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Posties Surf Forecast
/ SA – East Coast (28 breaks) / South Australia (91 breaks) /
Posties surfForecast / SA – East Coast / Australia
12 Day Weather and Surf, issued 2 am Thursday 17 Apr 2025 ACST
Best Forecast Surf Conditions for Posties this week:
The surf forecast for Posties over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Apr 17) at 6AM. The primary swell is predicted to be 2.3m and 15s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Posties in the next 12 days are 3.0m 17s and forecast to arrive on Tuesday (Apr 22) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Saturday (Apr 19) at 3PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 17th Apr) | 7.5ft (2.3m) 15s |
| Best Surf | 12AM (Fri 18th Apr) | 10ft (3.0m) 15s |
| Most Powerful | 9AM (Tue 22nd Apr) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Posties over the next 12 days.
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 15 | 14 | 15 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 8 | 14 | 17 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 14 | 16 | 16 | 14 | 13 | 13 | 13 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 3080 | 3644 | 4046 | 4263 | 3357 | 2090 | 1945 | 1460 | 1326 | 1003 | 1031 | 711 | 1483 | 1276 | 2590 | 5653 | 4350 | 3804 | 2805 | 2405 | 1762 | 1018 | 1123 | 1269 | 2332 | 1600 | 3280 | 7989 | 7317 | 4160 | 2553 | 2737 | 2522 | 1602 | 1404 | 846 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | glass | cross | cross- on | cross- off | cross- off | cross | cross- off | cross- off | off | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- off | cross- on | glass | cross- off | on | cross- on | cross | cross | cross | cross- on | cross- on | cross | cross- on | cross | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 2:31PM 1.11 | 12:57AM 0.74 | 3:01PM 1.09 | 12:47AM 0.73 | 3:36PM 1.05 | 12:03AM 0.75 | 4:24PM 0.99 | 6:20PM 0.92 | 9:40PM 0.93 | 10:32PM 0.93 | 11:23AM 0.72 | 11:04PM 0.90 | 11:25AM 0.84 | 11:27PM 0.85 | 11:45AM 0.96 | 11:43PM 0.77 | 12:11PM 1.06 | 11:51PM 0.70 | 12:40PM 1.13 | 11:51PM 0.66 | ||||||||||||||||
Low Tide / height (m) | 8:52PM 0.60 | 7:29AM 0.20 | 9:25PM 0.67 | 7:45AM 0.23 | 10:14PM 0.74 | 8:00AM 0.28 | 8:08AM 0.35 | 7:53AM 0.44 | 6:56AM 0.51 | 5:58AM 0.55 | 4:33PM 0.57 | 5:31AM 0.53 | 5:30PM 0.50 | 5:24AM 0.49 | 6:15PM 0.47 | 5:25AM 0.42 | 6:55PM 0.46 | 5:33AM 0.33 | 7:31PM 0.49 | |||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | |||||||||||||||||||||||||
| Sunrise | 6:33 | - | - | 6:35 | - | - | 6:35 | - | - | 6:37 | - | - | 6:37 | - | - | 6:39 | - | - | 6:39 | - | - | 6:41 | - | - | 6:41 | - | - | 6:43 | - | - | 6:43 | - | - | 6:43 | - | - |
| Sunset | - | 5:37 | - | - | 5:36 | - | - | 5:35 | - | - | 5:34 | - | - | 5:31 | - | - | 5:30 | - | - | 5:30 | - | - | 5:28 | - | - | 5:27 | - | - | 5:25 | - | - | 5:24 | - | - | 5:22 | - |
 | |  | | | |  |  | | | | | | |  |  | | | | | | | |  | | | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | 1 | - | - | - | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 3 | - | - | - | - | - | - |
| Temp. °C | 22 | 19 | 15 | 18 | 18 | 16 | 24 | 20 | 18 | 19 | 14 | 16 | 14 | 14 | 13 | 14 | 14 | 15 | 18 | 17 | 16 | 20 | 17 | 15 | 13 | 12 | 13 | 14 | 15 | 14 | 13 | 13 | 14 | 13 | 13 | 13 |
| Feels °C (?) | 20 | 17 | 14 | 15 | 17 | 15 | 22 | 19 | 15 | 12 | 8 | 14 | 9 | 9 | 9 | 9 | 9 | 13 | 17 | 15 | 16 | 19 | 15 | 13 | 5 | 4 | 7 | 8 | 10 | 6 | 6 | 6 | 6 | 6 | 7 | 7 |
Short Range Forecast: Some drizzle, heaviest during Sat morning. Warm (max 24°C on Sat morning, min 14°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sat night). | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Very mild (max 19°C on Sun morning, min 13°C on Mon night). Winds decreasing (fresh winds from the NNE on Sun morning, light winds from the ENE by Tue night). | Days 6-9 Weather Summary Mostly dry. Warm (max 20°C on Thu morning, min 12°C on Fri afternoon). Winds increasing (calm on Wed night, strong winds from the SE by Fri morning). | Long Range Forecast: Light rain (total 4mm), mostly falling on Sat afternoon. Very mild (max 15°C on Sat afternoon, min 12°C on Sat morning). Winds decreasing (strong winds from the SSE on Sat night, light winds from the SSE by Mon night). | |||||||||||||||||||||||||||||||||
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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
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.
Information about the Posties Surf forecast
The above surf forecast table for Posties provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Posties can be found by selecting the local surf guide option on the grey menu. Our Posties surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Posties) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Posties may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Posties is 7 km (4 miles) from Allendale East. If you plan a holiday in South Australia - East Coast, look for hotels and other accommodation in Allendale East. Allendale East has rooms for a wide range of budgets as well as car hire and transport links.
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