Surf Forecasts:
The Island surf forecast from 23 Aug 2026:
- Best quality surf: Saturday 29 Aug, 12PM (local time) - 6ft (1.8m), 13s period, SW swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 12PM (local time) - 8ft (2.4m), 16s period, SW swell with 2,692 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 9PM (local time) - 5ft (1.5m), 14s period with SW swell.
Best Forecast Surf Conditions for The Island this week:
The surf forecast for The Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 9PM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.1m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Island in the next 16 days are 2.4m 16s and forecast to arrive on Friday (Aug 28) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Aug 30) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 25th Aug) | 5ft (1.5m) 14s |
| Best Surf | 12PM (Sat 29th Aug) | 6ft (1.8m) 13s |
| Most Powerful | 12PM (Fri 28th Aug) | 8ft (2.4m) 16s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the cards for The Island.
Right off the bat, we’ve got a tricky run of weather and swell. The first few days are a bit of a write-off, with onshore winds and messy conditions. Don't bother paddling out on Monday the 24th or Tuesday the 25th; the wind is all wrong, and the swell is lumpy and poor. The Island likes it clean, and it’s just not getting it.
We see a slight improvement on Wednesday morning the 26th. A chest-high 4ft SW swell rolling in with a 13-second period, and a decent cross-offshore breeze from the NNE. It’s a reef break, so that long period is a good thing, but the energy is only moderate (492). It’s a marginal call, but the cleanest window in a messy start.
The real standout, and the one I’ve got my eye on, is way out on Saturday the 5th of September. This is the one. We’re looking at a solid 7ft SW swell hitting Saturday afternoon, with a long 16-second period. The combined energy is strong (2103), and the wind is a perfect, glassy cross-offshore from the NNE. The report says it’s excellent for experienced surfers, and that’s no joke. For a reef break like The Island, this is a proper session. That’s the pick of the fortnight. The morning of that day is also good, with a slightly smaller 5ft swell and clean conditions.
Leading up to that, there are a few other windows. Monday the 31st of August has a clean 6ft SW swell, but the wind is a bit stronger. Tuesday the 1st of September morning is looking clean with a light breeze and a 4ft SW swell, but it’s a smaller day. The Thursday the 27th of August has a clean morning, but the wind is howling at 25 mph, so it’s a no-go.
The second week keeps things interesting. After the standout on the 5th, Sunday the 6th of September morning has a 8ft SW swell, but the wind is sidling across, and the afternoon gets blown out. Monday the 7th of September afternoon sees a massive 10ft WSW swell with a huge energy reading (7320) – that’s expert territory only, and the wind is cross-shore, making it lumpy. Tuesday the 8th of September morning has an 8ft SW swell, but the wind is onshore again.
So, to sum it up: the first week is a struggle for clean waves. The second week looks much more promising. The absolute standout is Saturday the 5th of September afternoon. That's the one you clear your calendar for. The water temp is about average for this time of year.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Mon morning. Very mild (max 17°C on Wed afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Wed afternoon). | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Thu night. Warm (max 23°C on Thu afternoon, min 11°C on Sat morning). Winds increasing (light winds from the ENE on Wed night, strong winds from the N by Thu morning). | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 14 | SW 14 | SW 13 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 14 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 10 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 767 | 387 | 612 | 1144 | 1880 | 1273 | 813 | 488 | 363 | 355 | 447 | 949 | 2375 | 2594 | 2562 | 2085 | 2371 | 416 | 202 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross-on | cross-on | cross-on | off | cross-off | cross-on | cross-off | cross-off | cross | cross | cross-on | on | on | cross-off | cross-off | cross-off |
High Tide | 4:23AM0.00m | 10:24AM0.00m | 12:18PM0.00m | 1:57PM0.00m | |||||||||||||||
Low Tide | 5:13PM-0.00m | 7:08PM-0.00m | 9:19PM-0.00m | 1:09AM-0.00m | 2:44AM-0.00m | ||||||||||||||
 |  | |  |  |  |  | | | | | |  | | | | | | | |
 | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — |
 | 6:08 | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — |
mm | 7 | 11 | 1 | — | — | — | — | — | — | — | — | — | 4 | — | — | 2 | 2 | — | — |
Temp °C | 16 | 14 | 14 | 14 | 14 | 13 | 12 | 13 | 17 | 17 | 19 | 23 | 20 | 14 | 14 | 13 | 11 | 15 | 14 |
Feels °C | 12 | 10 | 7 | 7 | 8 | 9 | 10 | 9 | 15 | 13 | 11 | 17 | 13 | 9 | 9 | 7 | 5 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | — | — | — | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 14 | SW 19 | SW 17 | — | S 16 | — | SW 14 | SW 10 | SSW 9 |
| kJ | 767 | 387 | — | — | — | 1273 | 813 | 488 | 363 | 355 | 447 | 949 | 2375 | — | 5 | — | 2371 | 416 | 202 |
Swell 2 Height (m) Direction Period (s) | S 16 | NNE 3 | — | — | — | S 14 | S 14 | S 14 | SW 16 | SW 23 | SW 21 | SW 15 | — | — | — | — | SW 14 | SW 13 | SW 13 |
| kJ | 5 | 4 | — | — | — | 4 | 4 | 4 | 42 | 21 | 348 | 558 | — | — | — | — | 331 | 277 | 193 |
Swell 3 Height (m) Direction Period (s) | — | SW 20 | — | — | — | — | — | — | S 12 | S 16 | — | — | — | — | — | — | S 14 | SW 19 | SW 21 |
| kJ | — | 15 | — | — | — | — | — | — | 3 | 5 | — | — | — | — | — | — | 4 | 15 | 71 |
Wind waves Height (m) Direction Period (s) | — | ENE 4 | SW 14 | SW 13 | SW 16 | — | — | — | — | NE 3 | N 4 | NNW 4 | — | SW 16 | SW 16 | SW 14 | SW 14 | — | ESE 4 |
| kJ | — | 1 | 612 | 1144 | 1880 | — | — | — | — | 2 | 48 | 17 | — | 2594 | 2562 | 2085 | 1493 | — | 21 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 148 | 249 | 337 | 897 | 398 | 0 | 24 | 24 | 13 | 412 | 249 | 412 | 412 | 337 | 346 | 51 | 337 | 683 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the The Island Surf forecast
The above surf forecast table for The Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Island can be found by selecting the local surf guide option on the grey menu. Our The Island 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 (The Island) 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 The Island 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 The Island, camping, hotels and holiday cottages in Eyre Peninsula, consider staying in Thevenard which is 111 km (69 miles) away.
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