Surf Forecasts:
Cape Kersaint surf forecast from 16 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 9PM (local time) - 11ft (3.5m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Tuesday 22 Sep, 3PM (local time) - 11ft (3.5m), 17s period, SSW swell with 7,712 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 9PM (local time) - 11ft (3.5m), 15s period with SW swell.
Best Forecast Surf Conditions for Cape Kersaint this week:
The surf forecast for Cape Kersaint over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 16) at 9PM. The primary swell is predicted to be 3.5m and 15s period with a secondary swell of 2.5m and 15s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Cape Kersaint in the next 16 days are 3.5m 17s and forecast to arrive on Tuesday (Sep 22) 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 6s period and expected on Sunday (Sep 20) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 16th Sep) | 11ft (3.5m) 15s |
| Best Surf | 9PM (Wed 16th Sep) | 11ft (3.5m) 15s |
| Most Powerful | 3PM (Tue 22nd Sep) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Cape Kersaint over the next 16 days.
Short Range ForecastMostly dry. Warm (max 24°C on Sat morning, min 9°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 9°C on Mon night). Mainly fresh winds. | |||||||||||||||||||
Wed 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||
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 14 | SSW 14 | SSW 17 | SW 17 | SW 16 | SW 14 | SW 13 | SW 12 | SW 15 | SW 16 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 15 | SSW 17 | SSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5995 | 4584 | 2483 | 1831 | 2862 | 2162 | 1394 | 731 | 495 | 392 | 1237 | 1776 | 2626 | 3657 | 4826 | 4984 | 5187 | 4809 | 7712 | 4612 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross | on | cross-on | cross-on | cross | cross-off | cross-off | off |
High Tide | 2:26AM1.01m | 1:22PM0.75m | 2:54AM0.96m | 1:15PM0.71m | 3:24AM0.89m | 12:32PM0.70m | 4:04AM0.81m | 10:11AM0.82m | 10:34AM0.89m | 00:07AM0.61m | ||||||||||
Low Tide | 7:29PM0.16m | 8:32AM0.50m | 7:42PM0.18m | 8:54AM0.58m | 7:52PM0.21m | 9:16AM0.66m | 7:51PM0.26m | 9:01AM0.74m | 7:30PM0.31m | 6:49PM0.34m | 6:17PM0.33m | |||||||||
 |  |  | | | | | | | | | | |  | | | | | |  | |
 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — |
 | 6:12 | — | — | 6:13 | — | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 10 | 13 | 13 | 14 | 19 | 20 | 18 | 24 | 24 | 20 | 21 | 16 | 14 | 12 | 12 | 10 | 15 | 16 | 17 |
Feels °C | 7 | 6 | 11 | 11 | 10 | 12 | 14 | 12 | 18 | 19 | 15 | 13 | 10 | 8 | 7 | 7 | 5 | 10 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SSW 14 | SSW 17 | SW 17 | SW 16 | SW 14 | SW 13 | SW 12 | SW 15 | SW 16 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SW 15 | SSW 17 | SSW 15 |
| kJ | 5995 | 4584 | 2483 | 1831 | 2862 | 2162 | 1394 | 731 | 495 | 392 | 1237 | 1776 | 1862 | 3657 | 4826 | 4984 | 5187 | 4809 | 7712 | 4612 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SW 15 | S 24 | SW 14 | SSW 18 | — | SSW 16 | WSW 7 | W 8 | SW 18 | W 6 | — | — | SSW 19 | — | WSW 13 | — | SSW 15 | — | — |
| kJ | 422 | 2650 | 11 | 938 | 692 | — | 582 | 82 | 122 | 161 | 28 | — | — | 199 | — | 294 | — | 2721 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | S 24 | SW 21 | — | — | — | — | SW 19 | NE 4 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 11 | 18 | — | — | — | — | 94 | 1 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNW 4 | WNW 5 | W 7 | — | W 7 | N 3 | WNW 6 | SW 14 | SW 14 | — | — | — | E 5 | E 5 | — |
| kJ | — | — | — | — | — | 13 | 42 | 120 | — | 82 | 7 | 100 | 2626 | 2708 | — | — | — | 39 | 31 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 93 | 45 | 5 | 43 | 5 | 88 | 86 | 86 | 86 | 85 | 5 | 663 | 664 | 45 | 885 | 88 | 112 | 88 | 24 | 24 |
Best forecast wave conditions in Kangaroo Island | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cape Kersaint surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Cape Kersaint Surf forecast
The above surf forecast table for Cape Kersaint provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cape Kersaint can be found by selecting the local surf guide option on the grey menu. Our Cape Kersaint 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 (Cape Kersaint) 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 Cape Kersaint 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 Kangaroo Island? If you are looking for accommodation near Cape Kersaint, camping, hotels and holiday cottages in Kangaroo Island, consider staying in Kingscote which is 62 km (39 miles) away.
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