Surf Forecasts:
How big are the waves at Thermopylae today (18 Sep):
- Morning surf: Morning surf (18 Sep, local time) - 6ft (1.8m), 11s period with SW swell.
- Afternoon surf: Afternoon surf (18 Sep, local time) - 5.5ft (1.7m), 12s period with SW swell.
- Evening surf: Evening surf (18 Sep, local time) - 5ft (1.6m), 13s period with SW swell.
The current surf forecast for Thermopylae at 5AM is: 1.7m 11s primary swell from a Southwest direction and 1.4m 6s secondary swell from a Southeast direction (forecast issued at 01:00am September 18). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 6ft (1.8m) | 11s |
| Afternoon (18 Sep) | 5.5ft (1.7m) | 12s |
| Evening (18 Sep) | 5ft (1.6m) | 13s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 25°C on Sun afternoon, min 11°C on Fri morning). Winds decreasing (fresh winds from the SE on Fri afternoon, light winds from the SE by Sun morning). | ||||||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||||||||||
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 | 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 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 739 | 713 | 770 | 713 | 726 | 946 | 796 | 864 | 736 | 712 | 700 | 448 | 407 | 978 | 1423 | 1527 | 1591 | 1474 | 1367 | 1288 | 1030 | 904 | 822 | 702 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off |
High Tide | 7:19AM1.25m | 7:33PM1.24m | 8:50AM1.17m | 9:28PM1.15m | 11:21AM1.20m | |||||||||||||||||||
Low Tide | 00:57AM0.74m | 1:11PM0.85m | 2:06AM0.84m | 3:12PM0.95m | 4:29AM0.87m | 5:44PM0.89m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | | | | | | | | | |
 | — | 6:41 | — | — | — | — | — | — | — | 6:41 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:39 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 11 | 11 | 14 | 18 | 19 | 16 | 14 | 13 | 13 | 13 | 16 | 20 | 19 | 18 | 16 | 16 | 16 | 17 | 22 | 25 | 23 | 21 | 20 |
Feels °C | 7 | 7 | 6 | 7 | 11 | 13 | 12 | 11 | 11 | 11 | 11 | 14 | 17 | 16 | 15 | 13 | 14 | 14 | 15 | 21 | 23 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
| kJ | 739 | 713 | 770 | 713 | 726 | 946 | 796 | 864 | 736 | 712 | 700 | 448 | 407 | 978 | 1423 | 1527 | 1591 | 1474 | 1367 | 1288 | 1030 | 904 | 822 | 702 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 20 | SW 20 | SW 18 | SW 18 | WSW 18 | SW 16 | SW 16 | — | SW 14 | SW 14 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 7 | 15 | 12 | 49 | 31 | 91 | 127 | — | 301 | 350 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 7 | SE 7 | SSE 7 | SE 7 | SE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 |
| kJ | 209 | 162 | 157 | 253 | 322 | 458 | 303 | 191 | 109 | 127 | 134 | 134 | 145 | 238 | 304 | 253 | 187 | 150 | 106 | 75 | 75 | 159 | 202 | 155 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 8 | 1 | 1 | 8 | 10 | 8 | 1 | 1 | 0 | 0 | 0 | 0 | 8 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 8 | 1 | 0 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
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