
Surf Forecasts:
The Island surf forecast from 11 Aug 2026:
- Best quality surf: Friday 14 Aug, 6AM (local time) - 7.5ft (2.3m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 6PM (local time) - 10ft (3.0m), 16s period, SW swell with 5,298 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 6AM (local time) - 7.5ft (2.3m), 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 Friday (Aug 14) at 6AM. The primary swell is predicted to be 2.3m and 17s period with a secondary swell of 0.2m and 18s. 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 3.0m 16s and forecast to arrive on Wednesday (Aug 12) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Monday (Aug 17) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 14th Aug) | 7.5ft (2.3m) 17s |
| Best Surf | 6AM (Fri 14th Aug) | 7.5ft (2.3m) 17s |
| Most Powerful | 6PM (Wed 12th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for The Island over the next 16 days.
The Lowdown
Alright, grab a coffee, 'cause there's a bit of a wait before this one fires up. We're looking at The Island, a consistent reef setup, and honestly, the start of the period is a write-off for clean, rideable waves. We're getting hammered by a massive 7ft to 8ft range of SW swell right off the bat, but it's coming with some seriously ugly cross-onshore wind—25 mph at times—turning it into a complete mess. The water here is sitting at 59°, which is about right for this time of year, so nothing weird going on there.
The first sniff of something good doesn't arrive until Thursday the 13th. The swell is still solid at 8ft from the SW, but the wind eases right off. It's still a cross-on breeze, just a light one, so you're dealing with small wind ripples and questionable tide. Not the best you'll ever surf, but the massive energy (2694) is there. It gets better from here.
Friday the 14th is where we start to see the real promise that gets me excited. The swell eases slightly to a still-chunky 8ft from the SW in the morning, but the wind switches to a lovely light cross-off from the SE. Surf is clean, powerful (2761), and the sets have that deep pulse from the 16-second period. This is serious groundswell, so at a reef like The Island it should hold up nicely. It's advanced territory with that size and period, but it'll be a rippable, lined-up wave. Friday afternoon is nearly as good, just with a touch more breeze.
The standout window, though, is Saturday the 15th and Sunday the 16th. Saturday morning we get a beautiful offshore wind from the E at 15 mph, blowing straight into the face of that SW groundswell. It's still a solid 6ft (1812 energy), super clean, and that moderate offshore breeze will groom it into perfection. This is the best of the bunch—an absolute no-brainer for a dawn patrol. Saturday afternoon stays clean, just a little smaller. Sunday morning is still a winner: a gentler offshore, 4ft of swell, but the period is still a long 14 seconds, keeping it fun and well-shaped on the low tide. Bear in mind crowds can sometimes pop up here, so get in early.
After that, it tapers off through the first part of the following week. Monday the 17th offers clean conditions but smaller surf, around 3ft to 4ft. The energy drops into the 700s. It's still rideable, but the magic of the weekend is gone.
Looking further out, there's a glimmer on Friday the 21st of August. The morning session sees a fresh 6ft SW swell combine with a light cross-off NNE wind, and the report marks it as excellent for experienced surfers. Clean, good energy (1302), but a full week and a half out, so keep an eye on it.
The rest of the second week is a mixed bag of onshores, cross-shore winds, and a couple of big, messy swells. The good news is for a consistent spot like The Island, the lull never lasts forever.
This is Rusty, signing off.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue night. Very mild (max 15°C on Tue afternoon, min 12°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, light winds from the SE by Fri morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Sun morning, min 13°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | W 15 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
Wave Graph | ||||||||||||||||||||
1721 | 3904 | 3904 | 3470 | 2702 | 2668 | 2208 | 2039 | 2733 | 2344 | 2113 | 1787 | 1494 | 1138 | 736 | 726 | 557 | 421 | 793 | 543 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | off | off | cross-off | off | off | cross-off | off | off | cross-off | off |
High Tide | 8:31AM0.00m | 10:29AM0.00m | 12:16PM0.00m | 1:53PM0.00m | 3:27PM0.00m | 5:12PM0.00m | ||||||||||||||
Low Tide | 7:32PM-0.00m | 9:31PM-0.00m | 11:25PM-0.00m | 1:05AM-0.00m | 2:40AM-0.00m | 4:17AM-0.00m | ||||||||||||||
— | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | |
6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | |
mm | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 15 | 15 | 14 | 15 | 15 | 16 | 16 | 16 | 15 | 16 | 16 |
Feels °C | 7 | 5 | 8 | 9 | 11 | 12 | 13 | 13 | 12 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 18 | S 17 | S 17 | S 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
325 | 23 | 22 | 23 | 2702 | 2668 | 2208 | 2039 | 2733 | 2344 | 2113 | 1787 | 1494 | 1138 | 736 | 726 | 557 | 421 | 793 | 543 | |
Swell 2 Height (m) Direction Period (s) | S 18 | — | — | — | SSE 17 | SSE 16 | SSE 16 | SSE 16 | SSE 17 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | S 15 | S 14 | — | SW 13 | SW 22 | SW 20 |
6 | — | — | — | 27 | 26 | 25 | 26 | 28 | 26 | 26 | 25 | 20 | 4 | 4 | 4 | — | 196 | 166 | 455 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 26 | SW 24 | S 16 | S 10 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 87 | 5 | 7 | |
Wind waves Height (m) Direction Period (s) | W 15 | SW 17 | SW 17 | SW 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1721 | 3904 | 3904 | 3470 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 891 | 891 | 1083 | 1075 | 495 | 495 | 154 | 29 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 5 | 0 | 0 | 0 | 0 |
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.











