
Surf Forecasts:
The Island surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 6AM (local time) - 7ft (2.2m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 8ft (2.5m), 19s period, SW swell with 4,509 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 6AM (local time) - 7ft (2.2m), 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 (Sep 06) at 6AM. The primary swell is predicted to be 2.2m and 14s period with a secondary swell of 0.2m 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 2.5m 19s and forecast to arrive on Wednesday (Sep 09) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Wednesday (Sep 09) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 6th Sep) | 7ft (2.2m) 14s |
| Best Surf | 6AM (Sun 6th Sep) | 7ft (2.2m) 14s |
| Most Powerful | 12PM (Wed 9th Sep) | 8ft (2.5m) 19s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it. The Island is the only game in town for this whole 16-day stretch, and it’s a bit of a mixed bag. We’re looking at a solid run of clean, mid-period SW groundswell, but a lot of it gets blown out by strong winds. The water temp is sitting at 60°, which is spot on average for this time of year, so no surprises there.
The first few days are a write-off. Friday afternoon through Saturday is a mess with strong cross-onshore winds and lumpy, poor surf, so don’t even bother. The swell is there, up to 8ft, but it’s just not rideable.
Then we get a window. Sunday morning, September 6th, is the first real standout. We’ve got a clean 7ft SW groundswell with a 14-second period, and here’s the kicker: light ESE offshore winds at just 3 mph. The combined wave energy is moderate (2144), and the conditions are, well, excellent for experienced surfers. This is a reef break, so that long period is going to line up nicely. If you’re up for it, this is the session to target.
Sunday afternoon drops off a bit in size to 6ft, but it’s still clean. Monday the 7th stays clean with offshore winds, but the swell drops to 3-4ft, so it’s smaller but still fun. By Tuesday morning, September 8th, we get another highlight. The wind goes completely glassy, and the swell jumps back to 6ft with a very long 17-second period. The combined energy is strong (1801), and it’s described as excellent for experienced surfers. This is a serious groundswell, so the Island’s reef setup will be handling it beautifully.
Wednesday the 9th is a no-go. The swell is still pumping (7ft to 8ft, 17-18 second periods, combined energy through the roof at 4219), but the wind is howling at 28 mph from the SE, making it cross-off and messy. It’s more of a kite-surfing day than a paddle-surfing day.
The following week, from the 10th to the 16th, is a bit of a waiting game. The swell stays in the 2ft to 5ft range with mostly clean conditions, but the winds are often fresh or strong, so the quality is marginal. The best of that stretch is probably Thursday morning, September 10th, with a clean 7ft swell and fresh offshore winds, and then Wednesday morning, September 16th, with a clean 5ft and offshore winds. But nothing is firing like that Sunday or Tuesday.
Now, for the long-range. September 18th (Friday) is the other big one to circle on your calendar. We’re looking at a 10ft SW swell on the morning (combined energy 2757) and a solid 8ft on the afternoon, both with a 13-second period. The afternoon session has light 6 mph winds, and it’s rated excellent for experienced surfers. That’s a big swell, so it’s experts-only, but it could be a proper end-of-season score. The Saturday after that, September 19th, still has size (8ft) but cross-on winds will chop it up a bit.
So, to wrap it up: your standouts are first thing Sunday morning, September 6th, and Tuesday morning, September 8th. If you’re looking further ahead, keep an eye on Friday, September 18th, but that’s a long way off and less certain. The crowds are ‘sometimes’ an issue at The Island, so you might have some company on those good days.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Fri afternoon, min 11°C on Sun night). Winds decreasing (strong winds from the WSW on Fri night, light winds from the SSE by Sat night). | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Tue morning. Very mild (max 16°C on Mon afternoon, min 7°C on Thu morning). Winds increasing (calm on Tue morning, strong winds from the SE by Wed morning). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 15 | SW 15 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 18 | SW 17 | SW 16 | SW 16 | SSW 15 |
Wave Graph | ||||||||||||||||||||
2075 | 1641 | 2124 | 2205 | 2229 | 1549 | 1238 | 503 | 330 | 412 | 1624 | 1795 | 1381 | 1314 | 2302 | 3657 | 3459 | 2316 | 1953 | 1368 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | off | cross-off | cross-off | off | off | off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off |
High Tide | 00:45AM0.00m | 2:23AM0.00m | 4:06AM0.00m | 6:00AM0.00m | 8:01AM0.00m | 9:54AM0.00m | ||||||||||||||
Low Tide | 1:33PM-0.00m | 3:13PM-0.00m | 5:01PM-0.00m | 7:01PM-0.00m | 9:00PM-0.00m | 10:44PM-0.00m | ||||||||||||||
— | — | 6:47 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | |
6:16 | — | — | 6:17 | — | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — | — | 6:21 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 8 | 1 | 5 | — | — | — | — | — | — |
Temp °C | 19 | 17 | 13 | 13 | 12 | 13 | 13 | 13 | 13 | 16 | 16 | 12 | 13 | 13 | 12 | 13 | 10 | 12 | 15 | 11 |
Feels °C | 15 | 13 | 4 | 7 | 8 | 10 | 9 | 7 | 9 | 12 | 12 | 12 | 10 | 7 | 3 | 3 | 2 | 5 | 8 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 15 | S 16 | S 17 | S 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 18 | SW 17 | SW 16 | SW 16 | SSW 15 |
2075 | 19 | 6 | 15 | 2229 | 1549 | 1238 | 503 | 330 | 412 | 1624 | 1795 | 1381 | 1314 | 2302 | 3657 | 3459 | 2316 | 1953 | 1368 | |
Swell 2 Height (m) Direction Period (s) | SSE 16 | — | — | — | S 15 | SW 16 | S 14 | SW 23 | SE 5 | SW 20 | SSW 13 | S 18 | S 17 | — | SW 20 | — | — | SSE 18 | SW 26 | SW 25 |
25 | — | — | — | 19 | 595 | 4 | 21 | 5 | 264 | 555 | 6 | 6 | — | 1917 | — | — | 31 | 26 | 24 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 21 | S 21 | — | — | — | — | — | — | — | — | SW 26 | SW 25 |
— | — | — | — | — | — | — | — | 71 | 8 | — | — | — | — | — | — | — | — | 27 | 24 | |
Wind waves Height (m) Direction Period (s) | NW 4 | SW 15 | SW 12 | SW 14 | — | — | — | SSE 5 | ENE 3 | ESE 3 | SE 4 | — | — | SSE 4 | SSE 6 | SE 5 | ENE 4 | ESE 4 | ESE 5 | ESE 5 |
11 | 1641 | 2124 | 2205 | — | — | — | 50 | 7 | 6 | 14 | — | — | 23 | 100 | 45 | 5 | 26 | 35 | 67 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 412 | 1073 | 1123 | 1287 | 154 | 0 | 154 | 89 | 0 | 0 | 0 | 0 | 13 | 337 | 1497 | 1406 | 337 | 335 | 210 | 337 |
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.










