Surf Forecasts:
The Island surf forecast from 30 Aug 2026:
- Best quality surf: Monday 31 Aug, 6PM (local time) - 5ft (1.6m), 17s period, SW swell with glassy winds.
- Most powerful swell: Saturday 5 Sep, 12PM (local time) - 8ft (2.5m), 17s period, SW swell with 3,746 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 6PM (local time) - 5ft (1.6m), 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 Monday (Aug 31) at 6PM. The primary swell is predicted to be 1.6m and 17s period with a secondary swell of 0.2m and 18s. The wind is predicted to be glassy 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 Saturday (Sep 05) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Sep 06) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 31st Aug) | 5ft (1.6m) 17s |
| Best Surf | 6PM (Mon 31st Aug) | 5ft (1.6m) 17s |
| Most Powerful | 12PM (Sat 5th Sep) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Hey, Rusty here, checking the charts for The Island over the next couple weeks. It’s a slow start, but there’s a couple real gems hiding in there if you’re willing to wait.
We kick off on Monday, August 31st with a solid 6ft SW groundswell, long 19-second period, and a solid 20 mph cross-off breeze from the NNE. The wave energy is reading 2175 (moderate), but there’s some funky tide stuff going on. It’s clean, but not the best of the run.
Tuesday the 1st and Wednesday the 2nd are total washouts with strong winds and cruddy conditions. Don’t bother.
Thursday the 3rd is still messy with a 6ft swell but onshore wind. Friday the 4th morning cleans up a bit with a 7ft SW swell and a NE cross-off wind at 20 mph, but the score is low. It’s a session for the die-hards.
Your first real green light is Sunday, September 6th in the afternoon. The wind goes glassy light from the ENE, the swell is a manageable 5ft with a 14-second period, combined energy at 890 (weak wave energy), and it’s labeled “expect very good surf conditions.” That’s your first proper go.
Now, the big one. Wednesday, September 9th morning. This is the standout of the whole forecast. We’ve got a strong 8ft SW groundswell with a long, powerful 19-second period. The combined energy is pumping at 4885 (strong wave energy). The wind is pure offshore from the ESE at just 6 mph, glassy clean. The data calls it “excellent surf conditions for experienced surfers,” and for a reef like The Island, 8ft is serious. This is your day if you’ve got the skills. It’s a long-period groundswell, so expect big gaps between sets, but the waves will have power and shape.
Thursday the 10th is still okay with a 7ft SW swell and cross-off wind, but not as good as Wednesday.
Looking further out, Sunday, September 13th morning shows promise. A 7ft SW swell with an 18-second period, combined energy at 2997 (moderate wave energy), and light offshore wind from the E at 3 mph. It’s labeled as “excellent surf conditions for experienced surfers.” That’s a long-range possibility, so don’t bank on it, but keep it in mind.
The rest of the second week is mostly marginal with onshore winds and strong westerlies blowing things out, like Monday the 14th afternoon with 8ft and 25 mph winds. That’s a mess.
So, the absolute pick is Wednesday, September 9th morning. Sunday the 13th morning is your promising long-shot.
Water temp is about normal for this time of year, nothing unusual.
This whole run is groundswell-driven with very long periods. The Island is a reef, so it can handle it, but you’ll be waiting for sets. Worth it on those good days.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Mon afternoon, min 13°C on Tue night). Winds increasing (calm on Mon afternoon, strong winds from the N by Tue morning). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm (max 20°C on Fri morning, min 12°C on Sat night). Winds increasing (calm on Thu afternoon, fresh winds from the WSW by Fri night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 19 | SW 18 | SW 16 | SW 15 | WSW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 12 |
Wave Graph | |||||||||||||||||||||
2146 | 1880 | 1210 | 674 | 1421 | 1225 | 853 | 1187 | 1500 | 1270 | 1215 | 2150 | 1968 | 1850 | 1606 | 3263 | 3657 | 3263 | 1308 | 3364 | 2427 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross | on | cross-on | on | on | on | cross-on | on | cross-off | cross | on | on | cross-on | on | cross-off | cross-off | cross-on | cross-on |
High Tide | 5:12PM0.00m | 7:05PM0.00m | 9:06PM0.00m | 11:01PM0.00m | 00:45AM0.00m | 2:23AM0.00m | |||||||||||||||
Low Tide | 6:07AM-0.00m | 8:05AM-0.00m | 10:05AM-0.00m | 11:54AM-0.00m | 1:33PM-0.00m | 3:13PM-0.00m | |||||||||||||||
6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — | |
— | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:17 | — | — | 6:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | 8 | 3 |
Temp °C | 19 | 21 | 21 | 21 | 18 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 20 | 18 | 15 | 14 | 14 | 14 | 18 | 12 | 14 |
Feels °C | 14 | 17 | 16 | 13 | 14 | 10 | 10 | 9 | 10 | 13 | 12 | 13 | 15 | 13 | 8 | 10 | 10 | 6 | 8 | -1 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 19 | SW 18 | SW 16 | SW 15 | SW 15 | S 17 | SW 16 | S 16 | S 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | S 15 | SW 16 | SW 16 | SW 16 | SW 15 | S 14 | — |
2146 | 1880 | 1210 | 674 | 891 | 6 | 853 | 5 | 5 | 1270 | 1215 | 2150 | 1968 | 1850 | 18 | 3263 | 3657 | 3263 | 1308 | 4 | — | |
Swell 2 Height (m) Direction Period (s) | S 19 | S 18 | S 16 | S 16 | SW 18 | — | S 16 | — | — | S 14 | S 15 | SSE 17 | SSE 16 | S 15 | — | S 17 | SSE 18 | SSE 17 | S 15 | — | — |
29 | 24 | 5 | 5 | 534 | — | 5 | — | — | 4 | 17 | 29 | 24 | 19 | — | 23 | 30 | 29 | 18 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNW 4 | WSW 17 | SW 16 | SW 6 | SW 14 | SW 14 | — | — | — | — | NW 4 | SW 15 | — | — | — | N 5 | SW 14 | SW 12 |
— | — | — | 43 | 1421 | 1225 | 39 | 1187 | 1500 | — | — | — | — | 7 | 1606 | — | — | — | 74 | 3364 | 2427 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 154 | 24 | 24 | 1428 | 356 | 891 | 939 | 891 | 154 | 154 | 154 | 24 | 995 | 1074 | 1306 | 1553 | 1593 | 13 | 496 | 479 | 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.











