Surf Forecasts:
The Island surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 6AM (local time) - 6ft (1.8m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 3AM (local time) - 8ft (2.5m), 17s period, SW swell with 3,819 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 6AM (local time) - 6ft (1.8m), 16s 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 Saturday (Aug 22) at 6AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.2m and 24s. 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 2.5m 17s and forecast to arrive on Friday (Aug 28) 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 1.0m 4s period and expected on Monday (Aug 24) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 22nd Aug) | 6ft (1.8m) 16s |
| Best Surf | 6AM (Sat 22nd Aug) | 6ft (1.8m) 16s |
| Most Powerful | 3AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's shaping up for The Island over the next couple of weeks.
The pattern is a bit of a slow burn. We've got some solid swell energy coming through, but the wind is gonna play games with us for the first few days. The real standout window opens up at the end of August and into the start of September.
Water temp here is sitting at 59° right now, which is pretty much dead average for this time of year, so no surprises there. The first few days are a write-off with that cross-onshore junk, but by Saturday morning the 22nd, things clean right up. That morning, we’ve got a solid 6 ft SW groundswell with a long 15-second period, and the wind swings around to a light cross-offshore from the NE. That's the kind of combo that makes this reef setup start talking. The combined energy is strong at 1612, and the conditions will be clean. This is the first real highlight.
We then get a messy few days. Sunday the 23rd has a bit more size at 6 ft but the wind is stronger, and by Monday the 24th a fresh breeze ruins it completely, dropping the swell right down. Tuesday the 25th sees a big jump in size to 8 ft with energy hitting 3363, but it's all cross-on and lumpy – not ideal.
We have a long gap of poor to marginal conditions really until the following week. There’s a small window on Friday the 28th with a clean 6 ft SW swell and a cross-off wind, but it’s moderate breeze and only a 3/10 quality look from here.
The real standout of the whole run is Monday the 31st of August. We get a fantastic 4 ft SW groundswell with a very long 19-second period, and the wind is a light cross-offshore from the NE. The energy is strong at 1606, and conditions are predicted to be clean and excellent for those who know this wave. The long period means this reef will really groove, with long walls and easy paddle-outs between sets.
Following that, Tuesday the 1st of September also looks promising with another clean morning, 5 ft SW swell from a 16-second period, and a light cross-offshore breeze. Energy is moderate at 1372. The wind and period look good, but it’s slightly smaller than the Monday.
After that, the wind goes sour again through the rest of the first week of September, with strong breezes making the 7 ft+ swell a messy proposition. The best bet is to mark your calendar for the Monday the 31st of August and the Tuesday the 1st of September.
Rusty out.
Short Range ForecastHeavy rain (total 20mm), heaviest during Mon morning. Warm (max 20°C on Sun afternoon, min 13°C on Fri afternoon). Winds increasing (calm on Sat morning, fresh winds from the NNE by Mon morning). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Mon afternoon. Very mild (max 19°C on Thu morning, min 11°C on Tue night). Winds decreasing (strong winds from the SSW on Mon night, calm by Tue night). | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 21 | SW 19 | SW 17 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1771 | 1643 | 1520 | 1212 | 1108 | 1643 | 1082 | 614 | 393 | 317 | 1541 | 2620 | 1712 | 825 | 488 | 369 | 472 | 959 | 3208 | 2494 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | off | cross | off | cross-off | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-on | cross-off | cross-off | cross | on |
High Tide | 1:24AM0.00m | 2:52AM0.00m | 4:23AM0.00m | 10:24AM0.00m | ||||||||||||||||
Low Tide | 2:09PM-0.00m | 3:36PM-0.00m | 5:13PM-0.00m | 7:08PM-0.00m | 9:19PM-0.00m | |||||||||||||||
 |  |  | |  | |  |  |  |  |  | | | | | | | | |  | |
 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — |
 | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — |
mm | — | — | — | — | — | — | — | 8 | 12 | 2 | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 13 | 16 | 15 | 15 | 14 | 17 | 20 | 19 | 16 | 15 | 14 | 13 | 13 | 13 | 13 | 17 | 17 | 19 | 23 | 18 |
Feels °C | 10 | 14 | 14 | 12 | 11 | 12 | 16 | 14 | 12 | 12 | 6 | 7 | 9 | 10 | 8 | 15 | 12 | 12 | 19 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | — | — | — | SW 14 | SW 13 | SW 13 | SW 15 | SW 21 | SW 19 | SW 17 |
| kJ | 1771 | 1643 | 1520 | 1212 | 1108 | 1643 | 1082 | 614 | 393 | 317 | — | — | — | 825 | 488 | 369 | 472 | 959 | 3208 | 2494 |
Swell 2 Height (m) Direction Period (s) | S 17 | W 26 | SW 24 | SW 21 | SW 20 | SE 18 | S 16 | S 16 | SW 20 | SW 18 | — | — | — | SW 19 | SW 18 | SW 16 | SW 24 | SW 14 | — | S 18 |
| kJ | 6 | 13 | 87 | 285 | 373 | 12 | 5 | 5 | 15 | 83 | — | — | — | 58 | 108 | 163 | 22 | 459 | — | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | S 16 | S 15 | S 19 | — | — | — | S 14 | S 14 | — | — | — | S 14 | S 13 | S 16 | — | — | — | — |
| kJ | — | — | 5 | 5 | 29 | — | — | — | 4 | 4 | — | — | — | 4 | 4 | 5 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 4 | — | NNE 4 | N 4 | NNW 4 | SW 13 | SW 16 | SW 14 | — | — | — | — | N 4 | — | — |
| kJ | — | — | — | — | — | 7 | — | 10 | 36 | 19 | 1541 | 2620 | 1712 | — | — | — | — | 20 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 154 | 154 | 51 | 0 | 154 | 0 | 154 | 24 | 133 | 210 | 133 | 398 | 1048 | 1083 | 13 | 24 | 24 | 133 | 249 | 24 |
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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