction Period (s) | W 10 | W 10 | W 10 | W 9 | W 10 | W 10 | W 10 | W 10 | W 10 | SW 10 | SW 12 | SSW 16 | SW 7 | W 9 | W 9 | W 9 | W 9 | SE 11 | SE 11 |
| kJ | 96 | 122 | 113 | 142 | 94 | 94 | 125 | 92 | 120 | 124 | 175 | 436 | 77 | 40 | 39 | 25 | 14 | 31 | 31 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SW 18 | W 10 | SW 16 | SW 12 | SW 11 | SW 11 | WSW 11 | SE 11 | W 9 | — | — |
| kJ | 32 | 18 | 18 | 18 | 17 | 16 | 16 | 8 | 80 | 90 | 268 | 172 | 96 | 31 | 12 | 44 | 14 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNW 3 | NNW 2 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 17 | 0 | 6 | 6 | 6 | 0 | 6 | 17 | 17 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
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