
Surf Forecasts:
Cobblestones surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 2AM (local time) - 11ft (3.5m), 14s period, SW swell with offshore winds.
- Most powerful swell: Saturday 19 Sep, 5AM (local time) - 11ft (3.5m), 15s period, WSW swell with 5,669 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 2AM (local time) - 11ft (3.5m), 14s 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 Tuesday (Sep 15) at 2AM. The primary swell is predicted to be 3.5m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cobblestones in the next 16 days are 3.5m 15s and forecast to arrive on Saturday (Sep 19) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Friday (Sep 18) at 2AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 15th Sep) | 11ft (3.5m) 14s |
| Best Surf | 2AM (Tue 15th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 5AM (Sat 19th Sep) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
G’day, Rusty here. Only Cobblestones is in the mix, and it’s a heavy reef for the advanced crew. Water temp is about 64°, pretty normal for the season.
Starting Monday the 14th, you’ve got a solid 13-foot SW groundswell (14 seconds) with SE wind at 16 mph cross-off, keeping it clean. Combined energy is 5602 – that’s a lot of power. Tuesday the 15th morning is cleaner: 10-foot SW swell (14 seconds), east wind at 6 mph offshore, glassy. Good for the experienced. Energy 4216. Tuesday afternoon gets a bit choppy, so hit it early.
Wednesday the 16th morning is 7-foot SW swell (13 seconds) with NE cross-off wind, clean enough. Energy 1865. That afternoon though – dead calm, NW wind at 0 mph, and 5-foot SW swell (13 seconds). Glassy, perfect, energy 1250. A quiet standout.
Thursday the 17th and Friday the 18th turn rough. Friday morning has a 10-foot WSW groundswell (17 seconds – very long period) with N wind at 19 mph cross-off, clean but big. Energy 5508. But the arvo brings a gale, onshore, and it’s blown out. Saturday the 19th through to the 22nd is mostly poor – onshore winds, rain, messy. Tuesday the 22nd arvo has a massive 13-foot WSW swell (14 seconds) with onshore wind, energy 12222, but it’s a no-go for surfing.
Then a gap of nasty days until Wednesday the 23rd morning: 16-foot WSW swell (13 seconds), cross-shore wind, energy 7542 – big and lumpy, experts only. The true standout is Saturday the 26th: 12-foot SW swell (16 seconds), energy 6451, and glassy with NE wind at 3 mph. That’s exceptional for experts. Sunday the 27th morning is also glassy with 8-foot SW swell (14 seconds), energy 2722, clean and fun. Monday the 28th morning has 8-foot SW swell (16 seconds) with cross-off NNE wind at 9 mph – another good window.
Cobblestones can get crowds sometimes, but with these sizes, the lineup should be for the dedicated crew. Best session: Saturday the 26th morning, hands down.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Fri morning. Very mild (max 19°C on Thu afternoon, min 13°C on Fri afternoon). Winds decreasing (gales from the SW on Fri afternoon, light winds from the WNW by Sun morning). | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | WSW 16 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 13 | SW 14 |
Wave Graph | ||||||||||||||||||||
5602 | 4691 | 4216 | 3619 | 2534 | 1380 | 865 | 961 | 957 | 808 | 715 | 4947 | 3381 | 4112 | 4574 | 3402 | 2310 | 1679 | 1828 | 4168 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | cross | off | cross-off | glassy | cross-off | cross | cross | cross-off | cross-off | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:43PM0.72m | 9:41AM0.38m | 11:04PM0.76m | 11:28PM0.79m | 11:55PM0.81m | 00:25AM0.81m | 1:03AM0.80m | 2:38AM0.77m | ||||||||||||
Low Tide | 2:41PM0.40m | 7:39AM0.38m | 2:06PM0.35m | 2:02PM0.31m | 2:13PM0.28m | 2:26PM0.27m | 2:39PM0.27m | 2:51PM0.28m | ||||||||||||
— | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 4 | 3 | 2 | — | — | 1 | — | 2 | 2 |
Temp °C | 17 | 15 | 17 | 20 | 18 | 20 | 23 | 23 | 19 | 19 | 18 | 16 | 16 | 14 | 15 | 16 | 16 | 17 | 17 | 17 |
Feels °C | 14 | 11 | 15 | 18 | 15 | 17 | 22 | 21 | 17 | 17 | 14 | 13 | 7 | 6 | 9 | 11 | 12 | 13 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | WSW 16 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 13 | SW 14 |
5602 | 4691 | 4216 | 3619 | 2534 | 1380 | 865 | 961 | 957 | 808 | 715 | 4947 | 3381 | 4112 | 4574 | 3402 | 2310 | 1679 | 1828 | 4168 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | S 13 | SW 16 | S 11 | S 11 | SW 18 | SW 16 | WSW 9 | W 12 | NW 8 | — | — | SE 7 | SE 6 | SW 16 | — |
— | — | — | — | — | 485 | 367 | 123 | 58 | 161 | 489 | 422 | 538 | 39 | — | — | 7 | 2 | 897 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 22 | WSW 21 | SE 8 | S 11 | S 10 | NW 7 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | 18 | 42 | 10 | 20 | 9 | 122 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 4 | — | ESE 6 | SE 4 | SE 7 | NE 4 | — | N 4 | N 4 | NW 5 | NNW 7 | S 6 | S 7 | SSW 7 | — | — | — | — | — | — |
16 | — | 20 | 14 | 65 | 8 | — | 14 | 9 | 60 | 412 | 139 | 408 | 316 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 0 | 0 | 16 | 0 | 28 | 53 | 201 | 159 | 53 | 143 | 1689 | 688 | 1900 | 201 | 251 | 201 | 172 |
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.










