Surf Forecasts:
Pennington Bay surf forecast from 13 Sep 2026:
- Best quality surf: Thursday 17 Sep, 6AM (local time) - 7ft (2.1m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 6PM (local time) - 10ft (3.0m), 14s period, SSW swell with 3,408 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 6AM (local time) - 7ft (2.1m), 14s period with S swell.
Best Forecast Surf Conditions for Pennington Bay this week:
The surf forecast for Pennington Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 17) at 6AM. The primary swell is predicted to be 2.1m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Pennington Bay in the next 16 days are 3.0m 14s and forecast to arrive on Tuesday (Sep 15) 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 1.5m 5s period and expected on Saturday (Sep 19) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 17th Sep) | 7ft (2.1m) 14s |
| Best Surf | 6AM (Thu 17th Sep) | 7ft (2.1m) 14s |
| Most Powerful | 6PM (Tue 15th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Pennington Bay over the next 16 days.
The Lowdown
Alright, let’s break this down for you imperial-style. Rusty here, same story, different numbers.
The next few days are a write-off. We’ve got swell, sure, but the wind is cross-onshore and killing any chance of a decent wave. Combined swell energy is moderate to strong, but it’s all messy. Water temp is about 59°F, right on average for this time of year.
Thursday, September 17th is where it all comes together. A clean 6ft south swell with a light cross-off breeze in the morning, turning to a gentle offshore by the afternoon, dropping to 6ft. The combined energy is strong, and the 14-second period gives you real groundswell. This is the standout day – clean, punchy, and worth the paddle. Crowds are likely at Pennington Bay when it’s good.
Monday, September 21st brings a serious 8ft south swell in the morning with a moderate offshore breeze. The combined energy is 2747, so it’s got real power. By the afternoon, it’s up to 10ft with a 17-second period – that’s long-period groundswell, perfect for this sandbar, but only for the experienced crew.
Tuesday, September 22nd is another good day for the advanced surfer. 8ft in the morning, dropping to 7ft in the afternoon, with light cross-off winds all day. The 16-second period gives you long, powerful lines.
After that, the swell drops and the wind turns nasty again. By September 27th and 28th, we’re looking at 15ft to 16ft swells, but it’s just too big for this break. That’s kite surf territory.
So, your best bet is Thursday 17th for the best all-around conditions. Monday 21st and Tuesday 22nd for the big wave crew. After that, you’re on the beach.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Mon afternoon, min 10°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Fri night, min 9°C on Wed night). Winds increasing (light winds from the NNW on Thu night, fresh winds from the NNW by Sat morning). | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | S 16 | SSW 15 | SSW 14 | SSW 12 | SSW 16 | SSW 14 | SSW 14 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 18 | S 16 | S 15 | SSW 13 | SSW 13 | S 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 503 | 355 | 261 | 297 | 1042 | 2550 | 3196 | 2881 | 3221 | 3307 | 2512 | 1427 | 1048 | 804 | 1373 | 853 | 422 | 187 | 273 | 253 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 5:04PM1.15m | 5:26AM1.43m | 5:24PM1.09m | 5:49AM1.51m | 5:43PM1.02m | 6:15AM1.54m | 6:02PM0.93m | 6:42AM1.51m | 6:17PM0.83m | 7:10AM1.45m | 6:24PM0.73m | 7:40AM1.35m | 5:48PM0.64m | |||||||
Low Tide | 10:58PM0.28m | 11:42AM0.35m | 11:11PM0.25m | 12:12PM0.36m | 11:27PM0.22m | 12:43PM0.39m | 11:44PM0.21m | 1:17PM0.44m | 11:58PM0.23m | 1:55PM0.51m | 00:07AM0.27m | 2:47PM0.58m | 00:03AM0.32m | |||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — |
 | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 13 | 16 | 17 | 14 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 12 | 12 | 17 | 18 | 19 | 19 | 20 | 19 |
Feels °C | 11 | 11 | 13 | 13 | 10 | 4 | 5 | 4 | 6 | 5 | 6 | 7 | 8 | 10 | 11 | 13 | 15 | 12 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | S 16 | SSW 15 | SSW 14 | SSW 12 | SSW 16 | SSW 14 | SSW 14 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 18 | S 16 | S 15 | SSW 13 | SSW 13 | S 14 |
| kJ | 503 | 355 | 261 | 297 | 232 | 2550 | 3196 | 2881 | 3221 | 3307 | 2512 | 1427 | 1048 | 804 | 1373 | 853 | 422 | 187 | 273 | 253 |
Swell 2 Height (m) Direction Period (s) | N 4 | — | SSW 19 | SSW 18 | — | — | — | — | — | — | — | — | — | S 21 | — | — | WSW 7 | S 20 | SSW 17 | SSW 18 |
| kJ | 1 | — | 73 | 106 | — | — | — | — | — | — | — | — | — | 218 | — | — | 15 | 8 | 92 | 106 |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 20 | SSW 17 | — |
| kJ | — | — | — | 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | 38 | 172 | — |
Wind waves Height (m) Direction Period (s) | WSW 3 | WSW 5 | SW 5 | SW 6 | SSW 16 | SSW 15 | S 14 | — | — | — | — | — | — | — | N 4 | N 4 | N 4 | N 5 | NW 5 | WSW 7 |
| kJ | 10 | 9 | 21 | 33 | 1042 | 2157 | 2441 | — | — | — | — | — | — | — | 9 | 15 | 9 | 126 | 44 | 156 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 272 | 54 | 439 | 87 | 118 | 57 | 118 | 57 | 107 | 107 | 57 | 54 | 59 | 54 | 59 | 59 | 54 | 83 | 89 | 625 |
Best forecast wave conditions in Kangaroo Island | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Pennington Bay Surf forecast
The above surf forecast table for Pennington Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Pennington Bay can be found by selecting the local surf guide option on the grey menu. Our Pennington Bay 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 (Pennington Bay) 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 Pennington Bay 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 Pennington Bay, camping, hotels and holiday cottages in Kangaroo Island, consider staying in Kingscote which is 25 km (16 miles) away. Alternatively, find information about places to stay and car hire in Rapid Bay which is 54 km (34 miles) away
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