Surf Forecasts:
The Island surf forecast from 18 Aug 2026:
- Best quality surf: Sunday 23 Aug, 6AM (local time) - 6ft (1.8m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 12PM (local time) - 6ft (1.8m), 17s period, SW swell with 1,927 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 3AM (local time) - 5ft (1.5m), 17s 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 Thursday (Aug 20) at 3AM. The primary swell is predicted to be 1.5m and 17s period with a secondary swell of 0.1m and 18s. 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 1.8m 17s and forecast to arrive on Friday (Aug 21) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 23) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 20th Aug) | 5ft (1.5m) 17s |
| Best Surf | 6AM (Sun 23rd Aug) | 6ft (1.8m) 17s |
| Most Powerful | 12PM (Fri 21st Aug) | 6ft (1.8m) 17s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright, Rusty here again, same deal but in feet and miles per hour.
The Island is callin’ with a long run of south-west groundswell. Wednesday the 19th starts with 6ft to 5ft from the WSW but a moderate onshore wind has it all messy. Pass on that one.
Thursday the 20th morning cleans up a bit: 5ft SW, 16-second period, light cross-shore. Still marginal with tide issues. That long period, over 15 seconds, gives the waves real power. On this reef, that means nice, rippable walls.
Friday the 21st afternoon gets 6ft SW at 17 seconds, combined energy (1865) is strong, but a bit of cross-chop keeps it from bein’ perfect.
Saturday the 22nd morning is your first standout. Clean with a light, cross-offshore breeze from the NNE. Swell is 6ft from the SW, 15 seconds. Reef will be workin’ beautifully. Water temp is about what you’d expect for late August. Sometimes a few people out, but worth it.
Sunday the 23rd morning stays clean, 6ft SW, 17 seconds, but just not as crisp as Saturday.
Monday the 24th is small and Tuesday the 24th has junk wind, but Tuesday the 25th bounces back. Morning has a light offshore from the ENE, 4ft SW at 13 seconds, clean. Afternoon holds clean with 5ft and a cross-offshore breeze.
Wednesday the 26th through Thursday the 27th are blown out by strong onshore winds. Thursday afternoon hits 7ft SW but the wind is a fresh cross-onshore, so it’s nasty. Big and ugly—experts only if it were clean.
Friday the 28th cleans up again: 6ft SW at 16 seconds, clean but a moderate breeze keeps it marginal.
Saturday the 29th is a gem. Morning with a moderate offshore, 4ft SW, clean. Afternoon glassin’ off with a light offshore, 4ft SW, 12 seconds. Excellent.
Sunday the 30th afternoon is a standout. Gentle offshore from the ESE, 5ft SW, 17-second period, combined energy of 1193. Couldn’t ask for better on this reef.
Monday the 31st morning holds: gentle offshore, 5ft SW, 16 seconds, clean.
Tuesday the 1st of September: light offshore, 5ft SW, 14 seconds, clean and good.
The swell fades a bit after that, but Thursday the 3rd morning shows a bump back to 6ft SW with a cross-offshore breeze. Clean, but it’s far out.
Your two best bets: Saturday the 22nd morning and Sunday the 30th afternoon. Clean, solid, and The Island at its finest.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Wed morning, min 13°C on Thu night). Winds decreasing (fresh winds from the W on Tue night, light winds from the N by Wed night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Sun afternoon, min 13°C on Fri night). Winds increasing (calm on Sun night, fresh winds from the S by Mon afternoon). | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | WSW 16 | WSW 15 | WSW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SW 17 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 1104 | 1292 | 987 | 928 | 906 | 940 | 1135 | 951 | 1859 | 1643 | 1581 | 1229 | 1108 | 1643 | 1082 | 614 | 453 | 440 | 380 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross | cross | on | cross | cross | cross | cross-off | cross-off | cross-on | off | cross-off | on | cross-off | cross-on | cross | cross-off |
High Tide | 9:38PM0.00m | 11:43PM0.00m | 1:24AM0.00m | 2:52AM0.00m | 4:23AM0.00m | ||||||||||||||
Low Tide | 8:29AM-0.00m | 10:44AM-0.00m | 12:36PM-0.00m | 2:09PM-0.00m | 3:36PM-0.00m | 5:13PM-0.00m | |||||||||||||
 |  |  |  | | |  |  | | | | | | | | | | | | |
 | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — |
 | 6:06 | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 14 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 14 | 14 | 14 | 16 | 17 | 17 | 16 | 14 | 14 |
Feels °C | 8 | 10 | 9 | 12 | 12 | 12 | 12 | 9 | 11 | 11 | 12 | 11 | 11 | 12 | 14 | 16 | 13 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 16 | WSW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 17 | SW 16 | SW 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 |
| kJ | 5 | 5 | 987 | 928 | 906 | 940 | 1135 | 671 | 1859 | 1643 | 1581 | 1229 | 1108 | 1643 | 1082 | 614 | 453 | 440 | 380 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 19 | SW 18 | S 17 | SW 9 | SW 19 | SW 17 | S 18 | W 26 | SW 24 | SW 21 | SW 19 | S 18 | S 16 | S 16 | SW 20 | SW 19 | SW 18 |
| kJ | — | — | 181 | 258 | 6 | 77 | 432 | 951 | 6 | 13 | 87 | 285 | 510 | 6 | 5 | 5 | 63 | 96 | 249 |
Swell 3 Height (m) Direction Period (s) | — | — | S 16 | — | — | S 16 | S 16 | S 17 | — | — | S 16 | S 15 | S 19 | — | — | — | S 15 | S 14 | S 14 |
| kJ | — | — | 5 | — | — | 5 | 5 | 6 | — | — | 5 | 5 | 7 | — | — | — | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | WSW 16 | WSW 15 | WSW 9 | — | — | — | — | — | — | — | — | — | — | NNE 3 | — | — | — | — | SW 5 |
| kJ | 1104 | 1292 | 212 | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | 23 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 356 | 824 | 891 | 13 | 24 | 495 | 356 | 356 | 479 | 0 | 0 | 346 | 0 | 24 | 250 | 0 | 356 | 337 | 148 |
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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