Surf Forecasts:
How big are the waves at Thermopylae today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 7.5ft (2.3m), 12s period with WSW swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 8ft (2.5m), 13s period with SW swell.
- Evening surf: Evening surf (18 Aug, local time) - 10ft (3.0m), 12s period with SW swell.
The current surf forecast for Thermopylae at 5PM is: 3.0m 13s primary swell from a Southwest direction (forecast issued at 01:00pm August 18). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | 7.5ft (2.3m) | 12s |
| Afternoon (18 Aug) | 8ft (2.5m) | 13s |
| Evening (18 Aug) | 10ft (3.0m) | 12s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Tue afternoon, min 11°C on Fri morning). Wind will be generally light. | |||||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||||
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 |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | WSW 12 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1216 | 1703 | 2596 | 2752 | 2665 | 2495 | 2221 | 2078 | 1978 | 1742 | 1638 | 1550 | 1565 | 2065 | 3385 | 3874 | 3732 | 3165 | 2660 | 2113 | 1866 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off |
High Tide | 6:59PM1.51m | 7:19AM1.32m | 7:41PM1.38m | 8:14AM1.22m | 8:42PM1.27m | ||||||||||||||||
Low Tide | 12:35PM0.59m | 1:15AM0.65m | 1:14PM0.71m | 2:05AM0.76m | 2:09PM0.83m | ||||||||||||||||
 | | |  | | |  | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — |
 | — | — | 6:17 | — | — | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 13 | 13 | 12 | 12 | 12 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 13 | 13 |
Feels °C | 13 | 13 | 12 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 12 | 13 | 12 | 12 | 12 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 |
| kJ | 1216 | 1703 | 2596 | 2752 | 2665 | 2495 | 2221 | 2078 | 1978 | 1742 | 1638 | 1550 | 1565 | 2065 | 3385 | 3874 | 3732 | 3165 | 2660 | 2113 | 1866 |
Swell 2 Height (m) Direction Period (s) | SW 12 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 678 | 454 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 8 | 40 | 52 | 0 | 0 | 0 | 0 | 8 | 21 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 27 | 2 | 1 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Live Wind Speed (km/h)
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