
Surf Forecasts:
Cobblestones surf forecast from 16 Sep 2026:
- Best quality surf: Saturday 19 Sep, 8AM (local time) - 21ft (6.5m), 14s period, W swell with cross-onshore winds.
- Most powerful swell: Saturday 19 Sep, 8AM (local time) - 21ft (6.5m), 14s period, W swell with 15,747 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 2PM (local time) - 6ft (1.8m), 13s period with SW swell.
Best Forecast Surf Conditions for Cobblestones this week:
The surf forecast for Cobblestones over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 16) at 2PM. The primary swell is predicted to be 1.8m and 13s period with a secondary swell of 1.0m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 6.5m 14s and forecast to arrive on Saturday (Sep 19) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 9s period and expected on Friday (Sep 18) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Wed 16th Sep) | 6ft (1.8m) 13s |
| Best Surf | 8AM (Sat 19th Sep) | 21ft (6.5m) 14s |
| Most Powerful | 8AM (Sat 19th Sep) | 21ft (6.5m) 14s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks. We’ve got a lot of ocean energy coming, but it ain’t all gonna be pretty. There’s a big gap, and then we score some gems, so listen up.
Right off the bat, from the 16th through the 18th, we’ve got waves in the 5ft to 7ft range at Cobblestones, coming from the SW with a solid 13 to 17-second period. The energy is moderate, with the combined energy sitting between 989 and 2820. Early on, a cross-offshore breeze is keeping things clean, but by Friday afternoon the wind swings and messes it up. We’re looking at a bit of a hit-and-miss run here, with the swell dropping and the wind not being our friend.
Then the ocean just turns it on for a few days. The 19th and 20th see a massive spike in size, but it's unsurfable for us. On Saturday the 19th, we’ve got a serious 20ft of SW swell, but it's getting smashed by strong cross-onshore winds, so it’s a total write-off. The energy is very strong, reading 12049, but it's just howling. Same story for Sunday the 20th; it's smaller, but still big and lumpy with a heavy cross breeze. This is where we just watch and wait.
Come Monday the 21st of September, things start to settle into a nice rhythm. The SW swell is still a solid 11ft with a 15-second period, but the wind goes light and glassy in the afternoon. The energy is strong (5476 in the morning and 4462 in the afternoon), and it's looking clean. This is when you want to be in the water. The crowd is always a factor at Cobblestones, so expect some company, but for the experienced crew, this is a standout.
We get a run of onshore winds and rubbish surf from the 22nd through the 25th, with wave heights around 8ft to 15ft but generally choppy and blown-out. It's a bit of a write-off, but the energy is still pumping in, clocking in at over 12,000 on the 25th, but again, it's just too messy.
Now, for the real standout. Mark your calendars for the 30th of September. Wednesday morning has a 13ft SW swell with a 16-second period, and while the wind is a light cross-on, the energy is a huge 8364. But the real gem is the morning of Thursday, the 1st of October. The swell is a clean 10ft from the SW, a 16-second period, and the combined energy is a very strong 4586. The wind is glassy and light from the NNE. This looks absolutely perfect for Cobblestones. It might be a Tuesday or a Wednesday, but if you can sneak out, this is the pick of the entire forecast. As a reef break, this long-period SW groundswell (15-16s) will wrap in nicely, giving some great shaped walls. It's going to be bigger, and for beginners, anything over 8ft is a no-go, and this is definitely over that, so this is strictly for the experienced surfer.
Outside of that standout, the last few days on the 29th and 30th are a mix of onshore winds and big surf, so I’d pick your sessions carefully. The water is about 64°F, which is around average for this time of year.
So there you have it. A rough start, a messy hump, but a very, very promising first of the month. Get your good board ready and be ready to pounce.
Catch you in the water.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Fri afternoon. Warm (max 24°C on Wed afternoon, min 13°C on Fri night). Winds increasing (light winds from the N on Wed afternoon, near gales from the W by Fri night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat morning. Very mild (max 17°C on Mon afternoon, min 12°C on Sun night). Winds decreasing (near gales from the W on Sat morning, calm by Mon afternoon). | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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) | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | SW 17 | WSW 16 | WNW 11 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
1584 | 865 | 1072 | 1079 | 796 | 636 | 1467 | 1975 | 6514 | 12049 | 6395 | 3488 | 2024 | 5048 | 6979 | 5476 | 4462 | 3009 | 2506 | 2756 | 2880 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-on | cross-on | on | on | cross | cross | off | cross | glassy | cross-on | on | cross-on | cross-off |
High Tide | 11:28PM0.79m | 11:55PM0.81m | 00:25AM0.81m | 1:03AM0.80m | 2:38AM0.77m | 6:05AM0.76m | |||||||||||||||
Low Tide | 2:02PM0.31m | 2:13PM0.28m | 2:26PM0.27m | 2:39PM0.27m | 2:51PM0.28m | 3:03PM0.28m | 3:14PM0.30m | ||||||||||||||
6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | |
— | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | — | 1 | — | — | — | — | 2 | 6 | 2 | — | 1 | — | — | — | — | — | 1 | 1 | — | — |
Temp °C | 21 | 24 | 21 | 20 | 19 | 17 | 20 | 20 | 16 | 16 | 16 | 16 | 16 | 16 | 14 | 16 | 17 | 17 | 16 | 16 | 15 |
Feels °C | 19 | 24 | 20 | 18 | 17 | 15 | 14 | 14 | 7 | 7 | 9 | 11 | 14 | 13 | 11 | 15 | 16 | 15 | 12 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | SW 17 | W 10 | WSW 16 | — | WSW 14 | WSW 13 | WSW 12 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 |
1584 | 865 | 1072 | 1079 | 796 | 636 | 1467 | 708 | 2791 | — | 1889 | 3488 | 2024 | 5048 | 6979 | 5476 | 4462 | 3009 | 2506 | 2756 | 2880 | |
Swell 2 Height (m) Direction Period (s) | S 13 | SW 16 | S 11 | S 11 | SW 18 | SW 16 | W 12 | WSW 16 | — | — | — | — | SW 16 | — | — | — | — | — | — | — | — |
350 | 367 | 121 | 58 | 161 | 502 | 404 | 1975 | — | — | — | — | 211 | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | ESE 7 | SW 22 | WSW 21 | E 8 | S 11 | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — |
32 | 18 | 42 | 5 | 20 | — | — | 137 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 4 | NNW 5 | NNW 6 | NNW 7 | WNW 11 | WSW 13 | WSW 13 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 12 | 27 | 167 | 610 | 6514 | 12049 | 6395 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 0 | 44 | 53 | 53 | 53 | 143 | 159 | 474 | 1340 | 1900 | 2 | 1 | 31 | 0 | 16 | 0 | 44 | 569 | 2 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Cobblestones Surf forecast
The above surf forecast table for Cobblestones provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cobblestones can be found by selecting the local surf guide option on the grey menu. Our Cobblestones 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 (Cobblestones) 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 Cobblestones 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.
Cobblestones is 85 km (53 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.










