Surf Forecasts:
How big are the waves at Thermopylae today (21 Sep):
- Afternoon surf: Afternoon surf (21 Sep, local time) - 4ft (1.2m), 12s period with SW swell.
- Evening surf: Evening surf (21 Sep, local time) - 4ft (1.2m), 11s period with SW swell.
The current surf forecast for Thermopylae at 11PM is: 1.1m 11s primary swell from a Southwest direction and 0.8m 6s secondary swell from a South-southeast direction, 1.2m 6s secondary swell from a Southeast direction (forecast issued at 07:00pm September 21). The wind direction is predicted to be offshore and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | - | - |
| Afternoon (21 Sep) | 4ft (1.2m) | 12s |
| Evening (21 Sep) | 4ft (1.2m) | 11s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 26°C on Tue morning, min 14°C on Wed morning). Wind will be generally light. | |||||||||||||||||||
Mon 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||||
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 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SSE 6 | SSE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 380 | 360 | 314 | 314 | 308 | 342 | 374 | 335 | 367 | 435 | 391 | 371 | 332 | 287 | 287 | 216 | 187 | 256 | 340 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | cross-off | cross-on | on | cross-on | glassy | glassy | cross-on | cross | cross-on | glassy | cross | cross | cross-off | cross-off |
High Tide | 00:43AM1.31m | 1:07PM1.44m | 1:21AM1.43m | 1:37PM1.57m | |||||||||||||||
Low Tide | 6:43PM0.77m | 6:48AM0.68m | 7:18PM0.64m | 7:23AM0.57m | 7:48PM0.51m | ||||||||||||||
 |  | | |  | |  | | | | |  | | | | | | | | |
 | — | — | — | — | 6:35 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — |
 | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:43 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 24 | 23 | 23 | 23 | 26 | 23 | 23 | 20 | 19 | 16 | 15 | 14 | 16 | 17 | 18 | 17 | 16 |
Feels °C | 25 | 25 | 24 | 23 | 23 | 22 | 25 | 23 | 23 | 21 | 20 | 15 | 15 | 14 | 16 | 16 | 16 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 |
| kJ | 380 | 360 | 314 | 314 | 308 | 342 | 374 | 335 | 367 | 435 | 391 | 371 | 332 | 287 | 287 | 216 | 187 | 112 | 104 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SW 15 | SSE 6 | SW 14 | SW 14 | WSW 11 | WSW 11 | WSW 10 | W 11 | S 15 | S 14 | S 13 | S 13 | S 12 | S 12 | W 9 | NNW 5 | — | SW 14 |
| kJ | 87 | 106 | 49 | 203 | 149 | 135 | 117 | 108 | 83 | 4 | 4 | 3 | 13 | 12 | 11 | 6 | 2 | — | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 14 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SSE 6 | SE 6 | S 15 | S 14 | — | S 13 | SSE 12 | SW 15 | S 12 | — | — | — |
| kJ | — | — | 167 | 34 | 26 | 16 | 11 | 6 | 14 | 4 | 4 | — | 13 | 15 | 9 | 11 | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | SSE 6 | SE 6 | SE 6 | — | — | — | NW 3 | — | — | — | — | — | — | — | — | SSE 4 | SSE 6 | SSE 7 |
| kJ | 51 | 56 | 106 | 82 | — | — | — | 2 | — | — | — | — | — | — | — | — | 27 | 256 | 340 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 17 | 17 | 0 | 0 | 17 | 8 | 8 | 0 | 1 | 8 | 8 | 0 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
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