Surf Forecasts:
How big are the waves at Thermopylae today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 6.5ft (2.0m), 13s period with SW swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 6ft (1.8m), 13s period with SW swell.
- Evening surf: Evening surf (20 Sep, local time) - 5ft (1.6m), 13s period with WSW swell.
The current surf forecast for Thermopylae at 11AM is: 1.9m 13s primary swell from a Southwest direction (forecast issued at 07:00am September 20). An open ocean swell of 0.8m 6s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 6.5ft (2.0m) | 13s |
| Afternoon (20 Sep) | 6ft (1.8m) | 13s |
| Evening (20 Sep) | 5ft (1.6m) | 13s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 29°C on Tue morning, min 16°C on Tue night). Wind will be generally light. | |||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||||||||
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 | 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 13 | SW 13 | SW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 1452 | 1367 | 1288 | 1198 | 998 | 809 | 784 | 636 | 545 | 536 | 472 | 371 | 347 | 329 | 314 | 314 | 308 | 342 | 374 | 386 | 367 | 435 | 483 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | off | off | cross-off | cross | cross-on | glassy | cross | on |
High Tide | 11:21AM1.20m | 11:45PM1.20m | 12:29PM1.32m | 00:43AM1.31m | 1:07PM1.44m | ||||||||||||||||||
Low Tide | 4:29AM0.87m | 5:44PM0.89m | 6:01AM0.79m | 6:43PM0.77m | 6:48AM0.68m | 7:18PM0.64m | |||||||||||||||||
 |  | | | | | | | | | | | | | | |  | | |  | |  | | |
 | 6:39 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — |
 | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 23 | 25 | 23 | 21 | 20 | 19 | 17 | 18 | 22 | 26 | 27 | 26 | 24 | 23 | 23 | 24 | 29 | 23 | 21 | 20 | 19 |
Feels °C | 16 | 18 | 22 | 23 | 21 | 19 | 19 | 18 | 16 | 17 | 21 | 25 | 26 | 26 | 24 | 23 | 23 | 23 | 28 | 22 | 22 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 |
| kJ | 1452 | 1367 | 1288 | 1198 | 998 | 809 | 784 | 636 | 545 | 536 | 472 | 371 | 347 | 329 | 314 | 314 | 308 | 342 | 374 | 386 | 367 | 435 | 483 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 15 | SSW 15 | SSW 15 | SSE 6 | SW 14 | SW 14 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | NNW 3 | S 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 57 | 87 | 142 | 48 | 203 | 149 | 135 | 128 | 82 | 90 | 1 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SSE 6 | SSE 6 | SE 6 | SSE 5 | SSE 5 | S 16 | S 15 | ESE 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 167 | 35 | 21 | 17 | 6 | 3 | 5 | 4 | 6 |
Wind waves Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | — | NNW 3 | NW 3 | WNW 3 | SW 3 | — |
| kJ | 51 | 47 | 36 | 42 | 58 | 97 | 132 | 104 | 77 | 62 | 70 | 71 | 68 | 60 | 122 | 74 | 54 | — | 3 | 4 | 5 | 3 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 1 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 24 | 0 | 6 | 17 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||||
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