
Surf Forecasts:
Cobblestones surf forecast from 15 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11PM (local time) - 11ft (3.5m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 5AM (local time) - 13ft (4.0m), 15s period, WSW swell with 6,190 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 2AM (local time) - 8ft (2.5m), 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 Wednesday (Sep 16) at 2AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 1.0m and 7s. 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 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 3.0m 7s period and expected on Friday (Sep 18) at 5AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 16th Sep) | 8ft (2.5m) 14s |
| Best Surf | 11PM (Sun 20th Sep) | 11ft (3.5m) 15s |
| Most Powerful | 5AM (Sat 19th Sep) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Cobblestones over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking at Cobblestones for the next couple of weeks. We’ve got some serious action lined up, but you’re gonna have to be patient and pick your windows carefully because the wind is gonna be the main character here for a while.
We kick off with a pulse of swell on Tuesday the 15th, with a solid 9.8ft SW swell rolling in, carrying a massive 3468 (moderate to strong energy) punch. The only problem? A light cross breeze from the SSE isn’t doing us any favours, making it a bit lumpy. This is an advanced reef break, so you’ll need your wits about you as the water temp is 64°, running about average for this time of year. The sets will be long, and the power will be there, but the surface won’t be as clean as we’d like.
Wednesday the 16th is where the quality starts to flip. Morning brings a drop to 6.6ft from the SW, but the wind swings NE, cross-offshore at 12 mph, and the face cleans right up. That afternoon is the pick of the early week: 5.2ft SW swell, light N wind at 6 mph, cross-off and the water is glassy. That’s excellent surf for the experienced crew. The period is a solid 13 seconds, giving it proper groundswell punch.
Thursday the 17th is a bit of a battle. A 5.6ft WSW swell is still there in the morning, and the wind is cross-off from the N at 16 mph, keeping it clean, but the energy is starting to drop slightly (1198). The afternoon gets messy with a fresh NNW breeze at 19 mph, starting to chop things up, so the window is the morning really.
Friday the 18th, just let it slide. We get a 5.6ft swell from the WSW, but the wind cranks to 25 mph from the N in the morning, turning into 28 mph from the NNW in the afternoon. The ocean is going to be a washing machine, with heavy cross-chop. That one’s a pass.
Saturday the 19th is a no-go too, with 9.8ft to 11.5ft of WSW swell under a strong W cross-onshore wind at 19 mph. That sort of size with that wind direction is just a messy, lumpy beast. Not for paddling.
Sunday the 20th offers a slight reprieve. The swell backs down to 7.9ft in the morning and 8.2ft in the afternoon from the WSW and SW, and the wind goes light cross-onshore. It’s still a bit bumpy, but the energy is there (3486 in the arvo). If you’re desperate, it’s surfable, but not a standout.
Now, lean in, because Monday the 21st morning has the makings of a proper session. An 11.5ft SW swell hits with a period of 15 seconds, generating a massive 5025 (strong energy). The wind is light from the NNW, just a gentle cross-shore. The surface will have a slight cross-chop, but the power and size are undeniable. This is an advanced reef, so you’ll need to be on your game. This is the biggest, most powerful swell of the early run, and it’s got serious grunt.
The middle of the week (Tuesday 22nd to Wednesday 23rd) goes downhill again, with the wind turning onshore and the swell dropping to 7.9ft to 8.2ft. The sea surface gets fairly choppy. Not the best time.
Thursday the 24th morning brings a 9.8ft SW swell with a moderate cross-shore from the NNW, but the afternoon turns nasty with a 13.1ft swell and heavy onshore winds. Then Friday the 25th is a complete wipeout with 16.4ft SW swell and screaming onshore winds. That’s pure chaos, only for the madmen or the kite surfers.
The light at the end of the tunnel comes on Saturday the 26th. The swell drops back to a still-chunky 11.5ft from the SW in the morning, and the wind goes light from the SSE, cross-shore. It’s the cleanest we’ve seen in days, and the combined energy is still a hefty 6730. This is a solid, powerful groundswell with a 16-second period, and the surface is just gentle cross-shore chop. This is your second standout window.
Then, hold on for Sunday the 27th morning. The swell drops to a more manageable 6.9ft from the SW, but the magic is in the wind — a light offshore from the ENE at 9 mph. The face will be glassy and clean. That is the best quality wave of the whole run for experienced surfers, with excellent conditions. The period is at 14 seconds, so it’s still a proper groundswell, but the
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 24°C on Wed afternoon, min 17°C on Tue night). Winds increasing (light winds from the N on Wed afternoon, strong winds from the N by Fri morning). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Fri afternoon. Very mild (max 17°C on Fri afternoon, min 13°C on Fri night). Winds decreasing (near gales from the N on Fri afternoon, light winds from the ENE by Sun night). | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 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 | SW 15 | SW 15 | SW 14 |
Wave Graph | ||||||||||||||||||||
3468 | 2526 | 1380 | 865 | 961 | 1079 | 808 | 598 | 1626 | 2162 | 5584 | 4892 | 3785 | 2177 | 1587 | 3486 | 5964 | 5025 | 4235 | 3372 | |
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-off | cross | cross-off | cross-off | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-off | cross | cross-on | on |
High Tide | 11:04PM0.76m | 11:28PM0.79m | 11:55PM0.81m | 00:25AM0.81m | 1:03AM0.80m | 2:38AM0.77m | ||||||||||||||
Low Tide | 2:06PM0.35m | 2:02PM0.31m | 2:13PM0.28m | 2:26PM0.27m | 2:39PM0.27m | 2:51PM0.28m | 3:03PM0.28m | |||||||||||||
— | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | |
6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | |
mm | — | — | — | — | — | — | — | — | 1 | 2 | 4 | — | 1 | 2 | — | — | — | — | — | — |
Temp °C | 20 | 19 | 21 | 24 | 22 | 20 | 19 | 17 | 19 | 17 | 15 | 15 | 16 | 16 | 16 | 16 | 15 | 17 | 17 | 16 |
Feels °C | 18 | 16 | 18 | 23 | 22 | 18 | 16 | 13 | 13 | 6 | 5 | 7 | 11 | 11 | 14 | 14 | 12 | 15 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | NW 9 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 |
3468 | 2526 | 1380 | 865 | 961 | 1079 | 808 | 598 | 1626 | 705 | 5584 | 4892 | 3785 | 2177 | 1587 | 3486 | 5964 | 5025 | 4235 | 3372 | |
Swell 2 Height (m) Direction Period (s) | — | SE 7 | S 13 | SW 16 | S 11 | S 11 | SW 18 | WSW 16 | N 8 | WSW 16 | NW 10 | — | SSE 6 | — | — | — | — | — | — | — |
— | 105 | 350 | 367 | 121 | 58 | 162 | 447 | 191 | 2162 | 204 | — | 4 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 7 | SW 22 | WSW 21 | SW 20 | S 11 | S 10 | WNW 9 | WSW 12 | S 7 | — | — | — | — | — | — | — | — | — |
— | — | 36 | 18 | 42 | 61 | 20 | 8 | 227 | 49 | 88 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 4 | — | NE 4 | — | NNE 5 | E 8 | NW 5 | NNW 6 | W 10 | SW 8 | — | — | — | — | — | — | — | — | — | — |
13 | — | 5 | — | 4 | 10 | 62 | 386 | 786 | 1136 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 16 | 0 | 0 | 53 | 251 | 143 | 53 | 411 | 753 | 1340 | 359 | 254 | 2 | 1 | 0 | 16 | 1 | 2 |
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.










