Surf Forecasts:
Flatrock surf forecast from 27 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 9PM (local time) - 16ft (5.0m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Wednesday 29 Jul, 3AM (local time) - 20ft (6.0m), 16s period, SSW swell with 18,104 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 9PM (local time) - 16ft (5.0m), 14s 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 Tuesday (Jul 28) at 9PM. The primary swell is predicted to be 5.0m and 14s period with a secondary swell of 0.7m and 13s. Another secondary swell of 3.5m and 14s is also forecast. 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-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 04) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 28th Jul) | 16ft (5.0m) 14s |
| Best Surf | 9PM (Tue 28th Jul) | 16ft (5.0m) 14s |
| 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, let’s talk Flatrock. This is a reef break, a proper advanced wave, so don’t even think about it if you’re not comfortable in big, powerful surf. The first real chance to get wet isn’t until Thursday, July 30th. Tuesday and Wednesday the 28th and 29th are total losses—Tuesday is a mess with 10ft to 12ft of lumpy, cross-onshore junk (combined energy of 5297 and 7513), and Wednesday is still messy with cross-shore winds.
Thursday morning, July 30th, is the first glimmer. The swell drops to a cleaner 8ft from the SSW, with a long 13-second period, and the wind goes glassy. That’s as clean as it gets. The combined energy is still strong at 1844. The afternoon stays glassy with 7ft. These are big waves, so it’s for experienced surfers only, and with that period, you’ll be waiting between sets.
Friday, July 31st, is a small day, with the swell dropping to 5ft. The wind is clean and cross-off in the morning, making for tidy conditions. The combined energy is weak at 913. If you want a relaxed session, this is it.
The weekend gets rowdy. Saturday, August 1st, jumps to 8ft from the SW with an 18-second period, a proper groundswell, but the wind is a fresh cross-shore, making it lumpy. The combined energy is 3244. Sunday, August 2nd, is cleaner with cross-off winds and 8ft to 8ft waves, and the energy is solid at 3057. That’s the better weekend slot.
Monday, August 3rd, holds 10ft in the morning with clean cross-off winds and a combined energy of 3025. It’s big, but manageable for the advanced crew. The real standout is Wednesday, August 5th. The morning has 8ft from the SW, an 18-second period, clean cross-off wind, and a combined energy of 3753. That’s a heavy session.
Looking ahead, Tuesday, August 4th, has a 21-second period in the afternoon, which is incredibly long, but the waves are only 5ft and the wind is cross-shore. That long period on a reef can be magic, but it’s a gamble with the chop. Thursday, August 6th, is clean again in the morning with 8ft, but the energy is dropping.
The second week, from August 8th onward, is a rough one. The swell stays over 8ft, sometimes hitting 13ft, but the wind is almost always cross-on or onshore. The combined energy readings are in the 4000s and 5000s, meaning there’s a ton of power, but it’s going to be blown out and lumpy. Wednesday, August 12th, is the last call, with a 13ft SSW swell, light cross-on wind, and a combined energy of 6331. It’s a beast for the experts.
The pick of the bunch is Thursday, July 30th, for the glassy, clean conditions with solid size, or Wednesday, August 5th, for the clean, powerful groundswell. Crowds are rare here, but it’s a serious reef.
Rusty.
Short Range ForecastMostly dry. Very mild (max 13°C on Tue morning, min 11°C on Tue night). Winds decreasing (strong winds from the SW on Tue afternoon, calm by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Very mild (max 15°C on Sat night, min 10°C on Fri morning). Winds increasing (light winds from the NNW on Fri afternoon, strong winds from the NNW by Sat morning). | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 16 | SSW 16 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3900 | 4553 | 16637 | 6919 | 5046 | 2820 | 1830 | 1475 | 841 | 700 | 732 | 2187 | 3620 | 4607 | 4549 | 8434 | 6849 | 4784 | 2847 | 2176 | 1211 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross | cross | glassy | glassy | cross-off | cross-off | cross-on | cross-off | cross | cross-on | cross | cross-off | cross-off | cross-off | off | off | off |
High Tide | 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 | 2:51PM0.47m | 3:20AM0.41m | |||||||
Low Tide | 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 | 8:36AM0.07m | 9:12PM0.05m | ||||||||
 |  |  | | | | | |  |  | |  | | |  | | |  | | | | |
 | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — |
 | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | — |
Temp °C | 13 | 13 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 12 | 13 | 14 | 15 | 12 | 12 | 12 | 12 | 12 | 12 |
Feels °C | 6 | 5 | 3 | 6 | 7 | 8 | 10 | 10 | 8 | 8 | 11 | 9 | 4 | 6 | 9 | 5 | 5 | 7 | 5 | 6 | 6 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 13 |
| kJ | 1193 | 2960 | 16637 | 6919 | 5046 | 2820 | 1830 | 1475 | 841 | 700 | 732 | 2187 | 3620 | 4607 | 4549 | 8434 | 6849 | 4784 | 2847 | 2176 | 1211 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | S 13 | SSE 11 | S 10 | SW 20 | SW 20 | SE 8 | — | — | — | — | — | — | SE 12 | SE 11 | SW 17 |
| kJ | — | — | — | — | — | — | 14 | 297 | 70 | 198 | 552 | 33 | — | — | — | — | — | — | 6 | 5 | 405 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 13 | SW 24 | SSW 22 | SSE 9 | SSE 9 | SE 8 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 55 | 22 | 45 | 26 | 43 | 17 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 15 | SW 15 | SSW 17 | — | — | — | — | — | — | — | — | — | NNW 5 | NW 6 | — | SW 16 | — | — | — | — | E 4 |
| kJ | 3900 | 4553 | 8045 | — | — | — | — | — | — | — | — | — | 52 | 139 | — | 5468 | — | — | — | — | 16 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 692 | 1348 | 1120 | 198 | 126 | 126 | 0 | 0 | 0 | 42 | 42 | 44 | 204 | 164 | 316 | 153 | 198 | 0 | 0 | 0 | 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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