
Surf Forecasts:
Flatrock surf forecast from 31 Jul 2026:
- Best quality surf: Thursday 6 Aug, 6PM (local time) - 8ft (2.4m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 3 Aug, 12AM (local time) - 13ft (4.0m), 15s period, SW swell with 7,950 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 3AM (local time) - 7ft (2.1m), 12s 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 (Aug 04) at 3AM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 0.9m and 16s. The wind is predicted to be glassy 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 Monday (Aug 03) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Wednesday (Aug 05) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 4th Aug) | 7ft (2.1m) 12s |
| Best Surf | 6PM (Thu 6th Aug) | 8ft (2.4m) 16s |
| Most Powerful | 12AM (Mon 3rd Aug) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
G’day, Rusty here, looking over the coming weeks at Flatrock. It’s a solid reef break that takes a good SW groundswell, and we’ve got a bit of a mixed bag ahead. The first few days are mostly a write-off thanks to strong onshore wind and lumpy conditions, but there are some absolute gems hidden in there for the patient crew.
We kick off with a bit of a dud. Saturday the 1st and Sunday the 2nd are blown out with strong onshore wind and big, messy swell. Wave energy is massive (2804 to 6665), but it’s all wind-affected junk. Monday the 3rd isn’t much better. Then things shift.
Tuesday the 4th morning is the first real standout. A 7ft SW groundswell with a 15-second period rolling in, combined with a light NE cross-offshore breeze. That’s clean, lined-up waves for experienced surfers. The combined energy is a solid 2117 – moderate but punchy. The water is sitting at 59°, which is pretty normal for this time of year. It’s a reef, so expect some proper shape, but it’ll be for the advanced crew only. Crowds are possible here sometimes.
After a bit of a lull with smaller, lumpy stuff on Wednesday and Thursday morning, we get another crack on Thursday the 6th morning. Glassy conditions (5ft SW, 16 seconds, 1918 energy) but that smaller size and glassy surface means clean but not epic. Not a standout, but a fun session if you’re keen.
Then Friday the 7th morning is a proper beast. A 10ft SW groundswell, 18-second period, and a NNE cross-offshore breeze. That’s an energy reading of 7335 – strong, powerful, and clean. This is for experts only, and it’s the best on offer in the near-term. The wind is moderate but cross-off, so the face should be holding up nicely. A serious session if you’ve got the skills.
We then hit another rough patch from the 8th through the 10th with strong onshore wind and blown-out conditions. Monday the 10th morning is pumping with 13ft SW and 18 seconds, but cross-shore wind makes it lumpy – more of a kite-surfing setup, honestly. Energy is 10012, so there’s heaps of power, just not for us.
After that, Tuesday the 11th afternoon is wild – 16ft SW, 14-second period, and an energy reading of 14536. That’s way too big for this break, even for experts. Definitely sit that one out.
Now for the long-range standouts. Wednesday the 13th afternoon sees a 8ft SSW swell, 21-second period (very long groundswell), with a SSE cross-offshore breeze. That’s clean, and at 6670 energy it’s got serious grunt. The long period means it’ll wrap well around the reef, so expect proper barrels. Less certain this far out, but promising.
Thursday the 14th morning is the pick of the second week. A 12ft SSW swell, 16-second period, and a light ENE offshore breeze. Clean as a whistle, energy at 6569. This is for expert surfers only, but if it holds, this will be the day to circle. Afternoon stays good too with 10ft SW and clean cross-off.
Saturday the 15th and Sunday the 16th both offer lovely clean conditions with 7-8ft SW swells, light offshore or glassy wind. Energy is between 2418 and 3329. Fun, manageable waves for experienced surfers, and the water stays average temp. A nice way to round out the outlook.
Overall, the best windows are Friday the 7th morning and Thursday the 14th morning. Mark those dates.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Very mild (max 14°C on Sat afternoon, min 10°C on Sat morning). Winds decreasing (strong winds from the N on Sat night, calm by Mon night). | Days 4-6 Weather SummarySome drizzle, heaviest during Wed afternoon. Very mild (max 15°C on Wed night, min 11°C on Tue morning). Winds decreasing (fresh winds from the NNW on Wed morning, calm by Thu morning). | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 17 | SW 17 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 15 | SW 15 | SSW 14 | SW 19 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 | SW 18 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||||
2778 | 3442 | 2727 | 3603 | 3286 | 7950 | 3619 | 2722 | 1762 | 1833 | 1396 | 796 | 837 | 1818 | 1256 | 1170 | 2781 | 3664 | 5368 | 3805 | 1852 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | on | on | cross-on | cross-on | cross-on | cross | cross-off | on | cross-off | cross | cross | cross-on | glassy | cross | off | cross-off | cross | cross |
High Tide | 2:12PM0.56m | 2:18AM0.36m | 2:33PM0.52m | 2:48AM0.39m | 2:51PM0.47m | 3:20AM0.41m | 3:05PM0.41m | 3:56AM0.42m | 3:05PM0.34m | 4:40AM0.42m | 2:26PM0.30m | 5:50AM0.40m | |||||||||
Low Tide | 8:45PM0.06m | 8:01AM0.04m | 8:59PM0.05m | 8:36AM0.07m | 9:12PM0.05m | 9:11AM0.11m | 9:24PM0.05m | 9:50AM0.18m | 9:31PM0.05m | 10:37AM0.25m | 9:30PM0.05m | 9:16PM0.04m | |||||||||
7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | |
— | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | 2 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 17 |
Temp °C | 12 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 12 | 11 | 12 | 12 | 15 | 15 | 14 | 13 | 14 | 18 | 18 |
Feels °C | 4 | 7 | 7 | 5 | 5 | 6 | 7 | 8 | 8 | 8 | 10 | 6 | 5 | 6 | 12 | 14 | 12 | 11 | 8 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 15 | SW 15 | SSW 14 | SSW 15 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 | SW 18 | SW 17 | SW 16 |
2778 | 3442 | 2727 | 3062 | 2597 | 7950 | 3619 | 2722 | 1762 | 1833 | 1396 | 796 | 720 | 1818 | 1256 | 1170 | 2781 | 3664 | 5368 | 3805 | 1852 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 20 | SW 18 | SW 17 | S 11 | SW 22 | SSW 20 | SW 19 | S 8 | NW 6 | SW 19 | — | — | SW 14 | — | — |
— | — | — | — | — | — | 97 | 327 | 434 | 284 | 119 | 698 | 837 | 46 | 19 | 708 | — | — | 1950 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 17 | — | SW 22 | S 9 | S 8 | S 8 | S 8 | SSE 7 | — | — | SE 8 | — | — |
— | — | — | — | — | — | — | — | 505 | — | 165 | 171 | 69 | 46 | 10 | 11 | — | — | 17 | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NW 6 | NW 7 | SW 15 | SW 15 | SW 16 | — | — | — | — | — | NE 3 | N 4 | NW 5 | NW 6 | NW 5 | — | SE 9 | — | NNW 5 | NNW 5 |
26 | 75 | 143 | 3603 | 3286 | 5273 | — | — | — | — | — | 5 | 14 | 20 | 47 | 29 | — | 37 | — | 44 | 82 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 151 | 204 | 799 | 321 | 692 | 361 | 871 | 126 | 0 | 42 | 74 | 44 | 44 | 42 | 0 | 153 | 0 | 154 | 204 | 318 |
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.











