Surf Forecasts:
Flatrock surf forecast from 17 Jun 2026:
- Best quality surf: Sunday 21 Jun, 3AM (local time) - 6.5ft (2.0m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 19 Jun, 12AM (local time) - 11ft (3.5m), 20s period, SW swell with 7,969 kJ wave energy.
- Next surfable swell (1★+): Sunday 21 Jun, 3AM (local time) - 6.5ft (2.0m), 15s period with SSW 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 Sunday (Jun 21) at 3AM. The primary swell is predicted to be 2.0m and 15s period with a secondary swell of 1.6m and 9s. 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 20s and forecast to arrive on Friday (Jun 19) 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 1.4m 6s period and expected on Tuesday (Jun 23) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 21st Jun) | 6.5ft (2.0m) 15s |
| Best Surf | 3AM (Sun 21st Jun) | 6.5ft (2.0m) 15s |
| Most Powerful | 12AM (Fri 19th Jun) | 11ft (3.5m) 20s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 10mm), heaviest on Thu afternoon. Very mild (max 15°C on Thu afternoon, min 12°C on Thu morning). Winds decreasing (near gales from the N on Thu morning, light winds from the SSE by Sat night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Very mild (max 15°C on Mon night, min 12°C on Tue night). Winds increasing (calm on Sun morning, fresh winds from the SE by Tue afternoon). | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
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) | WNW 8 | WNW 8 | SW 20 | SW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 14 | SW 14 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 574 | 448 | 7969 | 7537 | 7018 | 5433 | 4340 | 3034 | 1140 | 928 | 1049 | 1305 | 1140 | 918 | 1761 | 1680 | 2228 | 2927 | 2292 | 1834 | 1487 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | glassy | cross | cross | cross-on | cross-on | cross-off | cross-off | cross-off | off | off | off |
High Tide | 2:36PM0.56m | 00:59AM0.20m | 3:02PM0.51m | 1:53AM0.23m | 3:23PM0.45m | 3:02AM0.25m | 3:38PM0.39m | 4:33AM0.27m | 3:45PM0.35m | 6:51AM0.30m | 3:22PM0.30m | 9:07AM0.36m | |||||||||
Low Tide | 10:16PM0.19m | 7:09AM0.03m | 10:17PM0.19m | 7:50AM0.08m | 10:24PM0.18m | 8:32AM0.14m | 10:40PM0.16m | 9:20AM0.21m | 11:08PM0.14m | 11:01AM0.28m | 11:47PM0.12m | 00:41AM0.12m | |||||||||
 |  |  | |  |  |  | |  | | | | |  | | | | | | | | |
 | 7:33 | — | — | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — |
 | — | 5:23 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — |
mm | 2 | 3 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — |
Temp °C | 13 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 15 | 14 | 13 | 13 | 12 | 13 | 12 |
Feels °C | 2 | 8 | 4 | 7 | 4 | 6 | 6 | 8 | 8 | 10 | 12 | 11 | 7 | 8 | 10 | 10 | 7 | 7 | 5 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | — | SW 18 | SW 17 | SW 16 | SW 16 | SSW 15 | SW 15 | SW 14 | SW 14 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
| kJ | 244 | 212 | — | 2216 | 3538 | 5021 | 2925 | 3034 | 1140 | 928 | 1049 | 1305 | 1140 | 918 | 1761 | 1680 | 2228 | 2927 | 2292 | 1834 | 1487 |
Swell 2 Height (m) Direction Period (s) | SSW 24 | SW 22 | — | — | — | — | — | SW 15 | SSW 10 | S 9 | S 9 | — | SSE 8 | — | — | — | — | — | — | — | — |
| kJ | 56 | 235 | — | — | — | — | — | 2309 | 363 | 194 | 96 | — | 22 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 8 | NE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 8 | WNW 8 | SW 20 | SW 18 | SSW 17 | SSW 16 | SSW 16 | S 10 | — | — | — | — | NW 4 | NW 4 | — | — | SSE 5 | — | — | — | E 5 |
| kJ | 574 | 448 | 7969 | 7537 | 7018 | 5433 | 4340 | 951 | — | — | — | — | 15 | 29 | — | — | 67 | — | — | — | 27 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 692 | 692 | 816 | 1339 | 881 | 153 | 153 | 153 | 74 | 0 | 0 | 42 | 44 | 162 | 162 | 153 | 198 | 213 | 152 | 0 | 0 |
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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