Surf Forecasts:
Flatrock surf forecast from 27 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 12AM (local time) - 18ft (5.5m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Wednesday 29 Jul, 3AM (local time) - 20ft (6.0m), 16s period, SW swell with 16,497 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 12AM (local time) - 18ft (5.5m), 16s 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 Wednesday (Jul 29) at 12AM. The primary swell is predicted to be 5.5m and 16s period with a secondary swell of 4.0m and 16s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Flatrock in the next 16 days are 6.0m 16s and forecast to arrive on Wednesday (Jul 29) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 31) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 29th Jul) | 18ft (5.5m) 16s |
| Best Surf | 12AM (Wed 29th Jul) | 18ft (5.5m) 16s |
| Most Powerful | 3AM (Wed 29th Jul) | 20ft (6.0m) 16s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's get into it.
Flatrock. It's a reef break, and it's not a place for the faint of heart. We've got a 16-day window here, but it's a real mixed bag. The first week is a write-off. We're looking at a solid 4 days of nothing but onshore wind and blown-out junk. The swell is there, but the wind will ruin it. From Monday the 27th to Tuesday the 29th, it's just a mess of strong cross-onshore and near gale force winds. The water's sitting at 60°F with a flat anomaly, so pretty average for this time of year.
The first real glimmer of hope comes on Thursday, July 30th. That's the standout. The wind swings offshore, light from the ESE, and by the afternoon it's glassy. The swell is a clean 7ft to 8ft from the SSW, with a solid 13-second period, giving it some real push. The combined energy is moderate (1441 to 2167). This is a classic reef setup, and that long period will wrap in nicely. It's still an advanced wave, not for the learners. This is the best session on offer.
Friday, July 31st, is a step down. The swell drops to 4ft to 5ft, and the wind gets tricky. The morning has a cross-off breeze, keeping it clean, but the afternoon bumps up with a light cross-on. It's marginal, but you could still get a fun little one.
The next real standout is a long way off, but it's worth the wait. Tuesday, August 5th – the morning looks excellent. The wind is light offshore from the ENE, and the swell is a solid 7ft from the SW, with a very long 19-second period. The combined energy is strong (3065). That's proper groundswell. It'll be powerful and clean. Then on Thursday, August 6th, the afternoon is glassy with a 8ft, 16-second swell from the SW. The combined energy is strong (3216). Another excellent window.
The week of August 5th to 7th is the best run. The morning of Friday, August 7th is also excellent, with a gentle offshore and a 8ft, 17-second swell from the SW. The energy is very strong (4071). These are the days to circle. The rest of that second week, from August 8th onwards, it starts to get messy again with onshore winds and bigger, blown-out swells. By Monday, August 11th, it gets too big and the wind is on it, making it a full-on no-go for us.
So, overall: be patient. The first week is a washout. The best surf is on Thursday, July 30th and the run of mornings from Tuesday, August 5th through Friday, August 7th. That's your window. Don't sleep on it.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Very mild (max 14°C on Mon morning, min 11°C on Tue afternoon). Winds decreasing (near gales from the NNW on Mon morning, light winds from the SSW by Wed night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Sat afternoon, min 10°C on Sat morning). Winds increasing (calm on Thu morning, strong winds from the N by Sat night). | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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 | W 9 | WSW 11 | SW 15 | SW 15 | SW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 20 | SSW 18 | SW 16 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 595 | 859 | 1800 | 4044 | 4763 | 16026 | 6609 | 4803 | 2655 | 1830 | 1380 | 841 | 623 | 590 | 1044 | 1523 | 4331 | 3583 | 3820 | 4605 | 4578 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | off | glassy | off | cross-off | cross-on | cross-off | cross | cross-on | cross | cross | on | cross |
High Tide | 12:12PM0.52m | 00:30AM0.18m | 12:39PM0.56m | 00:43AM0.21m | 1:04PM0.58m | 1:02AM0.25m | 1:28PM0.59m | 1:25AM0.28m | 1:50PM0.58m | 1:50AM0.32m | 2:12PM0.56m | 2:18AM0.36m | 2:33PM0.52m | 2:48AM0.39m | |||||||
Low Tide | 8:04PM0.10m | 4:59AM0.10m | 8:03PM0.09m | 5:44AM0.06m | 8:10PM0.09m | 6:21AM0.04m | 8:19PM0.08m | 6:55AM0.02m | 8:31PM0.07m | 7:28AM0.02m | 8:45PM0.06m | 8:01AM0.04m | 8:59PM0.05m | ||||||||
 | |  |  | |  |  | | | | |  | | |  | | | | |  | | |
 | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — |
 | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — |
mm | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — |
Temp °C | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 14 | 14 | 13 | 13 | 12 |
Feels °C | 3 | 3 | 7 | 5 | 5 | 6 | 8 | 7 | 9 | 9 | 10 | 9 | 8 | 10 | 8 | 5 | 7 | 9 | 4 | 6 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 15 | SSW 16 | SSW 15 | SW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SSW 13 | SSW 18 | SW 16 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 |
| kJ | 595 | 418 | 580 | 1397 | 2919 | 16026 | 6609 | 4803 | 2655 | 1830 | 1380 | 841 | 623 | 590 | 1044 | 1523 | 4331 | 3583 | 3820 | 4605 | 4578 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | WSW 16 | — | — | — | — | — | S 8 | SSE 11 | S 10 | S 9 | SW 20 | SW 20 | SSW 13 | SW 21 | — | — | W 7 | — | — |
| kJ | 8 | 7 | 198 | — | — | — | — | — | 140 | 337 | 50 | 83 | 200 | 552 | 451 | 548 | — | — | 148 | — | — |
Swell 3 Height (m) Direction Period (s) | SSE 10 | — | — | — | — | — | — | — | — | — | S 24 | SSW 22 | SSE 9 | SSE 8 | — | SSE 8 | — | — | — | — | — |
| kJ | 19 | — | — | — | — | — | — | — | — | — | 11 | 45 | 30 | 39 | — | 6 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 6 | W 9 | WSW 11 | SW 15 | SW 15 | SSW 16 | — | — | — | — | — | — | N 3 | — | SE 8 | NNW 4 | NW 6 | NW 7 | — | — | — |
| kJ | 231 | 859 | 1800 | 4044 | 4763 | 7662 | — | — | — | — | — | — | 3 | — | 32 | 31 | 95 | 184 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 315 | 624 | 881 | 1195 | 1348 | 1120 | 1120 | 153 | 126 | 0 | 0 | 0 | 42 | 74 | 78 | 44 | 42 | 204 | 317 | 799 | 153 |
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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