Surf Forecasts:
Flatrock surf forecast from 9 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, 3AM (local time) - 18ft (5.5m), 17s period, SW swell with 16,089 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 6AM (local time) - 15ft (4.5m), 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 Monday (Jul 13) at 6AM. The primary swell is predicted to be 4.5m and 15s period with a secondary swell of 0.7m and 20s. Another secondary swell of 3.5m 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 3AM. 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 (Mon 13th Jul) | 15ft (4.5m) 15s |
| Best Surf | 6AM (Mon 13th Jul) | 15ft (4.5m) 15s |
| Most Powerful | 3AM (Tue 14th Jul) | 18ft (5.5m) 17s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
Alright, Rusty here. We are looking solely at Flatrock. Let’s get into it.
The 16-day window kicks off with some pulse in the water, but the winds are all over the shop. We’ve got a huge, powerful swell train arriving, but a lot of it is going to be blown to bits with strong, onshore winds. The water temp is sitting at 59°F, which is about 1°F cooler than the long term average, so nothing too unusual for this time of year.
Thursday morning the 9th of July is actually your best bet early on. We’ve got a solid 6ft SW groundswell pumping in with a very long 15 second period. More importantly, the wind is a light cross-offshore breeze from the NNE. That keeps it clean. The combined swell energy is strong at 1780, so there’s plenty of push behind it. This is a good one for experienced surfers.
After that, it goes pretty ugly. Thursday afternoon gets a cross-on breeze and things get choppy. Friday the 10th is a write-off with stronger, cross-shore winds and lumpy conditions. The weekend is a complete mess – Saturday the 11th through Monday the 13th has big, powerful SW swells between 10ft and 15ft, but it's all being obliterated by fresh to strong onshore winds. With energy readings getting up into the thousands and even ten thousand plus on Sunday morning (10737), it’s going to be a washing machine. Not for paddling.
There’s a bit of a lull, but the standout of the whole period is definitely Wednesday the 15th of July. The morning is looking top shelf. We get a solid 10ft SW groundswell with that same long 15 second period, but the wind flips around to a light offshore from the ENE. That means clean faces and proper shape. The energy is still massive at 3804, but that offshore breeze will keep it from turning into a complete closeout. This is expert territory for sure, given the size. The afternoon holds too, with an 8ft swell and moderate offshore breeze (2934 energy), still clean.
Thursday the 16th and Friday the 17th offer some smaller, clean-ish windows with cross-offshore winds and 5-6ft SW swell, but those are more marginal for good shape. The second week fades fast. From Saturday the 18th onwards, it’s mostly onshore wind again with messy, lumpy conditions. There’s a pulse of energy on Monday and Tuesday the 20th-21st, but it’s all cross-onshore and not worth timing a session around. We’re in for flat and choppy by Wednesday the 22nd of July.
Don’t bother with a board before Thursday morning the 9th. If you’re an experienced surfer, get on Wednesday the 15th before the wind clocks around again. Otherwise, it’s a waiting game for a clean day.
- Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Fri night. Very mild (max 15°C on Thu afternoon, min 13°C on Thu morning). Winds increasing (light winds from the NNW on Thu afternoon, strong winds from the WSW by Sat morning). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun morning. Very mild (max 16°C on Sun night, min 12°C on Tue night). Winds decreasing (strong winds from the W on Sun night, light winds from the E by Tue night). | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
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 15 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | SW 9 | SW 12 | SW 13 | SW 13 | SW 13 | SW 17 | SW 15 | SW 14 | SSW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1325 | 2684 | 2266 | 1654 | 1363 | 813 | 1660 | 3224 | 4169 | 6679 | 3234 | 6874 | 5072 | 7079 | 8597 | 13920 | 6901 | 5268 | 3804 | 2938 | 2004 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross | cross-on | cross-on | on | cross-on | on | cross-on | on | on | on | on | cross-on | on | cross-on | cross-off | off | off | cross-off |
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 | |||||||||||
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 | ||||||||||||
 | |  |  |  | | |  |  | | | | |  | | | |  | | |  | |
 | 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 | — | — | 2 | 1 | 1 | 2 | 2 | — | — | 1 | — | 1 | 2 | — | 2 | — | 1 | — | — | — | — |
Temp °C | 14 | 15 | 15 | 14 | 15 | 15 | 13 | 13 | 14 | 15 | 15 | 16 | 15 | 15 | 14 | 15 | 15 | 14 | 12 | 12 | 11 |
Feels °C | 10 | 13 | 12 | 9 | 9 | 9 | 4 | 3 | 7 | 9 | 8 | 10 | 8 | 8 | 8 | 10 | 10 | 10 | 9 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | — | — | — | SW 13 | SW 13 | SW 17 | SSW 19 | SW 14 | SSW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 |
| kJ | 1325 | 2684 | 2266 | 1654 | 1363 | 813 | — | — | — | 6679 | 3234 | 6874 | 1216 | 7079 | 8597 | 13920 | 6901 | 5268 | 3804 | 2938 | 2004 |
Swell 2 Height (m) Direction Period (s) | SW 20 | — | — | — | — | — | — | — | — | — | SW 19 | SSW 21 | SW 20 | SW 19 | — | — | — | — | — | — | S 14 |
| kJ | 455 | — | — | — | — | — | — | — | — | — | 96 | 557 | 1111 | 882 | — | — | — | — | — | — | 183 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 22 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 308 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 5 | WNW 5 | WNW 6 | SW 9 | SW 12 | SW 13 | SW 13 | — | — | SW 15 | SW 14 | — | SSW 17 | — | — | — | — | — |
| kJ | — | — | — | 31 | 67 | 137 | 1660 | 3224 | 4169 | 4058 | — | — | 5072 | 5001 | — | 8011 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 42 | 44 | 44 | 151 | 221 | 884 | 1195 | 1339 | 1348 | 1348 | 316 | 1189 | 1419 | 901 | 317 | 198 | 126 | 0 | 0 | 74 |
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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