Surf Forecasts:
Cobblestones surf forecast from 16 Sep 2026:
- Best quality surf: Saturday 19 Sep, 11AM (local time) - 25ft (7.5m), 14s period, W swell with cross-onshore winds.
- Most powerful swell: Saturday 19 Sep, 11AM (local time) - 25ft (7.5m), 14s period, W swell with 22,820 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 11PM (local time) - 5ft (1.5m), 15s period with WSW 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 11PM. The primary swell is predicted to be 1.5m and 15s period with a secondary swell of 0.8m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 7.5m 14s and forecast to arrive on Saturday (Sep 19) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 9s period and expected on Saturday (Sep 19) at 2AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 16th Sep) | 5ft (1.5m) 15s |
| Best Surf | 11AM (Sat 19th Sep) | 25ft (7.5m) 14s |
| Most Powerful | 11AM (Sat 19th Sep) | 25ft (7.5m) 14s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, let’s talk surf. The 16-day forecast starts Wednesday September 16, and the first rideable waves are small and not much to write home about. There’s a gap of a few days early on where you’re better off staying dry.
Cobblestones shows 1.6m SW swell on Wednesday afternoon, period 13 seconds, with a light NW breeze at 5 km/h coming cross-off. Water temp is around 64°F, about normal. The energy’s moderate at 1250, but conditions are only so-so.
Thursday morning shapes up a bit better: 1.6m from the WSW, 14-second period, and a moderate N wind at 15 km/h cross-off keeps it clean. Energy’s still moderate at 1029. By afternoon, it fades – wind shifts cross-shore, and the waves get weaker.
Friday morning brings a 1.7m WSW groundswell with a 17-second period – long period, which Cobblestones as a reef will love. Energy jumps to 2030, and a fresh NNE wind at 19 km/h cross-off keeps it tidy. Good for advanced surfers, but not the top pick.
Saturday September 19 gets huge: 7.5m W swell with a 14-second period and a near-gale W wind at 34 km/h – cross-on and blown out. Energy is a massive 22820, but it’s too big – only for experts, and even then it’s messy.
Now the standout: Friday September 25. A 4.5m SW swell with a 19-second period – that’s very long period groundswell. Energy hits 15263, strong. The wind is cross from the SSE at 19 km/h, making it lumpy but rideable for experts. Saturday September 26 morning is the real gem: 3.5m SW swell, 16-second period, cross-off ESE breeze at 9 km/h, clean, with energy at 5540. That’s exceptional for advanced to expert surfers – the reef will turn those long-period swells into beautiful, powerful waves.
Further out, Wednesday September 30 morning looks glassy – N wind at 3 km/h, 3.5m SW swell, 15-second period, energy at 5896. Another exceptional expert session, but it’s over a week out, so keep an eye on it.
From the 19th through the 24th, there are gaps of poor conditions – too big, too windy, or just flat. The run from the 25th into the 26th is your best bet.
Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Sat morning. Warm (max 22°C on Wed afternoon, min 15°C on Thu night). Winds increasing (light winds from the NW on Wed afternoon, near gales from the NW by Fri night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Very mild (max 17°C on Mon afternoon, min 13°C on Sun night). Winds decreasing (strong winds from the W on Sat afternoon, light winds from the E by Sun night). | |||||||||||||||||||
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 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | WSW 16 | WSW 16 | W 14 | W 13 | WSW 13 | WSW 12 | SW 16 | SW 15 | SW 15 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 865 | 1072 | 971 | 796 | 636 | 1626 | 1951 | 2887 | 22820 | 8808 | 3752 | 1783 | 4490 | 6134 | 5404 | 4584 | 3108 | 3280 | 4189 | 3724 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-on | on | on | cross-on | cross-on | cross-off | cross | cross-on | 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 | |||||||||||||
 |  | | |  | |  |  |  | | |  | | | | |  | | | | |
 | — | — | 6:16 | — | — | 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 | — | — | — | — | — | — | — | 4 | 5 | — | — | — | — | — | — | — | 3 | — | — | — |
Temp °C | 22 | 21 | 20 | 19 | 17 | 19 | 20 | 17 | 15 | 16 | 16 | 16 | 16 | 14 | 16 | 17 | 16 | 15 | 15 | 15 |
Feels °C | 21 | 21 | 18 | 17 | 15 | 15 | 15 | 13 | 5 | 9 | 10 | 13 | 12 | 12 | 13 | 14 | 13 | 9 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | WSW 16 | WSW 16 | — | W 13 | WSW 13 | WSW 12 | SW 16 | SW 15 | SW 15 | SW 15 | WSW 14 | SW 14 | SW 14 | SW 13 |
| kJ | 865 | 1072 | 971 | 796 | 636 | 1626 | 1951 | 2887 | — | 8808 | 3752 | 1783 | 4490 | 6134 | 5404 | 4584 | 3108 | 3280 | 4189 | 3724 |
Swell 2 Height (m) Direction Period (s) | SW 16 | S 11 | S 11 | SW 18 | SW 16 | W 12 | W 12 | — | — | — | — | SW 16 | — | — | — | — | — | — | — | — |
| kJ | 367 | 121 | 58 | 161 | 502 | 404 | 342 | — | — | — | — | 483 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 22 | WSW 21 | E 8 | S 11 | — | — | W 14 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 18 | 42 | 5 | 35 | — | — | 66 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NNW 3 | NW 4 | N 5 | NNW 6 | NW 9 | W 14 | — | WSW 9 | — | — | — | — | WNW 5 | — | — | — | — |
| kJ | — | — | — | 8 | 19 | 63 | 165 | 2744 | 22820 | — | 254 | — | — | — | — | 66 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 7 | 53 | 53 | 0 | 44 | 143 | 220 | 630 | 1900 | 2 | 1 | 1 | 0 | 152 | 220 | 2 | 2 | 25 | 0 |
Best forecast wave conditions in Margaret River | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.
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