Thermopylae Surf Forecast

/ Cape Town (69 surf breaks) /

South Africa (273 surf breaks) / Lat Long: (33.90° S 18.40° E)

Surf Forecasts:

Thermopylae surfForecast / Cape Town / South Africa

48hr Weather and Surf, issued 1 pm Friday 17 Oct 2025 SAST

Forecast 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 14.8° 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 3PM is: 2.4m 12s primary swell from a South-southwest direction and 0.1m 12s secondary swell from a Northwest direction (forecast issued at 01:00pm October 17). The wind direction is predicted to be cross-onshore.

Time (SAST) & Date	Wave Height	Wave Period
Morning (17 Oct)	8ft (2.5m)	13s
Afternoon (17 Oct)	8ft (2.4m)	12s
Evening (17 Oct)	7ft (2.1m)	12s

Table - waves today at Thermopylae. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Friday 17					Saturday 18								Sunday 19								Monday 20
	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
Rating (10 max)	4	3	3	4	4	2	1	1	1	1	1	2	3	8	8	7	8	6	4	3	4	4	3	4
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	SSW	SSW	SSW	SSW	SSW	SW	SSW	SSW	SW	SW	SSW	SSW	SSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	12	12	12	12	11	11	11	11	11	11	12	14	16	17	17	16	16	16	16	16	16	16	15	14
Wave Graph (?)
kJ (?)	1960	1737	1447	1237	1062	1114	593	543	829	757	1082	2091	4299	8498	9386	7826	7523	5805	5113	4471	3866	3269	2516	2082
Wind (km/h)	WSW	WSW	SW	SW	SSE	S	S	S	SSW	SSW	S	SSE	SSE	SSE	SE	SE	SSE	S	SSE	SSE	SE	SE	SE	SE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	glass	cross- off	cross	cross	cross	cross	cross	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
High Tide / height (m)		1:10PM 1.61				1:35AM 1.53				1:44PM 1.69					2:06AM 1.59				2:14PM 1.74				2:35AM 1.64
Low Tide / height (m)				7:33PM 0.48				7:36AM 0.52					8:04PM 0.42				8:06AM 0.47				8:31PM 0.37

	Friday 17					Saturday 18								Sunday 19								Monday 20
Sunrise	-	-	-	-	-	-	-	6:01	-	-	-	-	-	-	-	6:00	-	-	-	-	-	-	-	5:58
Sunset	-	-	7:00	-	-	-	-	-	-	-	7:00	-	-	-	-	-	-	-	7:01	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	20	20	19	17	16	16	15	15	16	16	16	15	14	14	13	14	18	20	19	18	14	13	13	14
Feels °C (?)	18	17	16	17	14	13	11	12	12	12	11	11	9	10	9	10	15	16	14	13	10	9	10	11

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Cape Town

Wind Update Wind reports 0 km away suggest it is still onshore at Thermopylae (light winds from the W at SHIP6229). A 2.2m groundswell from the SSW
1 hour 7 minutes ago Thermopylae

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1 h 7 min ago

18 km/h

Onshore

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