Surf Forecasts:
The Island surf forecast from 16 Aug 2026:
- Best quality surf: Monday 17 Aug, 12PM (local time) - 4.5ft (1.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 3PM (local time) - 8ft (2.4m), 16s period, SW swell with 2,866 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 12PM (local time) - 4.5ft (1.4m), 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 Sunday (Aug 16) at 12PM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.1m and 15s. 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 21) at 3PM. 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 4s period and expected on Tuesday (Aug 18) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 16th Aug) | 4.5ft (1.4m) 14s |
| Best Surf | 12PM (Mon 17th Aug) | 4.5ft (1.3m) 16s |
| Most Powerful | 3PM (Fri 21st Aug) | 8ft (2.4m) 16s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright, let’s break it down. The Island is a reef break, exposed to the southwest swell, consistent, and a spot for the advanced crew. Water temp is about 59°F, which is right where you’d expect – nothing strange.
The next few days have some real juice. Sunday morning the 16th, the swell is 5ft from the southwest, with a 14-second period. The combined energy is 829 (moderate), and the wind is a light offshore from the east at 9 mph. It’s clean and glassy – a very good moment for the confident surfer.
Monday the 17th afternoon is a standout. The swell is 4ft, 16-second period, and the energy jumps to 1045 (moderate). The wind is a light offshore from the east-southeast at 6 mph. This is excellent surf for experienced folks – long, lined-up reef waves.
Tuesday the 18th is a mess. The wind cranks from the north-northeast at 19 mph, making it cross-off and choppy. No good.
Wednesday the 19th is onshore from the west – blown out.
Thursday the 20th morning is back on. Light offshore from the east-northeast at 6 mph, a 4ft SW swell, 16-second period, and energy of 798 (moderate). Clean and long period – the reef will love it.
Friday the 21st sees the swell hit 7ft in the morning, but the wind is onshore from the west-northwest. The afternoon is a strong cross-onshore at 25 mph – not a paddle day.
Saturday the 22nd morning has a 7ft SW swell, 15-second period, energy of 2320 (strong), with a light cross-off from the south at 9 mph. Big, powerful reef waves for the experts.
There’s a lull from the 23rd to the 25th, but Monday the 24th morning is a return. 5ft SW swell, 15-second period, energy of 1086 (moderate), and a light offshore from the east-northeast at 6 mph. Excellent, clean, long period.
The 26th and 27th are messy with strong winds.
The last real gem is Friday the 28th morning. 5ft SW swell, 15-second period, energy of 1159 (moderate), and a light offshore from the east at 6 mph. Glassy, clean, and the reef will be firing.
From the 29th to the 31st, it’s all cross-shore winds and chop – not worth it.
Best bets: Monday the 17th afternoon and Friday the 28th morning. Both have clean offshore wind, solid groundswell, and the reef handling it perfectly. The Island will be a rippable, lined-up wave for those who can handle it. Crowds might show, but it’s worth the paddle.
Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Tue afternoon, min 13°C on Sun morning). Winds increasing (light winds from the SSE on Mon afternoon, fresh winds from the NNE by Tue morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Fri afternoon, min 12°C on Thu morning). Winds increasing (calm on Thu morning, fresh winds from the S by Fri night). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SW 17 | WSW 16 | SW 15 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 825 | 726 | 549 | 427 | 875 | 472 | 861 | 611 | 751 | 447 | 881 | 833 | 976 | 823 | 1349 | 2140 | 2866 | 1929 | 1857 | 1761 | 1344 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | on | on | on | cross-on | off | cross | cross-off | glassy | cross-on | cross | cross-off | cross | off |
High Tide | 3:27PM0.00m | 5:12PM0.00m | 9:38PM0.00m | 11:43PM0.00m | 1:24AM0.00m | 2:52AM0.00m | |||||||||||||||
Low Tide | 4:17AM-0.00m | 6:13AM-0.00m | 8:29AM-0.00m | 10:44AM-0.00m | 12:36PM-0.00m | 2:09PM-0.00m | |||||||||||||||
 | |  | | | | | |  | | | | | | |  | | | | | | |
 | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 15 | 16 | 17 | 21 | 15 | 14 | 14 | 13 | 14 | 13 | 13 | 14 | 15 | 13 | 12 | 12 | 12 |
Feels °C | 12 | 11 | 10 | 12 | 13 | 12 | 9 | 17 | 10 | 10 | 11 | 10 | 13 | 10 | 10 | 10 | 11 | 7 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SW 17 | S 17 | SW 15 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 |
| kJ | 825 | 726 | 549 | 427 | 875 | 472 | 861 | 611 | 5 | 447 | 881 | 833 | 976 | 823 | 1349 | 2140 | 2866 | 1929 | 1857 | 1761 | 1344 |
Swell 2 Height (m) Direction Period (s) | S 15 | S 15 | SSE 4 | SW 13 | SW 22 | SW 19 | S 18 | S 18 | — | SW 8 | SW 19 | SW 18 | SW 9 | SW 22 | SW 20 | S 18 | — | S 16 | S 16 | S 17 | S 16 |
| kJ | 4 | 4 | 4 | 196 | 165 | 441 | 6 | 6 | — | 15 | 181 | 258 | 166 | 73 | 455 | 6 | — | 5 | 20 | 6 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 23 | S 16 | S 20 | — | — | — | S 16 | S 16 | S 14 | — | — | S 16 | — | — | — | — | — | — |
| kJ | — | — | — | 86 | 5 | 7 | — | — | — | 5 | 5 | 4 | — | — | 5 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | E 4 | ESE 4 | — | — | NNE 4 | NNE 4 | WSW 16 | WSW 6 | — | — | — | — | — | — | SW 16 | — | — | — | — |
| kJ | — | — | 6 | 8 | — | — | 21 | 22 | 751 | 60 | — | — | — | — | — | — | 1651 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 29 | 0 | 0 | 0 | 5 | 349 | 249 | 250 | 496 | 891 | 154 | 0 | 154 | 0 | 0 | 1074 | 337 | 0 | 154 | 0 |
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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