
Surf Forecasts:
Flatrock surf forecast from 6 Aug 2026:
- Best quality surf: Monday 10 Aug, 3AM (local time) - 18ft (5.5m), 17s period, WSW swell with cross-onshore winds.
- Most powerful swell: Monday 10 Aug, 3AM (local time) - 18ft (5.5m), 17s period, WSW swell with 18,175 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9PM (local time) - 10ft (3.0m), 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 Thursday (Aug 06) at 9PM. The primary swell is predicted to be 3.0m and 16s period with a secondary swell of 0.4m and 8s. 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 5.5m 17s and forecast to arrive on Monday (Aug 10) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Tuesday (Aug 11) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 6th Aug) | 10ft (3.0m) 16s |
| Best Surf | 3AM (Mon 10th Aug) | 18ft (5.5m) 17s |
| Most Powerful | 3AM (Mon 10th Aug) | 18ft (5.5m) 17s |
Table - best surf conditions forecast for Flatrock over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya from the hilly shores. Let's get into it.
We've got a solid run of south-west groundswell on the radar for Flatrock, but it's a classic case of "don't let the size fool ya." The early part of the outlook is a no-go for any decent paddle surfing, with the first solid days of swell being completely blown out by strong winds. There's a frustrating gap of about a week before things start to clean up. The water temp is sitting right on 59°, which is dead average for this time of year, so no surprises there.
The first real chance to get wet doesn't come until Saturday the 15th. That morning, we finally see a clean window with light, cross-off winds from the southeast. The swell is a solid 10ft from the SW, with a long period of 16 seconds. That's a heavy groundswell, so it's going to be packing some serious punch (combined energy of 4004). This is a setup for experienced surfers only. The waves will be big, powerful, and likely breaking a bit too straight for a beach break, but on a reef like Flatrock, that long period energy will find the lines. Expect crowds to be possible.
Sunday the 16th keeps the good vibes with clean conditions and light cross-off winds. The swell drops a touch to 7ft but still holds a solid 15-second period from the SW. It's a notch down in size, making it a touch more manageable for strong intermediates, but the power is still there. The energy is still strong (2235). This will be a fantastic day for the crew that can handle it.
Monday the 17th, the swell drops to 5ft with a 14-second period. The energy drops to 944, which is moderate. The wind is clean and cross-off again in the morning, so it'll be a fun, smaller day for the longboarders or a fish.
Then, look out for Tuesday the 18th. The morning swell is small at 4ft, but the period jumps to a very long 19 seconds. That's a pure, deep-ocean groundswell. The wind is light and cross-off. It'll be clean, but with that period, it might be a bit too straight and walled on a beach, but on a reef, it could be a work of art. Then the afternoon glassed off completely with a 6ft, 18-second SW swell. That afternoon session is a real standout in the forecast. The glassy conditions with that long-period groundswell will be a surfer's dream. This is the best quality on offer, but it's a long way out, so keep a finger on the wind.
After that, things get a bit messy again with the wind picking up for the final days of the outlook. The 19th onwards sees funky cross-shore winds and lumpy conditions, so it's back to waiting for the next window.
So, to sum it up: the first week is a write-off for surfing. The standouts are the Saturday the 15th for the big, clean, powerful swell, and the Tuesday the 18th afternoon for the glassy, long-period perfection. Get out there if you can.
- Rusty
Short Range ForecastModerate rain (total 17mm), heaviest on Sat night. Very mild (max 17°C on Fri afternoon, min 11°C on Sat night). Winds increasing (light winds from the SW on Thu afternoon, near gales from the WSW by Sun morning). | Days 5-7 Weather SummaryModerate rain (total 18mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 11°C on Tue night). Winds increasing (moderate winds from the WNW on Sun night, near gales from the W by Tue night). | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 14 | SW 18 | SW 17 | SW 16 | SW 15 | WSW 14 | SW 14 | SW 17 | SW 19 | SW 18 | SW 17 |
Wave Graph | ||||||||||||||||||||
2612 | 3905 | 3678 | 3404 | 2496 | 2768 | 2416 | 2265 | 5134 | 6942 | 9741 | 8675 | 6797 | 4357 | 3151 | 1785 | 12280 | 11907 | 17753 | 8642 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | cross | cross | on | cross-on | on | cross-on | cross-on |
High Tide | 5:50AM0.40m | 10:26AM0.43m | 11:28AM0.50m | 12:06PM0.56m | 1:39AM0.14m | 12:38PM0.60m | 1:07AM0.18m | 1:05PM0.60m | 1:06AM0.23m | |||||||||||
Low Tide | 9:30PM0.05m | 9:16PM0.04m | 8:51PM0.03m | 8:33PM0.03m | 8:25PM0.03m | 4:35AM0.12m | 8:22PM0.05m | 5:35AM0.07m | 8:19PM0.08m | |||||||||||
— | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | |
5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | |
mm | — | — | — | 2 | 2 | 2 | 1 | 8 | 2 | 3 | — | 1 | — | 3 | — | 8 | 2 | 1 | — | — |
Temp °C | 14 | 13 | 15 | 17 | 14 | 16 | 16 | 15 | 12 | 12 | 13 | 14 | 15 | 14 | 15 | 12 | 13 | 13 | 13 | 13 |
Feels °C | 12 | 10 | 8 | 12 | 9 | 10 | 11 | 12 | 0 | 1 | 2 | 9 | 10 | 8 | 5 | 2 | 2 | 2 | 2 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | — | — | — | SW 17 | SW 16 | SW 15 | WSW 14 | SW 14 | SW 17 | — | SW 18 | — |
2612 | 3905 | 3678 | 3404 | 2496 | 2768 | 2416 | 2265 | — | — | — | 8675 | 6797 | 4357 | 3151 | 1785 | 12280 | — | 17753 | — | |
Swell 2 Height (m) Direction Period (s) | W 5 | SE 8 | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
21 | 24 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | S 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
33 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | N 4 | NW 5 | NNW 6 | NW 5 | — | W 6 | SW 16 | SW 14 | SW 18 | — | — | — | NNW 6 | WNW 8 | SW 17 | SW 19 | SW 18 | SW 17 |
— | — | 22 | 36 | 63 | 23 | — | 110 | 5134 | 6942 | 9741 | — | — | — | 290 | 422 | 8412 | 11907 | 10349 | 8642 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 44 | 74 | 44 | 204 | 204 | 164 | 294 | 204 | 315 | 614 | 884 | 162 | 162 | 316 | 799 | 822 | 692 | 884 | 1189 | 1121 |
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.











