Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Posties surfForecast / SA – East Coast / Australia
48hr Weather and Surf, issued 9 am Saturday 20 Dec 2025 ACDTForecast update in hr min s Forecast update imminent
Posties surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Posties sea temperature is
17.1° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Posties today?
The current surf forecast for Posties at 4PM is: 1.2m 9s primary swell from a South-southwest direction and 0.7m 8s secondary swell from a South-southeast direction (forecast issued at 09:30am December 20). The wind direction is predicted to be cross-shore.
| Time (ACDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Dec) | 4ft (1.2m) | 10s |
| Afternoon (20 Dec) | 4ft (1.2m) | 9s |
| Evening (20 Dec) | 3.5ft (1.1m) | 8s |
Table - waves today at Posties. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 20 | Sunday 21 | Monday 22 | Tue 23 | |||||||||||||||||||||
| 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 13 | 13 | 6 | 7 | 7 | 7 | 12 | 12 | 13 | 13 | 11 | 11 | 12 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 225 | 261 | 293 | 221 | 227 | 138 | 284 | 221 | 176 | 180 | 205 | 265 | 389 | 458 | 407 | 406 | 362 | 314 | 543 | 623 | 785 | 536 | 1723 | 854 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross | cross- on | cross- off | cross- off | cross- off | cross- off | on | cross- off | on | cross- on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on |
High Tide / height (m) | 11:39AM 0.56 | 2:29AM 1.23 | 12:35PM 0.56 | 2:56AM 1.25 | 1:17PM 0.57 | 3:23AM 1.25 | ||||||||||||||||||
Low Tide / height (m) | 10:46AM 0.56 | 6:18PM 0.27 | 10:47AM 0.55 | 6:51PM 0.27 | 10:58AM 0.55 | 7:24PM 0.27 | ||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | Tue 23 | |||||||||||||||||||||
| Sunrise | 5:39 | - | - | - | - | - | - | - | 5:39 | - | - | - | - | - | - | - | 5:39 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 8:28 | - | - | - | - | - | - | - | 8:28 | - | - | - | - | - | - | - | 8:29 | - | - | - |
 | | |  | |  | | | |  |  | | | | | | |  | | | |  | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 2 | 3 | 3 | 1 | - | - | - | - | - | - | - | - | 1 | - | - |
| Temp. °C | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 16 | 15 | 13 | 12 | 13 | 13 | 13 | 14 | 15 | 16 | 15 | 14 | 13 | 13 |
| Feels °C (?) | 9 | 11 | 10 | 10 | 8 | 8 | 9 | 9 | 8 | 11 | 14 | 12 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 9 | 7 | 6 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Posties surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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