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: Monday 14 Sep, 2PM (local time) - 13ft (4.0m), 14s period, SW swell with 5,650 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 4.0m 14s and forecast to arrive on Monday (Sep 14) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s 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 | 2PM (Mon 14th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, let’s take a look at what Cobblestones has in store for us.
The first couple of days are the ones to circle. Monday, the 14th of September, we’ve got some serious juice coming in. A SSW swell at 12 ft, with a 14-second period, and the wind is a light cross-off from the SE at 9 mph. That’s a recipe for clean, well-lined-up waves. The water is sitting at 65°, which is a bit warmer than normal for this time of year. The combined energy is at 5483 – solid. That Monday morning session is the pick of the bunch, a real standout. Monday afternoon the breeze freshens a bit, but it’s still okay.
Tuesday the 15th is also a good bet. The swell drops slightly to 10 ft from the SW, still 14 seconds, and we’ve got an offshore wind from the East at 9 mph. That’s a beautiful setup, with energy at 4235. Tuesday afternoon the wind gets a bit more cross-shore, but it’s still manageable.
From Wednesday the 16th, things start to go quiet. Swell drops to 7 ft Wednesday morning, and the wind is a cross-off, but the energy is only moderate. Then we hit a proper flat spell. Thursday the 17th and Friday the 18th are windy and messy. Friday afternoon on the 18th sees 10 ft but with a fresh cross-onshore, turning it into a lumpy mess. Saturday the 19th is no better. There’s a long stretch of poor to marginal surf from Wednesday the 16th all the way through to Monday the 28th of September. Sunday the 20th afternoon has a 10 ft swell with a 16-second period, but the wind is moderate cross-shore, so it’ll be bumpy.
Now, the real event is Friday the 25th of September. That morning we see 13 ft, and by the afternoon it’s an absolute monster: 18 ft with a very long 19-second period. The energy is off the charts at 23993. This is a proper big-wave day for experts only. The wind is a gentle cross-onshore, but at that size, it’s all about commitment. The morning of Saturday the 26th looks cleaner with a cross-off wind and 15 ft swell, but still massive.
So, the takeaway is clear: get out there Monday the 14th and Tuesday the 15th for the best, most consistent waves. After that, there’s a long gap of poor conditions until that giant swell on the 25th – keep it on your radar, but it’s a long-range call. Cobblestones can get a crowd sometimes, so aim for those early weekday sessions.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 11°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Fri afternoon. Very mild (max 19°C on Thu morning, min 12°C on Fri morning). Winds decreasing (strong winds from the SSE on Fri morning, light winds from the WNW by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 14 | 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 15 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5472 | 5417 | 4912 | 4216 | 3810 | 2534 | 1584 | 865 | 947 | 971 | 808 | 1030 | 1336 | 4065 | 5316 | 4334 | 3257 | 2349 | 1744 | 4547 | 5258 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross | off | cross-off | cross | cross-off | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on |
High Tide | 10:57AM0.43m | 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 | |||||||||||||
 | |  | |  |  |  | | | | |  |  |  | | | |  | | | | |
 | 6:22 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | 8 | 1 | — | — | — | — | — | — |
Temp °C | 16 | 17 | 15 | 16 | 20 | 19 | 20 | 24 | 22 | 19 | 19 | 18 | 13 | 13 | 14 | 15 | 16 | 16 | 16 | 16 | 16 |
Feels °C | 14 | 14 | 11 | 14 | 18 | 16 | 18 | 24 | 19 | 18 | 16 | 15 | 5 | 6 | 8 | 11 | 11 | 11 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | SW 16 | SW 15 |
| kJ | 5472 | 5417 | 4912 | 4216 | 3810 | 2534 | 1584 | 865 | 947 | 971 | 808 | 1030 | 970 | 4065 | 5316 | 4334 | 3257 | 2349 | 1744 | 4547 | 5258 |
Swell 2 Height (m) Direction Period (s) | W 24 | — | — | ESE 5 | — | SE 7 | S 13 | SW 16 | S 11 | S 11 | SW 18 | WSW 16 | WSW 17 | N 7 | NNW 7 | — | — | — | SSW 17 | — | — |
| kJ | 11 | — | — | 19 | — | 8 | 345 | 367 | 123 | 61 | 161 | 447 | 1336 | 23 | 5 | — | — | — | 184 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 6 | SW 22 | WSW 21 | ESE 8 | S 11 | S 10 | NW 7 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 18 | 18 | 42 | 6 | 20 | 9 | 49 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SE 4 | — | — | — | N 4 | NNW 4 | NW 5 | NNW 6 | S 7 | S 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 17 | — | — | — | 15 | 10 | 54 | 266 | 219 | 160 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1 | 0 | 0 | 0 | 0 | 7 | 1 | 44 | 53 | 220 | 143 | 86 | 297 | 2 | 512 | 1797 | 2 | 53 | 53 | 201 |
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.
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