Surf Forecasts:
Flatrock surf forecast from 8 Jul 2026:
- Best quality surf: Monday 13 Jul, 6AM (local time) - 15ft (4.5m), 15s period, SW swell with onshore winds.
- Most powerful swell: Tuesday 14 Jul, 9AM (local time) - 16ft (5.0m), 17s period, SW swell with 15,260 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 6AM (local time) - 6ft (1.8m), 15s 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 Thursday (Jul 09) at 6AM. The primary swell is predicted to be 1.8m and 15s period with a secondary swell of 0.4m and 20s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Flatrock in the next 16 days are 5.0m 17s and forecast to arrive on Tuesday (Jul 14) at 9AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 9th Jul) | 6ft (1.8m) 15s |
| Best Surf | 6AM (Mon 13th Jul) | 15ft (4.5m) 15s |
| Most Powerful | 9AM (Tue 14th Jul) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Alright, let’s get into it. This is Rusty, checking in from the west coast, and boy, we’ve got a real mixed bag coming our way. The first few days are a write-off for clean, manageable surf, but there’s a solid window of quality on the horizon if you’re patient.
The onshore wind machine is cranking from the 9th through the 13th. We’ve got a strong, building SW swell, but it’s getting hammered by straight-on and cross-onshore winds that are going to make a mess of things. The swell energy is massive, hitting from 1780 up to a whopping 24135 (combined energy), but the conditions are just too rough to enjoy. A 10 ft to 16 ft SW groundswell with a 13 to 17-second period is on the cards, but it’s being blown out by 25 to 28 mph winds. For the experienced crew, it’s just too dangerous and messy; for anyone else, give it a miss. The water temp is about average for this time of year, so no drama there.
Then we get a taste of something good. On Thursday morning, July 15th, Flatrock (reef) finally lights up. It’s a 10 ft SW groundswell with a long 15-second period, and we get an offshore breeze from the ENE at just 9 mph. That’s clean. The combined energy is a solid 3816, showing there’s real power, but it’s not too out of control. This is your standout for experienced surfers only—at 10 ft, it’s heavy and unforgiving. The crowd factor here is "sometimes," so you might have a few out, but it’s worth the paddle.
That quality holds through the next few days. Thursday afternoon, Friday morning (July 16th and 17th) are also in the sweet spot: clean conditions, light offshore or cross-offshore winds, and a consistent 5 ft to 7 ft SW swell with a 14 to 15-second period. The energy stays moderate to strong, between 1342 and 1796. This is much more user-friendly, but still only for experienced surfers given the reef setup and the long-period groundswell that can suck and hit hard.
After that, from Saturday, July 18th onward, the wheels come off again. We see a return of strong winds, messy conditions, and for the 23rd, a massive 20 ft SW groundswell (27670 energy) that is simply too big and dangerous, even if it’s glassy. The 24th offers a small chance at a 10 ft SSW swell with light wind, but it’s a gamble.
Overall, don't waste your time until the 15th. Then, get on it if you’re solid. The 15th morning is the pick of the entire 16-day window.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri afternoon. Very mild (max 15°C on Wed night, min 13°C on Sat afternoon). Winds increasing (light winds from the NNE on Wed night, strong winds from the WSW by Sat morning). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Very mild (max 15°C on Sun morning, min 13°C on Sat night). Winds decreasing (strong winds from the W on Sun night, moderate winds from the WSW by Tue afternoon). | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||
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 17 | SW 16 | SW 15 | SW 15 | SW 14 | WSW 9 | SW 11 | SW 12 | SW 13 | SW 13 | SW 14 | SW 15 | SW 14 | SSW 17 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2214 | 1325 | 2845 | 2266 | 1654 | 1363 | 813 | 1430 | 2816 | 3536 | 7329 | 3701 | 4334 | 5624 | 3519 | 7532 | 15260 | 7004 | 4960 | 3816 | 2784 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on | on | on | cross-on | cross-off | off | cross |
High Tide | 7:51AM0.37m | 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 | |||||||||||
Low Tide | 11:18PM0.12m | 11:24PM0.12m | 10:08PM0.11m | 8:36PM0.07m | 8:44PM0.05m | 9:00PM0.06m | 4:44AM0.06m | 9:13PM0.08m | 5:40AM0.03m | ||||||||||||
 |  |  | |  |  |  | | | | |  | | | | | | |  | | | |
 | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — |
 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 |
mm | — | — | — | — | — | 1 | 1 | 2 | — | 1 | — | 1 | 2 | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 13 | 14 |
Feels °C | 11 | 11 | 12 | 12 | 10 | 9 | 9 | 5 | 3 | 7 | 9 | 9 | 8 | 8 | 10 | 9 | 11 | 11 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | — | — | — | SW 13 | SW 19 | SW 14 | SW 19 | SSW 18 | SSW 17 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 15 |
| kJ | 2214 | 1325 | 2845 | 2266 | 1654 | 1363 | 813 | — | — | — | 7329 | 59 | 4334 | 1198 | 1044 | 7532 | 15260 | 7004 | 4960 | 3816 | 2784 |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | — | — | — | — | — | — | — | — | — | SW 20 | SW 18 | — | SW 18 | — | — | — | — | — | — |
| kJ | — | 455 | — | — | — | — | — | — | — | — | — | 190 | 719 | — | 1465 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SSW 21 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 557 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WNW 5 | WNW 5 | WNW 6 | WSW 9 | SW 11 | SW 12 | SW 14 | SW 13 | — | SW 15 | SW 14 | — | SSW 17 | — | — | — | — |
| kJ | — | — | — | — | 54 | 61 | 131 | 1430 | 2816 | 3536 | 4574 | 3701 | — | 5624 | 3519 | — | 8875 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 42 | 44 | 151 | 164 | 221 | 1189 | 1195 | 1244 | 1348 | 1411 | 881 | 1341 | 1386 | 321 | 1120 | 1189 | 74 | 0 | 126 |
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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