Surf Forecasts:
How big are the waves at Thermopylae today (18 Jul):
- Morning surf: Morning surf (18 Jul, local time) - 4ft (1.2m), 9s period with SW swell.
- Afternoon surf: Afternoon surf (18 Jul, local time) - 3.5ft (1.0m), 13s period with SW swell.
- Evening surf: Evening surf (18 Jul, local time) - 5ft (1.5m), 12s period with SW swell.
The current surf forecast for Thermopylae at 5PM is: 1.1m 13s primary swell from a Southwest direction and 1.2m 9s secondary swell from a West-southwest direction, 0.3m 3s secondary swell from a Northwest direction (forecast issued at 01:00pm July 18). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jul) | 4ft (1.2m) | 9s |
| Afternoon (18 Jul) | 3.5ft (1.0m) | 13s |
| Evening (18 Jul) | 5ft (1.5m) | 12s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Very mild (max 16°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light. | |||||||||||||||||||||
Sat 18 | Sunday 19 | Monday 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) | SW 9 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 9 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 8 | SW 10 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 307 | 340 | 352 | 748 | 666 | 634 | 624 | 625 | 694 | 836 | 750 | 1010 | 1015 | 940 | 809 | 639 | 481 | 221 | 201 | 124 | 334 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | glassy | glassy | glassy | glassy | cross-off | glassy | cross-on | cross-on | glassy | glassy |
High Tide | 6:25PM1.72m | 6:43AM1.50m | 7:08PM1.63m | 7:28AM1.40m | 7:55PM1.52m | ||||||||||||||||
Low Tide | 12:05PM0.39m | 00:45AM0.48m | 12:46PM0.49m | 1:31AM0.57m | 1:29PM0.60m | ||||||||||||||||
 |  | |  | |  | | |  | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 7:47 | — | — | — | — | — | — | — | 7:47 | — | — | — | — | — | — |
 | — | — | 5:57 | — | — | — | — | — | — | — | 5:57 | — | — | — | — | — | — | — | 5:58 | — | — |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 14 | 14 | 14 | 13 |
Feels °C | 14 | 14 | 15 | 14 | 14 | 12 | 13 | 10 | 12 | 13 | 13 | 13 | 13 | 13 | 11 | 11 | 12 | 12 | 13 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | WSW 9 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 9 | SW 11 | SW 11 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 8 | SSW 8 | SW 10 |
| kJ | 307 | 206 | 207 | 748 | 666 | 634 | 624 | 625 | 694 | 836 | 750 | 1010 | 1015 | 940 | 809 | 639 | 481 | 221 | 201 | 112 | 220 |
Swell 2 Height (m) Direction Period (s) | S 11 | SW 13 | SW 13 | W 12 | W 11 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | SW 11 | SW 11 | SW 10 | SSW 16 |
| kJ | 118 | 340 | 352 | 171 | 198 | 191 | 188 | 149 | 146 | 138 | 72 | 71 | 121 | 121 | 94 | 89 | 121 | 165 | 125 | 124 | 334 |
Swell 3 Height (m) Direction Period (s) | SW 14 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | W 10 | W 10 | W 10 | W 10 |
| kJ | 187 | 112 | 110 | 108 | 98 | 100 | 80 | 82 | 55 | 51 | 32 | 31 | 19 | 17 | 17 | 9 | 8 | 92 | 90 | 65 | 64 |
Wind waves Height (m) Direction Period (s) | — | — | NW 3 | — | NW 3 | NNW 3 | NW 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | — | 2 | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 17 | 17 | 17 | 11 | 11 | 11 | 11 | 11 | 24 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 6 | 0 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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