
Surf Forecasts:
Flatrock surf forecast from 12 Jul 2026:
- Best quality surf: Monday 13 Jul, 9AM (local time) - 16ft (5.0m), 16s period, SW swell with onshore winds.
- Most powerful swell: Tuesday 14 Jul, 12AM (local time) - 18ft (5.5m), 17s period, SW swell with 15,888 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 9AM (local time) - 16ft (5.0m), 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 Monday (Jul 13) at 9AM. The primary swell is predicted to be 5.0m and 16s period with a secondary swell of 1.9m and 19s. Another secondary swell of 4.0m and 16s 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 17s and forecast to arrive on Tuesday (Jul 14) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Jul 16) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 13th Jul) | 16ft (5.0m) 16s |
| Best Surf | 9AM (Mon 13th Jul) | 16ft (5.0m) 16s |
| Most Powerful | 12AM (Tue 14th Jul) | 18ft (5.5m) 17s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Alright, let’s talk Flatrock in feet and Fahrenheit over the next couple of weeks. There’s a whole lot of swell coming, but most of it is going to be way too big or too messy – we’ve only got a couple really clean windows in there.
Flatrock is a reef break that lights up on a good SW groundswell, but we’re starting Monday July 13 with a massive 16ft swell out of the SW, period 16 seconds. That’s insane – combined wave energy hits 21709 (very strong). Wind is offshore from the west at 35 km/h, but it’s just way too big for this spot unless you’re totally nuts. Tuesday July 14 morning stays oversized at 16ft, wind turns cross-on from the southwest at 20 km/h – messy and heaving.
Finally, on Wednesday July 15 morning, it drops to a much more surfable 10ft from the SW, period 15 seconds – combined energy 3281 (moderate). Wind is light NE cross-offshore at 10 km/h – clean conditions. This is the best on offer: solid groundswell, good shape, excellent for experienced surfers. Wednesday afternoon gets even better with nearly glassy wind (WSW 5 km/h) and swell down to 8ft, period 14 seconds. If you can handle the reef, this is the session.
Thursday July 16 through Friday July 17 sees swell 7ft to 8ft, same SW direction, periods 14-16 seconds – combined energy moderate (2242-3162). Winds are either cross-off or cross-on, not perfect, but still okay for a paddle if you’re keen. Saturday July 18 drops to 3-4ft but gets messy onshore – not worth it. Sunday July 19 has a weird long-period 19-second pulse but only 2ft swell, and the wind is poor.
Tuesday July 21 morning brings a cleaner setup: NNE cross-offshore wind at 30 km/h with 6ft SW swell, period 13 seconds – combined energy 1058 (weak to moderate). Clean and manageable for advanced surfers. After that, Wednesday July 22 through the end of the first week turns ugly – rain showers, strong onshore winds up to 45 km/h, swell 6ft to 8ft – complete blown-out mess.
Friday July 24 offers a solid 10ft SW swell, period 17 seconds – combined energy 6037 (strong) – but winds are cross-onshore and the surf quality is poor. Saturday July 25 and Sunday July 26 are even worse: gale-force winds and swell up to 14ft, combined energy over 11120 (very strong). That’s kite-surfing territory, not for paddle boards.
By Monday July 27, there’s cross-shore wind but still 11ft SSW swell, combined energy 5152 (strong) and lumpy. The rest of the outlook stays stormy and messy.
Water temperature is about 59°F, pretty normal for this time of year (anomaly -0.6°). Not much change there.
Bottom line: Wednesday July 15 is the day to be in the water – manageable size, clean wind, classic groundswell. Everything else is either huge, wonky, or blown out.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 15°C on Mon morning, min 13°C on Tue night). Winds decreasing (fresh winds from the W on Mon morning, calm by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat afternoon, min 12°C on Sat morning). Winds increasing (light winds from the NNE on Thu afternoon, fresh winds from the N by Sat morning). | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | SW 19 | SW 18 | SW 16 |
Wave Graph | |||||||||||||||||||||
11700 | 13565 | 15888 | 11624 | 5998 | 4250 | 3281 | 2746 | 2004 | 1761 | 3105 | 2726 | 2212 | 1460 | 899 | 562 | 437 | 320 | 384 | 1099 | 2721 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross-off | cross-off | glassy | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross |
High Tide | 12:29PM0.61m | 00:54AM0.11m | 1:07PM0.63m | 00:57AM0.13m | 1:39PM0.62m | 1:10AM0.18m | 2:06PM0.59m | 1:34AM0.23m | 2:27PM0.54m | 2:06AM0.29m | 2:42PM0.49m | 2:43AM0.33m | 2:54PM0.44m | 3:23AM0.36m | |||||||
Low Tide | 9:00PM0.06m | 4:44AM0.06m | 9:13PM0.08m | 5:40AM0.03m | 9:17PM0.11m | 6:27AM0.02m | 9:15PM0.13m | 7:10AM0.03m | 9:13PM0.13m | 7:49AM0.05m | 9:14PM0.12m | 8:26AM0.09m | 9:21PM0.09m | ||||||||
7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | |
— | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | |
mm | — | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | 15 | 15 | 16 | 15 | 13 | 16 | 15 | 14 | 17 | 17 | 15 | 18 | 18 |
Feels °C | 9 | 9 | 9 | 11 | 13 | 13 | 13 | 15 | 12 | 11 | 14 | 12 | 7 | 13 | 12 | 7 | 12 | 11 | 9 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 18 | SW 16 |
11700 | 13565 | 15888 | 11624 | 5998 | 4250 | 3281 | 2746 | 2004 | 1761 | 3105 | 2726 | 2212 | 1460 | 899 | 562 | 437 | 320 | 167 | 1099 | 2721 | |
Swell 2 Height (m) Direction Period (s) | SW 19 | — | — | — | — | — | — | — | — | SW 18 | S 12 | SSE 11 | S 11 | S 10 | SSE 10 | — | — | WNW 7 | SW 19 | SW 13 | SSW 10 |
2530 | — | — | — | — | — | — | — | — | 915 | 44 | 47 | 9 | 8 | 10 | — | — | 38 | 384 | 277 | 37 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | S 12 | — | — | — | — | ESE 10 | — | — | SSW 22 | SW 15 | S 11 | — |
— | — | — | — | — | — | — | — | — | 26 | — | — | — | — | 10 | — | — | 45 | 212 | 61 | — | |
Wind waves Height (m) Direction Period (s) | SW 16 | SW 16 | SW 17 | SW 16 | — | — | — | — | — | N 4 | NNW 4 | — | NNW 4 | WNW 6 | NW 6 | NNW 4 | WNW 6 | N 3 | NW 4 | NW 7 | — |
7479 | 7954 | 8646 | 7037 | — | — | — | — | — | 9 | 13 | — | 21 | 21 | 31 | 47 | 67 | 5 | 46 | 100 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1189 | 1387 | 884 | 884 | 153 | 0 | 0 | 0 | 74 | 44 | 42 | 74 | 44 | 42 | 42 | 44 | 78 | 44 | 204 | 42 | 44 |
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.










