The Island Surf Break

Lat Long: 33.05° S 134.17° E

The Island Surf Forecast and Surf Report

Issued: 8 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Island sea temperature is
14.9° C
0.6° 

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 20 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 12AM (local time) - 6ft (1.8m), 16s period, SW swell with glassy winds.
  • Most powerful swell: Friday 28 Aug, 3AM (local time) - 8ft (2.4m), 17s period, WSW swell with 3,339 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 12AM (local time) - 6ft (1.8m), 16s 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 Saturday (Aug 22) at 12AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.1m and 26s. 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 2.4m 17s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Thursday (Aug 27) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 22nd Aug)6ft (1.8m) 16s
Best Surf12AM (Sat 22nd Aug)6ft (1.8m) 16s
Most Powerful 3AM (Fri 28th Aug)8ft (2.4m) 17s

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


The Lowdown

Alright folks, Rusty here with the long-range look for The Island. We’ve got a solid 16-day window ahead, but it’s not all blue skies and perfect barrels – there’s some patience needed, especially in the first week. The water temp is sitting about average for this time of year, so no need to dig out the 5/4 just yet.

The pattern starts off a bit average. Friday the 21st has some SW groundswell pushing in at 4 ft, with a very long period around 17 seconds, but the wind is a bit messy – cross-shore and cross-onshore, leaving a slight chop on the surface. The combined energy is moderate (1580) but the quality is just marginal. It’s a “maybe” session, not a standout.

Saturday the 22nd looks a touch cleaner with a morning glass-off under a light northerly breeze. The swell is still solid at 6 ft, period still long (15 seconds), and the energy is moderate (1612). It’s not perfect, but it’s the best of the early weekend. The afternoon gets a bit cross-onshore again.

Sunday the 23rd sees a clean morning with a cross-off wind from the NNE, and the swell holds at 6 ft with a 17-second period. The energy is moderate (1780). This is the first real window where the conditions line up – clean faces, decent power. The Island is a reef, so that long-period groundswell will wrap in nicely. It’s an advanced spot though, so this is for the experienced crew.

Monday the 24th is a write-off – light rain, messy onshore winds, and dropping swell (4 ft, 472 energy). Don’t bother.

Tuesday the 25th gets a bit of a bump in size (7 ft, 2175 energy) but with a fresh cross-shore breeze, it’s lumpy and challenging. This is expert territory at that size, but the wind is against it.

Then we hit a bit of a sweet spot on Wednesday the 26th. Morning brings a clean offshore flow from the north, swell at 5 ft with a 13-second period, and combined energy at 744. The water is clean, the wind is right – this is a solid, fun session for the advanced crew without the heavy crowd pressure. The Island can get crowded sometimes, but the earlier morning window should help.

The real standout, the one that’s got me checking the calendar, is Friday the 28th afternoon. Swell jumps to 8 ft from the SW, period at 16 seconds, and the wind is offshore from the ESE – light and clean. The combined energy is a massive 5820, which is strong. This is big, powerful, and clean. The Island will be handling serious grunt. For experts only, this is the best wave of the forecast. Mark it down.

After that, the first week of September sees a lot of average to marginal conditions. The 4th of September (Friday morning) has a big 8 ft SW swell with 18-second period, combined energy at 3322, but a fresh cross-shore wind makes it lumpy. By the 5th, it’s fading into messy cross-shore winds again. Not the best finish.

Overall, the best on offer is the afternoon of Friday the 28th – that’s the one to aim for. Wednesday the 26th morning is a solid runner-up. The rest of the run is a mixed bag of lumpy, windy, or marginal conditions. If you’re a beginner, you’re better off waiting for a smaller, cleaner day – this forecast is mostly for the advanced crowd.

Rusty out.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Sun afternoon, min 12°C on Fri morning). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 14mm), heaviest on Mon morning. Very mild (max 17°C on Sun night, min 10°C on Tue night). Winds decreasing (strong winds from the SSE on Mon afternoon, calm by Wed afternoon).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
4
3
3
4
3
2
2
0
0
1
1
1
4
3
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SW
15
1.2
SW
17
1.8
SW
16
1.8
SW
16
1.8
SW
15
1.7
SW
15
1.6
SW
15
1.8
SW
17
1.5
SW
16
1.3
SW
15
1.1
SW
14
0.9
SW
14
1.6
SW
17
2.1
SW
16
1.9
SW
15
1.8
SW
14
1.4
SW
13
1.1
SW
13
1
SW
16
Wave Graph
Metric surfscale
Energy kJ
1455
841
1771
1643
1520
1212
1108
1774
1082
686
453
317
1323
2175
1589
1220
690
411
468
Wind (km/h)
15
SW
15
SSW
15
SSW
5
SE
10
N
10
SW
15
E
20
NNE
15
NNW
15
ENE
10
SW
45
SSE
25
SSW
35
SSW
30
S
15
SSE
15
N
15
NW
15
NE
Wind State
cross-on
cross
cross-on
glassy
cross
cross-on
off
cross-off
cross-on
cross-off
cross-on
cross-off
cross
cross
cross
cross-off
cross-off
cross-on
cross-off
High Tide
11:43PM0.00m
1:24AM0.00m
2:52AM0.00m
4:23AM0.00m
Low Tide
12:36PM-0.00m
2:09PM-0.00m
3:36PM-0.00m
5:13PM-0.00m
7:08PM-0.00m
9:19PM-0.00m
part cloud
cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
mod rain
light rain
light rain
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:03
7:03
7:01
7:00
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:07
6:08
6:09
6:09
6:10
 mm
7
5
2
Temp °C
14
13
13
15
14
14
14
17
19
17
13
12
14
13
13
13
11
13
13
Feels °C
11
10
10
13
12
12
11
13
16
13
11
4
9
5
6
8
7
11
10
  • Map Icons:
  • Break
  • 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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