Surf Forecasts:
How big are the waves at Thermopylae today (15 Sep):
- Afternoon surf: Afternoon surf (15 Sep, local time) - 3.5ft (1.1m), 16s period with SW swell.
- Evening surf: Evening surf (15 Sep, local time) - 7ft (2.1m), 15s period with SW swell.
The current surf forecast for Thermopylae at 11PM is: 2.5m 15s primary swell from a Southwest direction and 1.7m 8s secondary swell from a Northwest direction (forecast issued at 07:00pm September 15). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Sep) | - | - |
| Afternoon (15 Sep) | 3.5ft (1.1m) | 16s |
| Evening (15 Sep) | 7ft (2.1m) | 15s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 22mm), heaviest during Tue night. Very mild (max 18°C on Fri afternoon, min 12°C on Tue night). Winds increasing (light winds from the SSW on Tue night, strong winds from the SSE by Thu afternoon). | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | |||||||||||||||||
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 16 | SW 15 | SW 15 | SW 14 | WSW 14 | WSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 1001 | 1417 | 2662 | 3383 | 3162 | 2576 | 2494 | 2456 | 999 | 1069 | 1395 | 1446 | 1229 | 1189 | 1180 | 1111 | 945 | 851 | 765 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:38PM1.62m | 5:57AM1.48m | 6:09PM1.50m | 6:32AM1.36m | 6:43PM1.36m | ||||||||||||||
Low Tide | 11:46PM0.52m | 11:50AM0.60m | 00:18AM0.63m | 12:24PM0.73m | |||||||||||||||
 |  |  |  | |  | | | |  | | | | | | | | | | |
 | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:43 | — | — | — | — | — | — |
 | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | — | 4 | 11 | 6 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 13 | 12 | 13 | 14 | 14 | 15 | 15 | 14 | 13 | 12 | 12 | 13 | 15 | 17 | 16 | 14 | 13 |
Feels °C | 8 | 9 | 10 | 10 | 8 | 7 | 6 | 6 | 7 | 6 | 6 | 4 | 5 | 5 | 6 | 8 | 7 | 6 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 14 | WSW 14 | WSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 |
| kJ | 1001 | 1417 | 2662 | 3383 | 3162 | 2576 | 2494 | 2456 | 999 | 1069 | 1395 | 1446 | 1229 | 1189 | 1180 | 1111 | 945 | 851 | 765 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 13 | NW 8 | WNW 7 | SW 15 | SW 14 | SW 14 | SW 14 | W 13 | WSW 13 | W 13 | W 13 | W 12 | W 12 | — | — | — | — | — |
| kJ | 7 | 7 | 326 | 168 | 305 | 632 | 849 | 526 | 878 | 669 | 475 | 324 | 196 | 144 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SE 13 | NNW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 7 | 57 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 7 | NW 8 | — | — | — | — | SSW 9 | — | SSE 5 | S 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 |
| kJ | 623 | 614 | — | — | — | — | 676 | — | 143 | 377 | 419 | 417 | 408 | 330 | 311 | 245 | 319 | 302 | 231 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 344 | 192 | 26 | 1 | 139 | 327 | 344 | 344 | 174 | 174 | 52 | 52 | 52 | 52 | 405 | 139 | 919 | 115 | 13 |
Best forecast wave conditions in Cape Town | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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