Surf Forecasts:
Flatrock surf forecast from 23 Jul 2026:
- Best quality surf: Thursday 30 Jul, 12AM (local time) - 7.5ft (2.3m), 13s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 23 Jul, 9PM (local time) - 13ft (4.0m), 15s period, SW swell with 7,222 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 12AM (local time) - 7.5ft (2.3m), 13s 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 Thursday (Jul 30) at 12AM. The primary swell is predicted to be 2.3m and 13s period with a secondary swell of 0.7m and 18s. The wind is predicted to be offshore as the swell arrives.
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 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Thursday (Jul 30) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 30th Jul) | 7.5ft (2.3m) 13s |
| Best Surf | 12AM (Thu 30th Jul) | 7.5ft (2.3m) 13s |
| Most Powerful | 9PM (Thu 23rd Jul) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
Alright, let’s talk about Flatrock. It’s a reef setup, so it’s for the advanced guys. We’ve got a slow burn to start, but there’s some serious juice in the long-range.
We’re kicking off on Thursday, July 23rd. The swell is a solid 13 ft from the SW, with a 14-second period. That’s a powerful groundswell, but the wind is a cross-shore from the SSW at 19 mph, making things lumpy. The combined energy is a hefty 9842, so there’s plenty of water moving, but the quality is marginal.
Friday the 24th drops to 10 ft from the SSW with a 15-second period, but the wind goes cross-onshore from the WSW, bringing a chop. Not your best bet.
Saturday the 25th through Monday the 27th is a write-off – poor conditions with onshore winds up to 25 mph making it messy. You’re looking at a couple of days off.
Now, Tuesday, July 28th shows a pulse. The morning has 8 ft from the SW at a very long 17-second period, with cross-shore winds at 16 mph. The afternoon gets better: 10 ft SW swell, 16-second period, and the energy jumps to 9806. The wind stays cross-shore, so it’ll be powerful and workable for the experienced.
Wednesday, July 29th is the one to circle. You’ve got 10 ft from the SSW with a 14-second period, but the wind turns cross-offshore from the SE and ESE at 12 mph. It’s clean. The energy is 4275, and the shape is going to be good. This is your window.
Thursday, July 30th is a classic. The swell drops to 6 ft from the SSW, but the wind goes offshore from the east at 6 to 9 mph. The wave comment says “excellent surf conditions for experienced surfers.” It’s going to be glassy and perfect for carving up the reef.
Moving into early August, Saturday the 1st morning is clean with 7 ft from the SW and a 16-second period, with light cross-offshore breezes (4185 energy). Sunday the 2nd morning is similar, with 8 ft SW swell and a 16-second period. But Sunday afternoon is the big one: 10 ft with a very long 20-second period, and the combined energy is a massive 13104. That’s a beast of a swell. At Flatrock’s reef, it’ll produce some heavy tubes, but this is expert territory only.
Monday, August 3rd still has size – 12 ft SW at 18 seconds in the morning (7786 energy) – but the wind picks up. After that, the swell fades through the rest of the week.
My picks for the best on offer: Wednesday, July 29th for the clean power and good wind, and Sunday afternoon, August 2nd if you’re a charger looking for a serious challenge. For a glassy, fun session, Thursday, July 30th is a treat.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat morning. Very mild (max 15°C on Sat afternoon, min 12°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Very mild (max 15°C on Mon afternoon, min 12°C on Tue night). Winds increasing (light winds from the W on Sun morning, strong winds from the NW by Mon morning). | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 12 | SSW 12 | SW 12 | SW 12 | SW 11 | SW 13 | SW 13 | SW 15 | SW 17 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5918 | 6601 | 4920 | 4136 | 3183 | 2061 | 1648 | 2040 | 988 | 857 | 843 | 611 | 1102 | 711 | 685 | 4243 | 4547 | 4585 | 3997 | 2759 | 1753 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross | cross | cross-off | cross-off | cross-off | off |
High Tide | 1:25PM0.32m | 9:36AM0.38m | 11:03AM0.43m | 11:41AM0.48m | 00:33AM0.15m | 12:12PM0.52m | 00:30AM0.18m | 12:39PM0.56m | 00:43AM0.21m | 1:04PM0.58m | 1:02AM0.25m | ||||||||||
Low Tide | 11:31AM0.32m | 10:24PM0.07m | 10:29PM0.09m | 9:39PM0.11m | 8:23PM0.11m | 3:47AM0.13m | 8:04PM0.10m | 4:59AM0.10m | 8:03PM0.09m | 5:44AM0.06m | 8:10PM0.09m | ||||||||||
 |  |  | | |  |  |  |  |  | | | | |  | | | | | | | |
 | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — |
 | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — |
mm | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | 2 | — | — | 1 | — | — | — |
Temp °C | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 13 | 13 | 13 | 12 | 12 | 12 |
Feels °C | 5 | 5 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 11 | 10 | 7 | 8 | 9 | 8 | 7 | 8 | 7 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 12 | SSW 12 | SW 12 | SW 12 | SW 11 | SW 13 | SW 13 | SW 15 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
| kJ | 5918 | 6601 | 4920 | 4136 | 3183 | 2061 | 1648 | 2040 | 988 | 857 | 843 | 611 | 1102 | 711 | 685 | 2522 | 3598 | 4585 | 3997 | 2759 | 1753 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 18 | — | SW 16 | SSE 12 | SW 15 | SW 15 | SSE 10 | S 10 | SW 11 | — | WSW 11 | WSW 12 | SW 22 | SW 20 | SW 18 |
| kJ | — | — | — | — | — | — | 12 | — | 67 | 27 | 176 | 232 | 19 | 7 | 31 | — | 1661 | 1220 | 118 | 192 | 319 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SSE 11 | S 10 | — | — | S 9 | — | — | SW 22 | SW 21 | SW 20 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 42 | 8 | — | — | 2 | — | — | 75 | 160 | 309 | — |
Wind waves Height (m) Direction Period (s) | SSW 14 | SW 15 | — | — | — | — | — | SW 13 | — | — | — | — | NNW 4 | NW 6 | WNW 8 | SW 17 | SW 16 | SSW 15 | — | — | — |
| kJ | 3924 | 4833 | — | — | — | — | — | 1559 | — | — | — | — | 19 | 154 | 434 | 4243 | 4547 | 4033 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 153 | 901 | 126 | 126 | 361 | 361 | 164 | 294 | 153 | 42 | 42 | 42 | 315 | 316 | 164 | 153 | 153 | 89 | 126 | 74 | 0 |
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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