Surf Forecasts:
Pennington Bay surf forecast from 10 Sep 2026:
- Best quality surf: Friday 11 Sep, 12PM (local time) - 7ft (2.2m), 16s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 9AM (local time) - 8ft (2.5m), 16s period, S swell with 3,371 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 12PM (local time) - 7ft (2.2m), 16s 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 Friday (Sep 11) at 12PM. The primary swell is predicted to be 2.2m and 16s 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 2.5m 16s and forecast to arrive on Wednesday (Sep 16) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 13) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 11th Sep) | 7ft (2.2m) 16s |
| Best Surf | 12PM (Fri 11th Sep) | 7ft (2.2m) 16s |
| Most Powerful | 9AM (Wed 16th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Pennington Bay over the next 16 days.
The Lowdown
Alright, Rusty here, let's have a look at what's coming down the pipe for Pennington Bay.
We've got a solid run of swell on the way, but it's not all clean cut. The water temp is sitting at 59°, which is about average for this time of year, so no surprises there.
Things kick off on Thursday, September 10th. We've got a big 10ft south groundswell with a very long 16-second period, packing a serious punch – that's strong wave energy (4221). The wind's a cross-offshore, but it's a moderate breeze, so there'll be some texture. This is right on the edge for beginners; over 8ft is big stuff. The real standout appears on Friday afternoon, September 11th. The swell drops a touch to 7ft, still from the south with a long 15-second period, and the wind goes light and cross-offshore, making for some clean, lined-up waves. The energy is still strong (2465). That afternoon window is your best bet for the first week.
Saturday morning, September 12th, sees a clean 6ft south swell with offshore winds, but the energy drops into the moderate range (1327). Sunday the 13th is a write-off with onshore winds chopping up the 4ft swell. The start of the next week stays grim with poor conditions and onshore winds, even with a bit of a bump in swell on Tuesday, the 15th, with 8ft but onshore wind making it a mess.
Now, for the long-range promise. The real highlight is Tuesday, September 22nd. We're looking at a 7ft south groundswell with a long 16-second period, and the energy is very strong again (4235). The wind is a moderate offshore breeze from the north, so it will be clean and powerful. This is the one to circle on your calendar. The next day, Wednesday the 23rd, the swell jumps back to 10ft but with a cross-shore wind, making it a messy, powerful wall for experts only.
Then, Thursday, September 24th, is another cracker. A 8ft south swell with a 15-second period, light offshore winds, and massive wave energy (4409). It'll be clean, powerful, and perfect for anyone who knows what they're doing. Just be aware, a spot like Pennington Bay can draw a crowd when it's good, so get there early.
Expect some gaps of poor conditions between these standout days, but that Tuesday the 22nd and Thursday the 24th are the real gems.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Sat night, min 10°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sun morning, min 9°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
AM | 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 | S 16 | S 15 | S 15 | S 16 | S 16 | S 15 | S 16 | S 15 | S 16 | S 16 | SSW 15 | SSW 14 | SW 12 | SSW 13 | S 15 | S 15 | S 15 | S 16 | S 15 | S 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4221 | 3230 | 2023 | 2079 | 2465 | 2038 | 1327 | 1107 | 636 | 627 | 509 | 360 | 265 | 798 | 594 | 2717 | 2278 | 2249 | 3371 | 2925 | 1759 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross-off | cross-off | glassy |
High Tide | 3:56PM1.23m | 4:53AM1.02m | 4:22PM1.23m | 4:55AM1.16m | 4:44PM1.20m | 5:08AM1.31m | 5:04PM1.15m | 5:26AM1.43m | 5:24PM1.09m | 5:49AM1.51m | 5:43PM1.02m | 6:15AM1.54m | 6:02PM0.93m | ||||||||
Low Tide | 9:41AM0.64m | 10:36PM0.31m | 10:12AM0.52m | 10:40PM0.33m | 10:42AM0.43m | 10:47PM0.31m | 11:12AM0.37m | 10:58PM0.28m | 11:42AM0.35m | 11:11PM0.25m | 12:12PM0.36m | 11:27PM0.22m | 12:43PM0.39m | 11:44PM0.21m | |||||||
 | |  | | |  | |  | | | | | | | | | | | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — |
 | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 11 | 12 | 14 | 15 | 16 | 16 | 19 | 20 | 18 | 17 | 13 | 17 | 17 | 13 | 12 | 11 | 11 | 11 | 12 | 12 |
Feels °C | 6 | 7 | 9 | 11 | 12 | 14 | 12 | 16 | 16 | 16 | 13 | 11 | 14 | 12 | 9 | 8 | 6 | 7 | 8 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 15 | S 15 | S 16 | S 16 | S 15 | S 16 | S 15 | S 16 | S 16 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | S 15 | S 15 | S 15 | S 16 | S 15 | S 15 |
| kJ | 4221 | 3230 | 2023 | 2079 | 2465 | 2038 | 1327 | 1107 | 636 | 627 | 509 | 360 | 265 | 312 | 594 | 2717 | 2278 | 2249 | 3371 | 2925 | 1759 |
Swell 2 Height (m) Direction Period (s) | — | S 26 | — | — | — | — | — | — | S 18 | — | NNW 4 | S 21 | SW 5 | SSW 18 | S 16 | — | — | — | — | — | — |
| kJ | — | 13 | — | — | — | — | — | — | 169 | — | 3 | 9 | 7 | 106 | 503 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 5 | — | S 19 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 2 | — | 66 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NNE 3 | N 4 | WSW 4 | SW 3 | — | SW 12 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 5 | 16 | 5 | 1 | — | 798 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 305 | 107 | 57 | 71 | 92 | 71 | 54 | 54 | 54 | 96 | 544 | 54 | 89 | 59 | 57 | 57 | 107 | 57 | 90 | 104 | 71 |
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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