
Surf Forecasts:
Flatrock surf forecast from 20 Jul 2026:
- Most powerful swell: Thursday 23 Jul, 3PM (local time) - 13ft (4.0m), 15s period, SW swell with 7,151 kJ wave energy.
Best Forecast Surf Conditions for Flatrock this week:
The most powerful waves expected at Flatrock in the next 16 days are 4.0m 15s and forecast to arrive on Thursday (Jul 23) at 3PM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Thu 23rd Jul) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
We’ve got a bit of a slow start, but don’t write it off just yet. The first real surf worth paddling out for isn’t until Thursday the 23rd of July, so there’s a few days of waiting. The early part of the week is a write-off – messy winds, lumpy conditions, and the kind of energy that just makes you want to stay on the beach. But hold on to your leggies, because it gets interesting.
The standout window is Thursday the 23rd of July at Flatrock (reef). This spot is an advanced reef break, exposed to the SW swell, and it’s fairly consistent. Thursday morning is looking at a solid 13ft of SW swell with a long period of 14 seconds, and the combined energy is a massive 10737 – that’s some serious power. The cross-shore wind is fresh, so it’ll be lumpy, but the wave quality is there for the experienced crew. The afternoon cleans up a touch with a 13ft SW swell at 15 seconds and even more energy at 12170. The wind is still cross, but it’s a moderate breeze. This is the pick of the entire forecast. The water temp is sitting at 60°, which is about average for the time of year, so no surprises there.
Now, the swell stays big, but the wind turns ugly. Friday the 24th through Sunday the 26th see the swell dropping from 10ft down to 6ft, but the onshore wind is a constant problem. It’s choppy, lumpy, and cross-onshore – not worth your time. The combined energy drops from 3440 to 1000, so the grunt is there but it’s just a mess.
There’s a potential glimmer on Tuesday the 28th of July. The afternoon shows a 8ft SW swell with a very long period of 16 seconds, and the combined energy is 4292. The wind switches to a light cross-offshore from the SSE at only 3 mph, and the report says it’s clean. That’s a rare treat, but the swell is still solid and the break is a reef, so it’s for experts only. The crowd factor is “sometimes” at Flatrock, so you might have company, but it’s not Gridlock City.
The first week of August is a no-go. The swell is huge – 16ft on the 1st of August, then 13ft, and the wind is howling onshore or cross-shore at 28 to 28 mph. The combined energy numbers are off the charts (19759 on the 1st), but it’s too big and too windy for any kind of paddle surfing. For a reef break, that’s a straight-up safety hazard for all but the most insane. This setup looks more like a kite surfing playground than a paddle spot.
So, to wrap it up: the first real wave is Thursday the 23rd of July, with a second chance on Tuesday the 28th of July. The rest is either flat, windy, or too big. Don’t get your hopes up for the long range – it’s promising but very uncertain.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue night. Very mild (max 16°C on Tue afternoon, min 11°C on Wed night). Winds increasing (light winds from the W on Tue afternoon, fresh winds from the SSW by Wed night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu morning. Very mild (max 14°C on Sat morning, min 11°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 13 | SW 11 | SW 14 | SW 14 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SW 12 | SW 11 |
Wave Graph | |||||||||||||||||||||
1377 | 1776 | 1608 | 1137 | 974 | 1092 | 1285 | 1452 | 5726 | 6336 | 7151 | 4487 | 3440 | 3316 | 2518 | 2146 | 1909 | 1498 | 1138 | 945 | 563 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on |
High Tide | 3:02PM0.40m | 4:08AM0.37m | 3:03PM0.36m | 4:59AM0.37m | 2:50PM0.33m | 6:14AM0.37m | 1:25PM0.32m | 9:36AM0.38m | 11:03AM0.43m | 11:41AM0.48m | 00:33AM0.15m | ||||||||||
Low Tide | 9:34PM0.07m | 9:39AM0.21m | 9:51PM0.06m | 10:18AM0.26m | 10:08PM0.06m | 11:31AM0.32m | 10:24PM0.07m | 10:29PM0.09m | 9:39PM0.11m | 8:23PM0.11m | |||||||||||
7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | |
— | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | |
mm | — | — | — | — | 1 | 2 | 1 | 1 | 1 | 1 | — | — | — | — | 2 | 1 | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 15 | 16 | 15 | 13 | 14 | 12 | 11 | 12 | 12 | 12 | 12 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
Feels °C | 9 | 12 | 11 | 11 | 14 | 12 | 7 | 8 | 4 | 4 | 6 | 7 | 7 | 7 | 9 | 9 | 8 | 9 | 10 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 13 | SW 11 | SW 14 | SW 14 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SW 12 | SW 11 |
1377 | 1776 | 1608 | 1137 | 974 | 1092 | 905 | 1452 | 5726 | 6336 | 7151 | 4487 | 3440 | 3316 | 2518 | 2146 | 1909 | 1498 | 1138 | 945 | 563 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | — | — | S 14 | — | SW 14 | — | — | — | — | — | — | — | WSW 18 | — | — | — | SW 15 | SW 15 |
8 | 8 | 7 | — | — | 4 | — | 305 | — | — | — | — | — | — | — | 31 | — | — | — | 55 | 178 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 13 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | NW 5 | — | — | — | — | SW 12 | SW 13 | SW 12 | SSW 14 | SW 15 | SSW 15 | — | — | — | — | — | — | — | — | — | — |
53 | — | — | — | — | 748 | 1285 | 1180 | 3685 | 4401 | 5019 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 151 | 151 | 44 | 44 | 151 | 162 | 881 | 894 | 692 | 153 | 198 | 153 | 238 | 361 | 198 | 884 | 894 | 317 | 742 | 871 | 153 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










