The Island Surf Break

Lat Long: 33.05° S 134.17° E

The Island Surf Forecast and Surf Report

Issued: 8 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's The Island sea temperature is
15.8° C
0.4° 

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 21 Jul 2026:

  • Best quality surf: Friday 24 Jul, 3AM (local time) - 6ft (1.9m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 23 Jul, 9AM (local time) - 8ft (2.5m), 14s period, SW swell with 2,944 kJ wave energy.
  • Next surfable swell (1★+): Friday 24 Jul, 3AM (local time) - 6ft (1.9m), 15s 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 Friday (Jul 24) at 3AM. The primary swell is predicted to be 1.9m and 15s period with a secondary swell of 0.2m and 16s. 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 14s and forecast to arrive on Thursday (Jul 23) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Fri 24th Jul)6ft (1.9m) 15s
Best Surf 3AM (Fri 24th Jul)6ft (1.9m) 15s
Most Powerful 9AM (Thu 23rd Jul)8ft (2.5m) 14s

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


The Lowdown

Righto, let’s have a look at what’s on the cards for The Island. It’s a reef setup, exposed to the SW, so it knows how to pull in a swell. The coming week is a battle with the wind though, and the real gems are hiding a fair way out in the forecast.

We kick off on Tuesday the 21st, but it’s a write-off. The swell is 4ft from the SW with a solid 13-second period, and the energy is moderate at 559, but the wind is a cross-shore from the north, and the water’s sitting at 60°, which is about standard for the time of year. It’s a messy, choppy mess. That afternoon and into Wednesday the 22nd, the wind swings cross-onshore and stays punchy, up to 16 mph. The swell sticks around 4-5ft, but the conditions are poor. Don’t bother.

Thursday the 23rd is where things get serious. The swell jumps to 8ft in the morning from the SW, with a period of 14 seconds, and the energy goes through the roof – 4546. That’s a lot of power. The wind is a cross-shore from the south at 16 mph, so it’s messy, but that’s a big, powerful groundswell for the experts. It’s over 8ft, so this is experienced crew only. The afternoon drops to 7ft, period 15 seconds, still huge energy at 1831, but the wind is still cross-shore and lumpy. It's marginal, but the size is there.

Friday the 24th offers a bit of a breather. The morning has 6ft from the SW, 15-second period, with energy at 1424. The wind is a light cross-shore from the south at only 6 mph, so it’s almost clean with just small ripples. That’s the best the first week gets, but it’s still a “marginal” call. The afternoon gets a bit choppier again.

Saturday the 25th and Sunday the 26th are back to poor conditions, with onshore winds and small, weak swell. The Sunday morning does have a window of clean cross-offshore wind from the NE at 6 mph, but the swell is only 4ft with a short 11-second period, and low energy at 291. It’s clean, but tiny.

Then we hit a long, ugly stretch. From Monday the 27th all the way through to Monday the 3rd of August, the wind is a mess – strong, cross-onshore, and lumpy. The swell fluctuates, but the conditions are poor or marginal at best. The water will be a war zone.

But here’s the standout. Mark your calendar for Tuesday the 4th of August. The morning brings 4ft from the SW with a very long period of 18 seconds, and the energy is strong at 1011. The wind is offshore from the east at 16 mph – clean, lined-up conditions. That’s a proper groundswell, perfect for a reef like this. The water will be clean, the sets will be long and powerful. It’s rated excellent for experienced surfers.

Wednesday the 5th of August is another beauty. The morning has 3ft from the SW, but the period is a massive 20 seconds, and the energy is 957. The wind is offshore from the ENE at 16 mph. It’s smaller, but that period is special – very long, very clean. The afternoon is even better for the size: 4ft, 19-second period, and a gentle offshore breeze from the ESE at 9 mph. The energy is 1144, and the conditions are rated excellent for experienced surfers. That afternoon session on Wednesday the 5th is the pick of the whole forecast.

So, the first week is mostly a fight with the wind, and there’s a big, messy swell for experts on Thursday the 23rd. The real gold is the first week of August – Tuesday the 4th and Wednesday the 5th – with clean, offshore winds and long-period groundswell. Those are the days to get excited about.

Stay patient, and don’t waste your energy on the rubbish days.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Wed night. Very mild (max 16°C on Tue morning, min 12°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SSE by Thu night).

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sat morning. Very mild (max 15°C on Sun night, min 12°C on Fri morning). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
2
1
3
3
2
2
0
0
1
2
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SW
13
1.2
SW
13
1.2
SW
12
1.3
SW
14
1.4
SW
13
1.7
SW
14
2.5
SW
14
2.1
SW
15
2
SW
15
1.8
SW
15
1.6
SW
15
1.4
SW
14
1.2
SW
13
1.2
SW
13
1.2
SW
12
1.1
SW
11
1
SW
11
0.8
SW
11
1.8
WSW
11
2.4
SW
13
1.8
SW
13
Wave Graph
Metric surfscale
Energy kJ
552
464
409
579
694
1187
2944
1808
1832
1399
1108
780
488
466
409
288
250
155
771
1945
1034
Wind (km/h)
20
N
15
NW
25
SW
25
SSW
25
SW
25
S
25
S
25
SSW
20
SSE
10
S
15
SSW
15
SSW
20
WSW
20
WSW
10
S
10
NE
15
WNW
10
NNW
35
NW
45
WNW
45
SSW
Wind State
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross
cross-on
cross
on
cross-on
cross
cross-off
cross-on
cross
cross-on
cross-on
cross-on
High Tide
7:51PM0.00m
10:07PM0.00m
2:17AM0.00m
3:48AM0.00m
5:13AM0.00m
Low Tide
8:56AM-0.00m
11:16AM-0.00m
1:23PM-0.00m
3:04PM-0.00m
4:31PM-0.00m
5:56PM-0.00m
cloud
part cloud
clear
cloud
clear
rain showers
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
light rain
rain showers
rain showers
clear
clear
part cloud
part cloud
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:31
7:30
7:30
7:28
7:28
7:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:47
5:47
5:49
5:50
5:50
5:51
 mm
1
1
1
1
1
Temp °C
16
16
16
14
13
13
13
13
12
12
13
13
13
14
14
14
14
15
15
15
14
Feels °C
11
12
13
10
7
8
7
7
6
8
9
10
9
11
12
12
11
10
6
5
5
  • 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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