The Island Surf Break

Lat Long: 33.05° S 134.17° E

The Island Surf Forecast and Surf Report

Issued: 8 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's The Island sea temperature is
15.6°C
0.3° 

The Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


The Island surf forecast from 4 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 6AM (local time) - 7ft (2.1m), 14s period, SW swell with glassy winds.
  • Most powerful swell: Wednesday 9 Sep, 3PM (local time) - 8ft (2.5m), 18s period, SW swell with 4,315 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 6AM (local time) - 7ft (2.1m), 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 2.1m and 14s period with a secondary swell of 0.2m and 15s. 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 18s and forecast to arrive on Wednesday (Sep 09) at 3PM. 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 5s period and expected on Wednesday (Sep 09) at 9PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sun 6th Sep)7ft (2.1m) 14s
Best Surf 6AM (Sun 6th Sep)7ft (2.1m) 14s
Most Powerful 3PM (Wed 9th Sep)8ft (2.5m) 18s

Table - best surf conditions forecast for The Island over the next 16 days.


The Lowdown

Right, let’s have a look at what we’ve got for The Island. This is a reef break, and it’s the only game in town for the next couple of weeks. We’re in for a bit of a mixed bag, with a standout day on the 6th and another promising window around the 16th and 18th.

The forecast starts on Friday, 4th September, but honestly, it’s not worth getting excited about. We’ve got a solid 7 ft SW groundswell with a period of 16 seconds, so there’s plenty of energy (2293), but the wind is a messy cross-shore at 19 mph. The water is sitting at 60°, which is pretty much what you’d expect for this time of year. Friday afternoon and Saturday are a write-off with strong cross-onshore winds and similar messy conditions. Saturday has 8 ft swell, but the wind is just too ugly.

Now, Sunday the 6th is our first real standout. The morning is looking magic. We have a clean 7 ft SW groundswell, a period of 14 seconds, and the wind is a glassy offshore easterly at just 3 mph. The combined energy is strong at 2144. This is a proper reef-breaking wave, and with that light offshore, the conditions will be damn near perfect for experienced surfers. This is the one to circle. The afternoon drops to a cleaner 6 ft, but the wind goes cross-off, still a good session, but the morning is the call.

Monday the 7th is smaller, around 3 ft to 4 ft, with some clean windows on offer, but it won’t have the punch of Sunday. Tuesday the 8th sees a new pulse of long-period SW groundswell, 6 ft at 17 seconds, with a gentle offshore breeze. The energy is solid (1801). This will be a nice, clean reef wave, but that long period can make it a bit straight at times – it’ll be peeling nicely at The Island.

Wednesday the 9th is a bit of a tease. We have a big, long-period swell (8 ft to 8 ft at 18-20 seconds, with a massive energy of 4189-4353), but the wind is a strong cross-off at 25 mph. It’s clean, but that strong wind will make it a challenging paddle and the wave might get a bit bumpy. Not the best for a casual session.

The following week thins out a bit. The 10th and 11th offer some clean, smaller waves (4 ft to 6 ft), but nothing that screams “must-go.” From the 12th through the 14th, the swell drops right off, and the wind turns onshore or cross-shore, leaving us with poor, lumpy conditions. It's a real flat spell in the middle.

We do get one more big pulse on the 15th of September. The afternoon brings a 10 ft SW swell at 14 seconds, with a strong energy of 3336, and a cross-off wind. That’s big. For anyone not on a gun or a step-up, it’ll be a handful.

The next true standout is the 16th. The afternoon is a gem: 8 ft SW groundswell, 14 seconds, and the wind is glassy, completely calm. That’s a rare treat. It’ll be a clean, heavy reef wave, definitely one for the experienced crew only.

Then, on the 18th of September, we have another banger. The afternoon session is top-tier: 8 ft SW groundswell, a very long 18-second period, a moderate offshore wind, and a combined energy of 3176. This is a potent, clean groundswell. The morning is also big at 8 ft, but with a strong offshore wind that’ll be hard to get into. The afternoon is the real sweet spot.

To sum it up: you have two must-surf days: the morning of Sunday the 6th, and the afternoons of the 16th and the 18th. The 16th and 18th are the long-range calls, so keep an eye on them, but the 6th is locked in. There's a flat spell from the 12th to the 14th, so don't bother then. For the rest, it’s patchy. The Island is a consistent, exposed break, so it’ll always have something, but the wind is the key. Good luck out there.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Fri morning, min 10°C on Sun night). Winds decreasing (strong winds from the WSW on Fri night, calm by Sat night).

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Tue afternoon. Very mild (max 16°C on Mon afternoon, min 8°C on Wed night). Winds increasing (light winds from the SW on Tue morning, strong winds from the SE by Wed morning).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
2
4
3
1
1
3
3
4
3
2
2
2
4
2
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
SW
16
2.1
SW
15
1.9
SW
15
2.5
SW
12
2.5
SW
13
2.4
SW
14
2.1
SW
14
1.8
SW
14
1.2
SW
13
1
SW
13
1.1
SW
13
1.8
SW
18
1.8
SW
17
1.6
SW
16
1.6
SW
16
2.3
SW
20
2.5
SW
18
2.5
SW
17
2.1
SW
16
1.9
SW
16
1.7
SW
15
Wave Graph
Metric surfscale
Energy kJ
2266
2075
1641
1952
2140
2261
1549
1238
503
330
412
2127
1795
1381
1314
4189
4315
3583
2316
1832
1359
Wind (km/h)
30
N
25
WNW
35
W
40
WSW
30
WSW
15
SW
5
E
20
SSE
35
SE
30
E
10
SSE
30
ESE
15
E
20
SE
35
SE
40
SE
40
SE
35
ESE
35
E
20
ESE
30
E
Wind State
cross
cross-on
on
cross-on
cross-on
cross-on
off
cross-off
cross-off
off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
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
11:54AM-0.00m
1:33PM-0.00m
3:13PM-0.00m
5:01PM-0.00m
7:01PM-0.00m
9:00PM-0.00m
10:44PM-0.00m
cloud
cloud
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
cloud
light rain
light rain
cloud
cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:47
6:45
6:43
6:43
6:41
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:17
6:17
6:19
6:19
6:20
6:21
 mm
2
3
Temp °C
20
19
17
13
13
12
13
13
13
15
16
14
15
12
13
12
14
10
13
18
14
Feels °C
14
15
14
4
7
8
10
9
7
11
14
8
13
8
9
4
6
2
7
12
6
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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