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Thermopylae Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Thermopylae surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 pm Saturday 16 May 2026 SASTForecast update in hr min s Forecast update imminent
Thermopylae surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thermopylae sea temperature is
15.6° C
(Which is 1.5°C colder than average for this time of year)How big are the waves at Thermopylae today?
The current surf forecast for Thermopylae at 8PM is: 1.7m 13s primary swell from a West-southwest direction and 1.5m 12s secondary swell from a South direction (forecast issued at 01:00pm May 16). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 7ft (2.2m) | 13s |
| Afternoon (16 May) | 6ft (1.8m) | 12s |
| Evening (16 May) | 5.5ft (1.7m) | 13s |
Table - waves today at Thermopylae. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 20°C on Sat afternoon, min 15°C on Sun morning). Winds increasing (light winds from the SSE on Sat afternoon, fresh winds from the SE by Tue morning). | ||||||||||||||||||||||||
Sat 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WSW 12 | WSW 12 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | |
1342 | 1154 | 1049 | 943 | 799 | 700 | 659 | 648 | 433 | 799 | 829 | 850 | 837 | 837 | 863 | 902 | 1042 | 1028 | 915 | 796 | 763 | 870 | 1081 | 1242 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 3:03PM1.77m | 3:15AM1.89m | 3:47PM1.79m | 4:00AM1.85m | 4:33PM1.77m | 4:47AM1.77m | ||||||||||||||||||
Low Tide | 8:51AM0.21m | 9:03PM0.34m | 9:34AM0.21m | 9:49PM0.35m | 10:18AM0.24m | 10:37PM0.40m | ||||||||||||||||||
 | | |  | | | | | | | |  | | | | | |  | | | | | | | |
 | — | — | — | — | — | — | 7:31 | — | — | — | — | — | — | — | 7:33 | — | — | — | — | — | — | — | 7:33 | — |
 | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | 5:51 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 19 | 20 | 19 | 18 | 17 | 16 | 15 | 17 | 18 | 17 | 16 | 16 | 16 | 15 | 15 | 18 | 20 | 19 | 18 | 17 | 17 | 17 | 16 |
15 | 18 | 19 | 18 | 17 | 16 | 15 | 13 | 15 | 15 | 14 | 14 | 13 | 14 | 13 | 13 | 15 | 16 | 15 | 14 | 13 | 12 | 12 | 10 | |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 13 |
 kJ | 1342 | 1154 | 1049 | 943 | 799 | 700 | 659 | 648 | 433 | 799 | 829 | 850 | 837 | 837 | 863 | 902 | 1042 | 1028 | 915 | 796 | 640 | 649 | 624 | 536 |
Swell 2 Height (m) Direction Period (s) | S 13 | S 12 | S 12 | S 12 | S 12 | W 13 | W 13 | S 11 | S 11 | S 11 | S 11 | S 10 | S 13 | SSE 13 | S 10 | S 10 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | S 18 | — | S 16 | — |
| kJ | 914 | 735 | 625 | 628 | 393 | 3 | 3 | 233 | 185 | 185 | 184 | 104 | 87 | 57 | 49 | 73 | 55 | 32 | 31 | 15 | 6 | — | 5 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 13 | W 13 | WSW 15 | — | — | SSE 13 | S 14 | SSE 14 | SSE 13 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 3 | 3 | 193 | — | — | 59 | 58 | 62 | 58 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SE 5 | SSE 5 | SSE 5 | SSE 5 | S 12 | S 11 | SSE 5 | SSE 5 | SSE 5 | SSE 11 | SSE 5 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 |
| kJ | — | 43 | 35 | 42 | 36 | 520 | 467 | 37 | 47 | 47 | 541 | 123 | 133 | 143 | 114 | 114 | 159 | 206 | 352 | 605 | 763 | 870 | 1081 | 1242 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 138 | 87 | 1 | 1 | 1 | 1 | 1 | 1 | 13 | 13 | 13 | 13 | 13 | 138 | 138 |
Best forecast wave conditions in Cape Town | ||||||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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