Surf Forecasts:
Flatrock surf forecast from 16 Jul 2026:
- Best quality surf: Friday 17 Jul, 9PM (local time) - 5ft (1.6m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 9PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,729 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 9PM (local time) - 5ft (1.6m), 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 Friday (Jul 17) at 9PM. The primary swell is predicted to be 1.6m and 15s period with a secondary swell of 0.5m and 6s. 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 4.0m 14s and forecast to arrive on Thursday (Jul 23) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 17th Jul) | 5ft (1.6m) 15s |
| Best Surf | 9PM (Fri 17th Jul) | 5ft (1.6m) 15s |
| Most Powerful | 9PM (Thu 23rd Jul) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a look at what we’ve got coming.
Alright, so Flatrock (Flatrock) is a reef setup, exposed to the southwest, and it’s a spot for advanced crew only. The water temp is sitting at 59.7°, which is pretty much dead average for this time of year, nothing weird going on there.
Now, right off the bat, I gotta be honest with you – the first few days are rough. Through the first week and a bit, the wind is just a constant problem. We’ve got a solid 8.2ft SW groundswell with a period of 16 seconds rolling in on Thursday the 16th, generating some serious wave energy (3603), but that cross-on wind is gonna trash it. It’s going to be choppy and messy. That trend continues through the next week – every time we get a decent pulse, the wind is either cross or cross-on, ruining the shape. There’s a gap of several days here where I wouldn’t bother paddling out.
The real standout, the one that deserves your full attention, comes much later. Sunday the 26th afternoon is our shining moment. That’s when a very long-period 16-second SW groundswell combines with a massive 11.5ft swell, and the wave energy goes through the roof at (10310). The wind goes light and variable, turning into a light cross-shore breeze. This is going to be a beautiful, powerful, and clean set of waves. That deep water reef at Flatrock is going to light up. The swell direction is right in the pocket for what this break wants. Just be warned, this is big – over 8.2ft, so experts only.
There’s also a nice little window before that. Saturday the 25th afternoon is a solid second look. You’ve got 8.2ft of SW swell, a clean cross-offshore wind, and that light breeze (2048 energy). This will be much more manageable than the Sunday beast, still offering excellent shape. Get on it early if you can.
Bottom line: don’t waste your time for the first week and a half. The wind is a dirty dog. But mark your calendar for Saturday the 25th afternoon and especially Sunday the 26th afternoon. That’s where the magic is.
Short Range ForecastMostly dry. Very mild (max 16°C on Sat night, min 13°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Sun afternoon, min 15°C on Sun afternoon). Wind will be generally light. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 14 | SW 13 | SW 13 | SW 13 | SW 19 | WSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SW 12 | SW 13 | SW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3559 | 2658 | 2270 | 1719 | 899 | 570 | 495 | 363 | 303 | 1859 | 1456 | 1597 | 1426 | 859 | 1485 | 1179 | 846 | 694 | 947 | 1072 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross-on | on | cross-on |
High Tide | 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 | |||||||
 |  | |  |  | | | | |  |  | | | | | | | |  |  | |
 | — | — | 7:31 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 14 | 14 | 13 | 14 | 15 | 14 | 15 | 16 | 14 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 16 | 15 | 15 | 13 |
Feels °C | 11 | 11 | 7 | 10 | 11 | 8 | 12 | 13 | 9 | 12 | 12 | 10 | 12 | 14 | 11 | 11 | 12 | 12 | 11 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | WSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | S 14 | SW 11 | SW 14 |
| kJ | 3559 | 2658 | 2270 | 1719 | 899 | 570 | 495 | 363 | 240 | 1859 | 1456 | 1597 | 1426 | 859 | 1485 | 1179 | 846 | 4 | 544 | 331 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 11 | — | S 10 | WNW 6 | — | — | WNW 6 | SW 19 | S 10 | SSW 10 | S 10 | S 10 | S 9 | — | — | — | — | S 14 | — |
| kJ | 44 | 21 | — | 8 | 19 | — | — | 30 | 303 | 55 | 20 | 18 | 17 | 7 | — | — | — | — | 4 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 21 | SW 15 | — | — | — | — | S 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 45 | 33 | — | — | — | — | 5 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 5 | — | NW 4 | NW 5 | — | NW 4 | NW 6 | — | — | — | — | — | NW 4 | — | SW 12 | SW 13 | SW 11 |
| kJ | — | — | — | 17 | — | 10 | 21 | — | 23 | 116 | — | — | — | — | — | 15 | — | 694 | 947 | 1072 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 74 | 42 | 42 | 42 | 44 | 44 | 44 | 44 | 44 | 42 | 44 | 74 | 78 | 0 | 44 | 151 | 74 | 294 | 315 | 871 |
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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