Surf Forecasts:
Flatrock surf forecast from 9 Jul 2026:
- Best quality surf: Monday 13 Jul, 6PM (local time) - 11ft (3.5m), 17s period, SW swell with onshore winds.
- Most powerful swell: Tuesday 14 Jul, 3AM (local time) - 18ft (5.5m), 16s period, SW swell with 15,684 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 6PM (local time) - 11ft (3.5m), 17s 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 Monday (Jul 13) at 6PM. The primary swell is predicted to be 3.5m and 17s period with a secondary swell of 4.0m and 14s. Another secondary swell of 2.4m and 18s is also forecast. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Flatrock in the next 16 days are 5.5m 16s and forecast to arrive on Tuesday (Jul 14) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 13th Jul) | 11ft (3.5m) 17s |
| Best Surf | 6PM (Mon 13th Jul) | 11ft (3.5m) 17s |
| Most Powerful | 3AM (Tue 14th Jul) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Right, you’re looking at Flatrock, a solid reef break for advanced surfers. The forecast is a bit of a mixed bag, but there’s a real standout day if you can wait for it. The water temp is about average for the time of year, nothing out of the ordinary.
The next week and a half is mostly a write-off, if I’m being honest. We’ve got a huge, powerful SW swell rolling in from the 11th of July, but it’s all blown out or messy. Friday the 10th is a no-go with 6ft SW swell and a nasty cross-on breeze. Saturday the 11th gets even uglier – 10ft to 12ft of SW swell, but it’s howling onshore, so it’s just a washing machine. Energy is high (1507 to 3529), but it’s for the kite surfers, not us.
Sunday the 12th through Monday the 13th sees the swell sticking around 10ft to 12ft, but the wind is onshore or straight on, making it junk. The energy is massive (3084 to 8728), but conditions are just poor. This swell is way too big for anyone but experts anyway, and with the wind, it’s ugly.
Tuesday the 14th of July is the first real chance. The morning shows a 16ft SW groundswell, with a very long 16-second period. The energy is insane (21135), but it’s predicted to be too big for this break. The afternoon settles down to 12ft, and you get a clean cross-shore breeze – that’s the window for experienced surfers, but it’s still a huge, powerful wave.
Wednesday the 15th and Thursday the 16th are smaller, with 8ft and 5ft swells, but the wind is light and variable, creating some cleaner conditions. The crowds at Flatrock can be a factor sometimes, but with the forecast being marginal, it might be quieter than usual. The energy is moderate (1366 to 3265).
Now, here’s the real standout. Tuesday the 21st of July. The morning brings an 12ft SSW groundswell and a light, glassy offshore breeze from the NE. The energy is pumping (3379), and the model says it’s excellent for experienced surfers. This is the one. It’s a bit of a wait, but you’ll be rewarded with clean, powerful waves at a reef that handles the direction beautifully. The rest of the second week is a mix of lumpy cross-shore winds and poor conditions, so that Tuesday morning is your golden ticket.
Keep an eye on it, but trust me, that’s the day to circle on the calendar.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Very mild (max 15°C on Fri morning, min 11°C on Sat morning). Winds increasing (light winds from the N on Thu night, near gales from the WSW by Sat morning). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Sun night. Very mild (max 15°C on Sun night, min 12°C on Wed morning). Winds decreasing (strong winds from the WSW on Mon morning, calm by Tue night). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 14 | SW 9 | SW 12 | SW 13 | SW 13 | SW 13 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2266 | 1654 | 1363 | 813 | 1507 | 3529 | 4324 | 3318 | 2892 | 5937 | 5157 | 5768 | 14869 | 13409 | 6444 | 4711 | 3265 | 2721 | 1903 | 938 | 911 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross | glassy | cross | on | cross-off | cross-off | cross-on |
High Tide | 9:46AM0.44m | 10:55AM0.51m | 11:46AM0.57m | 1:08AM0.10m | 12:29PM0.61m | 00:54AM0.11m | 1:07PM0.63m | 00:57AM0.13m | 1:39PM0.62m | 1:10AM0.18m | 2:06PM0.59m | ||||||||||
Low Tide | 11:24PM0.12m | 10:08PM0.11m | 8:36PM0.07m | 8:44PM0.05m | 9:00PM0.06m | 4:44AM0.06m | 9:13PM0.08m | 5:40AM0.03m | 9:17PM0.11m | 6:27AM0.02m | |||||||||||
 |  |  | |  | |  |  | | | |  | | | |  | | | | | | |
 | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — |
 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 |
mm | 1 | — | — | 2 | 1 | — | — | 1 | — | 2 | 2 | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 14 | 15 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 13 | 13 | 13 | 13 | 14 | 14 | 12 | 14 |
Feels °C | 10 | 10 | 8 | 7 | 1 | 4 | 5 | 7 | 9 | 8 | 7 | 8 | 8 | 8 | 9 | 12 | 11 | 12 | 11 | 7 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 14 | — | — | — | SW 22 | SW 13 | SW 16 | SW 15 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 |
| kJ | 2266 | 1654 | 1363 | 813 | — | — | — | 19 | 2892 | 5937 | 5157 | 2960 | 14869 | 13409 | 6444 | 4711 | 3265 | 2721 | 1903 | 938 | 911 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 22 | SW 20 | SSW 21 | SSW 19 | — | — | — | — | — | — | S 15 | S 13 | SSW 12 | SSW 18 |
| kJ | — | — | — | — | — | — | — | 46 | 192 | 557 | 1352 | — | — | — | — | — | — | 38 | 273 | 236 | 565 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 20 | S 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 192 | 174 |
Wind waves Height (m) Direction Period (s) | — | NW 4 | WNW 5 | WNW 6 | SW 9 | SW 12 | SW 13 | SW 13 | — | — | — | SW 15 | SW 17 | SSW 16 | — | — | — | — | — | — | — |
| kJ | — | 12 | 40 | 119 | 1507 | 3529 | 4324 | 3318 | — | — | — | 5768 | 8748 | 7726 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 151 | 221 | 294 | 884 | 1067 | 1244 | 1339 | 1470 | 884 | 1189 | 1434 | 884 | 698 | 198 | 0 | 74 | 74 | 44 | 44 | 42 |
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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