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Extensions Surf Forecast
/ Cape Town (70 surf breaks) /
Surf Forecasts:
Extensions surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 7 am Saturday 18 Apr 2026 SASTForecast update in hr min s Forecast update imminent
Extensions surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Extensions sea temperature is
19.1° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Extensions today?
The current surf forecast for Extensions at 12PM is: 3.5m 11s primary swell from a Southwest direction and 0.1m 12s secondary swell from a Northwest direction (forecast issued at 07:00am April 18). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 11ft (3.5m) | 12s |
| Afternoon (18 Apr) | 10ft (3.0m) | 12s |
| Evening (18 Apr) | 6ft (1.9m) | 13s |
Table - waves today at Extensions. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| 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 | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 11 | 13 | 13 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 10 | 11 | 12 | 12 | 14 | 14 | 14 | 14 | 14 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 4068 | 3718 | 2954 | 2112 | 1671 | 1594 | 1122 | 839 | 588 | 1201 | 1394 | 3752 | 4022 | 3959 | 4832 | 5023 | 5026 | 8213 | 7972 | 7471 | 6940 | 6069 | 5161 | 4458 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 3:56PM 1.57 | 4:08AM 1.69 | 4:36PM 1.53 | 4:50AM 1.60 | 5:20PM 1.44 | |||||||||||||||||||
Low Tide / height (m) | 9:48AM -0.08 | 9:57PM 0.05 | 10:27AM -0.03 | 10:39PM 0.11 | 11:09AM 0.06 | 11:24PM 0.21 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| Sunrise | - | 7:11 | - | - | - | - | - | - | - | 7:11 | - | - | - | - | - | - | - | 7:11 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:17 | - | - | - | - | - | - | - | 6:16 | - | - | - |
 |  |  | |  |  |  | | | |  | | |  | | | | |  | | | |  | | |
Rain (mm) | - | - | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 2 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | - | - | 1 | 1 | - | 1 |
| Temp. °C | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 16 | 17 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 16 | 16 | 15 | 17 | 17 | 16 |
| Feels °C (?) | 10 | 9 | 9 | 7 | 7 | 8 | 9 | 10 | 8 | 7 | 6 | 5 | 3 | 3 | 2 | 4 | 5 | 6 | 8 | 8 | 8 | 9 | 10 | 10 |
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Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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