Surf Forecasts:
Flatrock surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 3PM (local time) - 15ft (4.5m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Thursday 13 Aug, 12AM (local time) - 16ft (5.0m), 16s period, SW swell with 11,823 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 3PM (local time) - 15ft (4.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Flatrock this week:
The surf forecast for Flatrock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 3PM. The primary swell is predicted to be 4.5m and 16s period with a secondary swell of 3.5m and 17s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Flatrock in the next 16 days are 5.0m 16s and forecast to arrive on Thursday (Aug 13) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 10s period and expected on Monday (Aug 17) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 12th Aug) | 15ft (4.5m) 16s |
| Best Surf | 3PM (Wed 12th Aug) | 15ft (4.5m) 16s |
| Most Powerful | 12AM (Thu 13th Aug) | 16ft (5.0m) 16s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Wed morning. Very mild (max 14°C on Wed morning, min 13°C on Wed morning). Winds decreasing (fresh winds from the WSW on Wed morning, light winds from the SSW by Fri morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Mon night, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12006 | 11029 | 11823 | 6564 | 5696 | 6772 | 5892 | 5540 | 4957 | 3953 | 3241 | 2328 | 1862 | 1604 | 1147 | 2008 | 1650 | 1055 | 1597 | 1078 | 653 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | cross-on | cross-on | cross | cross-off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross | cross |
High Tide | 1:05PM0.60m | 1:06AM0.23m | 1:27PM0.58m | 1:18AM0.29m | 1:44PM0.55m | 1:37AM0.36m | 1:57PM0.50m | 2:01AM0.41m | 2:07PM0.46m | 2:27AM0.45m | 2:15PM0.42m | 2:55AM0.47m | 2:20PM0.39m | 3:24AM0.46m | |||||||
Low Tide | 8:19PM0.08m | 6:18AM0.04m | 8:14PM0.09m | 6:55AM0.02m | 8:11PM0.09m | 7:28AM0.03m | 8:12PM0.07m | 7:58AM0.05m | 8:17PM0.04m | 8:26AM0.09m | 8:27PM0.01m | 8:52AM0.13m | 8:39PM0.00m | ||||||||
 |  |  |  | |  | | | | | | |  | |  | | | | | |  | |
 | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — |
 | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 15 | 16 | 17 | 17 | 19 | 18 |
Feels °C | 8 | 8 | 9 | 11 | 11 | 10 | 12 | 11 | 11 | 11 | 9 | 9 | 7 | 7 | 6 | 11 | 10 | 11 | 10 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 |
| kJ | 12006 | 11029 | 11823 | 6564 | 5696 | 6772 | 5892 | 5540 | 4957 | 3953 | 3241 | 2328 | 1862 | 1604 | 1147 | 2008 | 1650 | 1020 | 1597 | 1078 | 653 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 18 | SW 23 | SSW 21 | SW 19 | S 9 | ENE 5 | ENE 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 260 | 138 | 578 | 1055 | 7 | 9 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 26 | — | — | S 10 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 26 | — | — | 8 | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 17 | SW 17 | SW 16 | — | — | — | — | — | — | — | — | — | — | ESE 4 | SE 4 | SSE 10 | SE 10 | ENE 4 | NNE 4 | NNW 5 | WNW 6 |
| kJ | 8030 | 7582 | 6947 | — | — | — | — | — | — | — | — | — | — | 13 | 9 | 90 | 96 | 15 | 20 | 12 | 63 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 894 | 884 | 320 | 153 | 153 | 153 | 126 | 126 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 74 | 319 | 204 | 42 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Flatrock 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 Flatrock Surf forecast
The above surf forecast table for Flatrock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Flatrock can be found by selecting the local surf guide option on the grey menu. Our Flatrock 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 (Flatrock) 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 Flatrock 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.
Are you planning a holiday in Eyre Peninsula? If you are looking for accommodation near Flatrock, camping, hotels and holiday cottages in Eyre Peninsula, consider staying in Port Lincoln which is 49 km (30 miles) away.
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