Surf Forecasts:
Flatrock surf forecast from 11 Jul 2026:
- Best quality surf: Monday 13 Jul, 3AM (local time) - 18ft (5.5m), 16s period, SW swell with onshore winds.
- Most powerful swell: Monday 13 Jul, 9PM (local time) - 18ft (5.5m), 17s period, SW swell with 16,197 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 3AM (local time) - 18ft (5.5m), 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 3AM. The primary swell is predicted to be 5.5m and 16s period with a secondary swell of 4.0m and 16s. 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 Monday (Jul 13) at 9PM. 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 Saturday (Jul 18) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 13th Jul) | 18ft (5.5m) 16s |
| Best Surf | 3AM (Mon 13th Jul) | 18ft (5.5m) 16s |
| Most Powerful | 9PM (Mon 13th Jul) | 18ft (5.5m) 17s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Alright crew, Rusty here. We’ve got a heap of energy on the charts for Flatrock over the next 16 days, but the wind is going to be the main character in this story.
The main event is a big South-West groundswell hitting on July 13th. That Monday morning is the standout, with a solid 16ft swell from the SW, a very long period of 16 seconds, and wave energy off the charts at 22058. This is a serious, powerful ocean. The wind is onshore, but it’s considered a go. This is expert-only territory. The afternoon drops back to 13ft, still heavy with onshore wind.
Tuesday the 14th holds a 16ft swell in the morning, long period and very high energy at 18750. Still advanced. By afternoon it eases to 12ft, but gets choppier.
Now, Wednesday the 15th is your golden window. A morning cross-offshore breeze from the ENE at just 3 mph, and the swell drops to 8ft. Then the afternoon is glassy, with a 8ft SW swell at 15 seconds. Wave energy is 2328. This is clean, lined-up perfection for experienced surfers. This is the one to circle.
Thursday the 16th through Sunday the 19th has smaller, cleaner windows, but they’re marginal. You’ll see 7ft to 7ft surf with decent periods. The afternoons get a cross-onshore chop.
There’s a real flat patch from Saturday the 18th, with tiny 4ft to 6ft surf and strong, messy cross-shore winds. Not worth your time.
Then another pulse on Monday the 20th of July. Swell jumps to 12ft from the WSW with a 15 second period. Wave energy is 9695. The afternoon is cleaner with a gentle cross-onshore. A promising long-range call.
Tuesday the 21st of July looks good again: 7ft SW swell with a clean cross-offshore wind. Good conditions for experienced surfers.
The final week from the 22nd onward is a write-off. Strong winds, onshore flow, and rain. The 24th and 25th have big swell (10ft to 12ft) but with near gale-force winds. Completely blown out. The 27th ends with a near gale cross-shore.
The water temperature is 59°F, which is about normal for this time of year.
The bottom line: Your top picks are the glassy afternoon of Wednesday the 15th of July, and the cleaner session on Tuesday the 21st of July. The 13th and 14th are for the big dog experts only.
Rusty, signing out.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Very mild (max 15°C on Sun morning, min 14°C on Sun morning). Winds decreasing (fresh winds from the WSW on Sun morning, light winds from the E by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Thu afternoon, min 13°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
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 12 | SW 13 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 21 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3278 | 3765 | 7353 | 12049 | 7954 | 15888 | 11624 | 5998 | 4141 | 2746 | 2328 | 1862 | 1604 | 3538 | 2881 | 2285 | 1526 | 849 | 503 | 386 | 548 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross | cross-off | glassy | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross | cross | cross |
High Tide | 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 | 1:34AM0.23m | 2:27PM0.54m | 2:06AM0.29m | 2:42PM0.49m | 2:43AM0.33m | |||||||
Low Tide | 8:44PM0.05m | 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 | |||||||||
 | |  |  | |  |  |  |  | | | | | | | | | | | | | |
 | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — |
 | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — |
mm | — | — | — | — | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | 15 | 15 | 16 | 15 | 13 | 15 | 15 | 14 | 18 | 17 |
Feels °C | 7 | 8 | 9 | 9 | 8 | 10 | 11 | 12 | 12 | 14 | 15 | 13 | 12 | 15 | 12 | 8 | 11 | 11 | 7 | 14 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 22 | SW 20 | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 46 | 186 | 7353 | 12049 | 7954 | 15888 | 11624 | 5998 | 4141 | 2746 | 2328 | 1862 | 1604 | 3538 | 2881 | 2285 | 1526 | 849 | 503 | 386 | 273 |
Swell 2 Height (m) Direction Period (s) | — | SSW 20 | — | SW 19 | — | — | — | — | — | — | — | SSW 21 | SSW 18 | S 12 | S 11 | SSE 11 | SSE 11 | SE 10 | — | SSW 24 | WNW 8 |
| kJ | — | 256 | — | 2530 | — | — | — | — | — | — | — | 45 | 597 | 11 | 62 | 22 | 11 | 4 | — | 55 | 75 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 22 | S 12 | — | — | — | — | — | S 26 | — | SW 21 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 73 | 148 | — | — | — | — | — | 13 | — | 548 |
Wind waves Height (m) Direction Period (s) | SW 12 | SW 13 | — | SW 16 | — | SW 17 | SW 16 | — | — | — | — | — | — | — | — | — | — | NNW 6 | NNW 4 | NW 6 | N 4 |
| kJ | 3278 | 3765 | — | 7479 | — | 8646 | 7126 | — | — | — | — | — | — | — | — | — | — | 12 | 34 | 75 | 35 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1339 | 1419 | 884 | 1189 | 1411 | 884 | 198 | 153 | 74 | 0 | 0 | 0 | 44 | 42 | 0 | 44 | 42 | 44 | 44 | 44 | 204 |
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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