Surf Forecasts:
Flatrock surf forecast from 16 Jul 2026:
- Best quality surf: Thursday 16 Jul, 9PM (local time) - 8ft (2.4m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 16 Jul, 3PM (local time) - 8ft (2.5m), 16s period, SW swell with 3,559 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 9PM (local time) - 8ft (2.4m), 15s 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 Thursday (Jul 16) at 9PM. The primary swell is predicted to be 2.4m and 15s period with a secondary swell of 0.3m and 11s. 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 2.5m 16s and forecast to arrive on Thursday (Jul 16) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 16th Jul) | 8ft (2.4m) 15s |
| Best Surf | 9PM (Thu 16th Jul) | 8ft (2.4m) 15s |
| Most Powerful | 3PM (Thu 16th Jul) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
G'day, Rusty here. We’ve got a 16-day window, but it’s a slow burn before the real fire shows. The first week is a bit of a write-off, with only marginal surf and messy winds. The standout action is all in the second week, and it’s not for the faint-hearted.
Kicking off at Flatrock (reef), the water is sitting at 60°, which is pretty much bang on average for this time of year. The first recommendation is Thursday the 16th in the morning. A solid 7ft SW swell is rolling in, with a very long 14-second period, and the wind is a clean cross-off from the NNE at 12 mph. This is the pick of the first week by a long shot, with a massive combined energy of 3216, meaning there’s plenty of grunt in the water. The offshore wind will keep it clean, but advanced surf only. This is a reef break, and that long period means the sets will be well-spaced and powerful.
After that, it gets sloppy. Friday and Saturday see dropping swell, changing winds, and a cross-chop that kills the quality. Sunday the 19th, the swell bumps up to 6ft and a very long 18 seconds in the afternoon, but the onshore wind ruins it. Monday the 20th and Tuesday the 21st are similarly marginal. Wednesday the 22nd and Thursday the 23rd offer a small window of clean-ish conditions, but the swell is a mixed bag.
Now, the real story starts on Thursday the 30th of July. The morning brings an 8ft SSW swell with a 14-second period, and the wind is a sweet cross-off from the SSE at 12 mph. The combined energy hits 3847, and it’s clean. This is a solid option for advanced surfers. The afternoon only gets better: 10ft SSW, 16-second period, and the same clean cross-off wind. The energy jumps to 5840. This is the standout session of the week.
But the absolute peak is Friday the 31st of July. The morning delivers an 12ft SW groundswell with a 19-second period, a light offshore from the east at 6 mph, and a combined energy of 9105. The forecast is exceptional, but this is strictly for experts. With that size and period, it’s going to be a freight train. The afternoon is even bigger, with the same 12ft SW swell and 18-second period, and a cross-off breeze. The energy rockets to 15046. Crowds are possible, but the size will keep most out.
For the first week, you’re better off waiting. The best bet is the Thursday the 16th morning session for a clean, powerful wave. The second week has the real gems, but it’s all big, serious swell. Beginners, stay in the car park.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Sat night, min 13°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Sun afternoon, min 13°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||
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 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | WSW 12 | SW 18 | SW 16 | WSW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SW 13 | SW 13 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2004 | 3559 | 2658 | 2270 | 1719 | 899 | 637 | 545 | 411 | 387 | 1798 | 1571 | 1508 | 1340 | 792 | 1324 | 1053 | 450 | 563 | 680 | 1253 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross-on | cross-off | cross-on | on | cross |
High Tide | 2:06PM0.59m | 1:34AM0.23m | 2:27PM0.54m | 2:06AM0.29m | 2:42PM0.49m | 2:43AM0.33m | 2:54PM0.44m | 3:23AM0.36m | 3:02PM0.40m | 4:08AM0.37m | 3:03PM0.36m | 4:59AM0.37m | 2:50PM0.33m | ||||||||
Low Tide | 9:15PM0.13m | 7:10AM0.03m | 9:13PM0.13m | 7:49AM0.05m | 9:14PM0.12m | 8:26AM0.09m | 9:21PM0.09m | 9:02AM0.15m | 9:34PM0.07m | 9:39AM0.21m | 9:51PM0.06m | 10:18AM0.26m | 10:08PM0.06m | ||||||||
 | |  | | |  | |  | |  | |  | | | | | | | | | | |
 | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — |
 | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 14 | 13 | 14 | 15 | 13 | 15 | 16 | 14 | 16 | 16 | 15 | 16 | 16 | 15 | 15 | 15 | 14 | 15 | 14 |
Feels °C | 9 | 10 | 10 | 7 | 10 | 12 | 7 | 11 | 13 | 9 | 12 | 12 | 10 | 13 | 14 | 12 | 13 | 15 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | WSW 12 | SW 18 | SW 16 | WSW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SW 13 | SW 13 | SW 14 |
| kJ | 2004 | 3559 | 2658 | 2270 | 1719 | 899 | 637 | 545 | 411 | 387 | 1798 | 1571 | 1508 | 1340 | 792 | 1324 | 1053 | 450 | 563 | 680 | 1253 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | S 12 | S 11 | S 10 | S 10 | WNW 6 | WNW 6 | — | WNW 6 | SW 19 | S 10 | NW 6 | SSW 10 | S 10 | SSW 18 | — | — | SW 14 | S 14 | S 13 | — |
| kJ | 1186 | 44 | 21 | 9 | 8 | 12 | 13 | — | 20 | 303 | 78 | 58 | 19 | 17 | 31 | — | — | 293 | 4 | 4 | — |
Swell 3 Height (m) Direction Period (s) | S 12 | — | — | — | — | — | — | — | SSW 21 | SW 15 | — | S 10 | — | — | S 9 | — | — | S 14 | — | — | — |
| kJ | 26 | — | — | — | — | — | — | — | 45 | 33 | — | 51 | — | — | 7 | — | — | 4 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 5 | — | N 3 | WNW 5 | — | NW 6 | NW 6 | — | NW 5 | — | — | — | — | — | — | — | SSW 4 |
| kJ | — | — | — | — | 24 | — | 5 | 18 | — | 60 | 67 | — | 55 | — | — | — | — | — | — | — | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 74 | 42 | 42 | 42 | 42 | 44 | 44 | 44 | 44 | 78 | 44 | 44 | 78 | 44 | 44 | 151 | 0 | 42 | 42 | 126 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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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