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Flatrock Surf Forecast
/ SA – Eyre Peninsula (19 breaks) / South Australia (91 breaks) /
Surf Forecasts:
Flatrock surfForecast / SA – Eyre Peninsula / Australia
16 Day Weather and Surf, issued 8 pm Wednesday 20 May 2026 ACSTForecast update in hr min s Forecast update imminent
Flatrock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Flatrock sea temperature is
17.7° C
(Which is normal for this time of year)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 Thursday (May 21) at 3AM. The primary swell is predicted to be 2.0m and 15s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Flatrock in the next 16 days are 3.5m 10s and forecast to arrive on Sunday (May 24) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Friday (May 22) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 21st May) | 6.5ft (2.0m) 15s |
| Best Surf | 3AM (Thu 21st May) | 6.5ft (2.0m) 15s |
| Most Powerful | 6PM (Sun 24th May) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Sat afternoon. Very mild (max 18°C on Fri afternoon, min 14°C on Thu morning). Winds increasing (calm on Wed night, fresh winds from the N by Sat morning). | Days 5-7 Weather SummaryHeavy rain (total 25mm), heaviest during Sat night. Very mild (max 16°C on Mon morning, min 12°C on Sat night). Winds increasing (calm on Sat night, near gales from the SSW by Sun night). | ||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | Wed 27 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 9 | SSW 10 | SSW 10 | S 9 | SW 15 | SW 14 | SW 16 | SW 14 | SW 14 | SSW 13 | SW 13 | |
1741 | 1480 | 1236 | 569 | 992 | 1630 | 1271 | 834 | 629 | 1006 | 1301 | 1797 | 1522 | 800 | 509 | 840 | 1208 | 915 | 731 | 820 | 613 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross-off | cross-on | cross-off | cross-off | cross | cross-off | cross | cross-on | glassy | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 11:25PM0.22m | 2:56PM0.52m | 3:26PM0.46m | 3:53PM0.39m | 4:15PM0.32m | 12:25PM0.29m | 7:54PM0.27m | 10:49AM0.35m | 9:27PM0.26m | 10:53AM0.42m | |||||||||||
Low Tide | 10:25PM0.22m | 6:44AM-0.03m | 7:08AM0.02m | 7:23AM0.08m | 7:00AM0.15m | 4:17AM0.19m | 5:06PM0.27m | 3:26AM0.16m | 5:21PM0.22m | 3:33AM0.13m | 5:46PM0.18m | ||||||||||
 |  | |  |  | |  | |  |  |  | |  | | | | | | | | | |
 | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — |
 | — | — | 5:30 | — | — | 5:30 | — | — | 5:29 | — | — | 5:29 | — | — | 5:28 | — | — | 5:28 | — | — | 5:27 |
— | — | — | — | — | — | — | — | 1 | 14 | 4 | 1 | 4 | 2 | — | — | — | — | — | — | — | |
Temp °C | 16 | 16 | 17 | 17 | 17 | 18 | 17 | 17 | 16 | 14 | 14 | 15 | 15 | 16 | 16 | 15 | 16 | 16 | 16 | 16 | 16 |
16 | 14 | 15 | 14 | 12 | 14 | 11 | 11 | 11 | 8 | 8 | 6 | 6 | 8 | 10 | 9 | 11 | 11 | 13 | 12 | 11 | |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SW 16 | SW 14 | SW 13 | SW 13 | SSW 13 | — | — | SW 16 | SW 12 | SW 15 | SW 14 | SW 16 | SW 14 | SW 14 | SSW 13 | SW 13 |
 kJ | 1741 | 1480 | 1236 | 569 | 992 | 1630 | 1271 | 834 | 629 | 261 | — | — | 42 | 89 | 509 | 840 | 1208 | 915 | 731 | 820 | 613 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 16 | — | — | — | SSW 16 | — | E 5 | — | — | SW 20 | SSW 16 | SW 11 | S 9 | S 7 | SSW 9 | — | SSW 22 | SW 21 |
| kJ | — | — | — | 129 | — | — | — | 166 | — | 2 | — | — | 15 | 177 | 82 | 6 | 93 | 15 | — | 46 | 109 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | ENE 5 | — | — | — | S 14 | S 13 | — | — | — | — | WSW 22 | SW 20 |
| kJ | — | — | — | — | — | — | — | — | — | 2 | — | — | — | 15 | 13 | — | — | — | — | 46 | 147 |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 3 | N 4 | NW 5 | NNW 4 | NNW 5 | NW 6 | SW 13 | SSW 9 | SSW 10 | SSW 10 | S 9 | S 8 | S 8 | SSE 7 | S 7 | S 7 | — | — |
| kJ | — | — | — | 3 | 12 | 20 | 28 | 56 | 60 | 1006 | 1301 | 1797 | 1522 | 800 | 454 | 217 | 181 | 77 | 57 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 42 | 0 | 42 | 78 | 44 | 44 | 44 | 44 | 78 | 0 | 315 | 577 | 294 | 485 | 1071 | 152 | 361 | 152 | 74 | 213 | 1120 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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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