Surf Forecasts:
The Island surf forecast from 20 Aug 2026:
- Best quality surf: Saturday 22 Aug, 12AM (local time) - 6ft (1.8m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 3AM (local time) - 7.5ft (2.3m), 16s period, SW swell with 2,702 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 12AM (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 12AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.1m and 26s. 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 2.3m 16s and forecast to arrive on Tuesday (Aug 25) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 22nd Aug) | 6ft (1.8m) 16s |
| Best Surf | 12AM (Sat 22nd Aug) | 6ft (1.8m) 16s |
| Most Powerful | 3AM (Tue 25th Aug) | 7.5ft (2.3m) 16s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright, Rusty here, switching to feet and Fahrenheit.
This stretch is all about The Island, a reef break that's exposed to the SW. The water temp is sitting at 59°, which is about 1° colder than normal for this time of year – just a touch of a chill in the water.
We've got a bit of a slow start, but the first real action worth looking at shapes up for the morning of Saturday, August 22nd. The Island is looking clean with a 5ft SW swell, a 15-second period, and a light cross-offshore breeze from the NNE. The combined energy is pumping at 1612, which is a solid, strong push of water. The wind is light, so the surface should be clean. This is for experienced surfers, which is no surprise given the size and the reef setup. The morning is the standout window.
The Sunday morning, August 23rd is also worth a mention. We're looking at a similar setup: 6ft SW swell and a 17-second period, with a cross-offshore breeze from the NNE again. The combined energy is even stronger at 1669. It's clean, but the forecast is a bit more marginal on the conditions, so Saturday morning is the better bet.
Then we hit a rough patch. From Sunday afternoon all the way through to the end of the month, the wind turns onshore or cross-onshore, and the quality really drops off. The swell sticks around, but the wind is just too messy for a good paddle. It's a long stretch of poor to marginal conditions.
The good news is that the first days of September bring a glimmer of hope. The morning of Tuesday, September 3rd might be a dark horse, but the wind is a mess. The morning of Friday, September 4th looks a bit more promising with a 7ft SW swell and a 15-second period, but the wind is a moderate cross-shore, which will put a chop on the surface. It's a marginal call, but it’s the best we’ve seen in a while.
For the beginner surfers, watch out for the swell peaking over 7ft during the first week of September – that's expert territory on a reef break.
Saturday morning, August 22nd is the clear winner here. Get it while it's clean.
- Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Thu morning, min 12°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sun afternoon, min 10°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 16 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 906 | 940 | 1455 | 841 | 1771 | 1643 | 1520 | 1212 | 1020 | 1663 | 1082 | 686 | 447 | 371 | 774 | 1349 | 992 | 813 | 543 | 305 | 451 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross | cross | cross-off | cross-off | cross-on | off | cross-off | cross-on | cross-on | glassy | cross-on | cross | cross | cross | off | cross-off | cross-on | cross-off |
High Tide | 11:43PM0.00m | 1:24AM0.00m | 2:52AM0.00m | 4:23AM0.00m | |||||||||||||||||
Low Tide | 10:44AM-0.00m | 12:36PM-0.00m | 2:09PM-0.00m | 3:36PM-0.00m | 5:13PM-0.00m | 7:08PM-0.00m | 9:19PM-0.00m | ||||||||||||||
 | |  |  |  | | | | | | | | | | | | |  | | | | |
 | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 12 | 13 | 14 | 15 | 14 | 14 | 16 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 12 | 13 | 17 | 17 |
Feels °C | 12 | 11 | 11 | 9 | 10 | 11 | 13 | 11 | 11 | 12 | 14 | 13 | 14 | 12 | 11 | 8 | 9 | 10 | 9 | 15 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 906 | 940 | 1455 | 733 | 1771 | 1643 | 1520 | 1212 | 1020 | 1663 | 1082 | 686 | 447 | 371 | 774 | 1349 | 992 | 813 | 543 | 305 | 451 |
Swell 2 Height (m) Direction Period (s) | S 17 | S 16 | SW 19 | SW 17 | S 17 | W 26 | SW 24 | SW 21 | SW 19 | S 18 | S 16 | S 16 | SW 20 | SW 18 | SW 13 | S 15 | S 15 | S 14 | S 13 | SW 16 | WSW 23 |
| kJ | 6 | 5 | 432 | 841 | 6 | 13 | 87 | 285 | 446 | 6 | 5 | 5 | 15 | 84 | 282 | 5 | 4 | 4 | 3 | 42 | 50 |
Swell 3 Height (m) Direction Period (s) | — | — | S 16 | S 17 | — | — | S 16 | S 15 | S 19 | — | — | — | S 14 | S 14 | S 17 | — | — | — | — | S 13 | S 14 |
| kJ | — | — | 5 | 6 | — | — | 5 | 5 | 7 | — | — | — | 4 | 4 | 6 | — | — | — | — | 3 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 5 | SW 5 | — | — | NW 3 | N 3 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17 | 12 | — | — | 3 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 154 | 891 | 154 | 337 | 154 | 0 | 0 | 154 | 0 | 24 | 154 | 24 | 0 | 337 | 495 | 398 | 154 | 0 | 24 | 24 | 154 |
Best forecast wave conditions in Eyre Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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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