
Surf Forecasts:
Cyrils and Big Left surf forecast from 8 Sep 2026:
- Best quality surf: Friday 11 Sep, 10PM (local time) - 7.5ft (2.3m), 16s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 9 Sep, 1PM (local time) - 11ft (3.5m), 19s period, SW swell with 8,956 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 7AM (local time) - 7ft (2.1m), 15s period with SW swell.
Best Forecast Surf Conditions for Cyrils and Big Left this week:
The surf forecast for Cyrils and Big Left over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 7AM. The primary swell is predicted to be 2.1m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cyrils and Big Left in the next 16 days are 3.5m 19s and forecast to arrive on Wednesday (Sep 09) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 13) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 11th Sep) | 7ft (2.1m) 15s |
| Best Surf | 10PM (Fri 11th Sep) | 7.5ft (2.3m) 16s |
| Most Powerful | 1PM (Wed 9th Sep) | 11ft (3.5m) 19s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about the waves coming our way.
The outlook is a bit of a mixed bag, but there's some real magic lined up if you're patient. The big story is a solid, long-period groundswell from the southwest that hangs around for a while, but the wind is going to be the deciding factor on whether it's a dream or a drama.
We've got a tricky start. The first few days are a write-off. Tuesday the 8th sees a clean 4ft to 5ft swell from the southwest, but the wind is all wrong, making it messy. By Wednesday the 9th and Thursday the 10th, the swell jumps up to a hefty 10ft to 12ft, but it's accompanied by brutal cross-onshore winds. That's a no-go for paddling; honestly, that setup looks like it's more for the kite surfers than us. The combined wave energy is massive, hitting 6975 and then a whopping 13501, but it's all wind chop.
The tide starts to turn on Friday the 11th. The swell drops to a more manageable 7ft from the southwest, but the wind is still not cooperating. It's just not clean enough to get excited about.
Then we get to the highlight. Saturday the 12th is the day to circle on the calendar. We've got a 7ft southwest groundswell, with a very long 16-second period, and the wind is going light offshore from the NNW in the morning, turning glassy in the afternoon. This is going to be top-shelf at Cyrils and Big Left. The water is sitting at 56°, which is about average for this time of year, so you won't need the thickest rubber. The wave energy is a solid 2525, showing there's plenty of push. This is a reef break, and with that long period, the sets will be proper, with nice gaps to paddle out. It's an intermediate spot, but at 7ft, it’s getting a bit big for beginners, so the experienced crew will have a ball. Just keep in mind that crowds are possible here.
Sunday the 13th still offers some fun with fresh offshore winds, but the swell is backing off to 5ft to 5ft.
The middle of the week from Monday the 14th to Wednesday the 16th is pretty average, with the swell hanging around 3ft to 8ft, but the wind is inconsistent and usually cross-shore or cross-on. Not worth the paddle.
The second week holds some promise. On Thursday the 17th and Friday the 18th, we get another window of clean, offshore winds from the NNW, with a 5ft to 6ft SW swell. It’s not the size of the weekend, but it’ll be clean and fun. Saturday the 19th looks even better, with a 6ft swell and moderate offshore winds, which is a solid option.
Looking further ahead, Monday the 22nd of September is another standout for the experts. The swell is back up to 6ft, but the wind is light offshore from the NNW, promising clean, long-period waves. And then Wednesday the 23rd of September sees the swell build again to 7ft with a very long 17-second period, but the wind is howling offshore at 28 mph in the morning. That makes for beautiful, clean waves, but it’ll be a battle to get out and hold your position. That’s one for the strong paddlers only.
So, to wrap it up: if you can only get wet once, make it Saturday the 12th. That’s the clear winner. For a second option, keep an eye on Saturday the 19th or Monday the 22nd, which are promising but a bit less certain this far out.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue night. Very mild (max 12°C on Tue night, min 9°C on Tue morning). Winds decreasing (strong winds from the SSW on Tue night, calm by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sun afternoon, min 10°C on Fri morning). Winds increasing (calm on Fri night, strong winds from the N by Sun night). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 18 | SW 17 | SW 16 | SW 16 | SW 18 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 7 |
Wave Graph | |||||||||||||||||||||
901 | 1172 | 1929 | 4569 | 8082 | 8131 | 5408 | 4016 | 2653 | 1736 | 1933 | 2865 | 2266 | 1715 | 1480 | 1105 | 891 | 543 | 471 | 295 | 363 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-off | off | glassy | off | off | off | off | cross-off | cross | cross |
High Tide | 7:15PM1.77m | 9:05AM1.76m | 8:39PM1.69m | 10:21AM1.77m | 10:13PM1.70m | 11:25AM1.83m | 11:35PM1.80m | 12:18PM1.90m | 00:41AM1.92m | 1:03PM1.96m | 1:34AM2.03m | 1:42PM2.01m | 2:20AM2.11m | ||||||||
Low Tide | 1:33PM0.96m | 2:08AM0.36m | 2:56PM0.97m | 3:28AM0.44m | 4:22PM0.88m | 4:47AM0.48m | 5:34PM0.71m | 5:56AM0.48m | 6:30PM0.53m | 6:53AM0.46m | 7:17PM0.36m | 7:41AM0.46m | 7:58PM0.23m | ||||||||
6:31 | — | — | 6:31 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 11 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 12 | 12 | 16 | 19 | 17 | 19 | 21 | 18 | 18 | 16 | 13 |
Feels °C | 7 | 5 | 5 | 2 | 3 | 4 | 6 | 6 | 8 | 9 | 9 | 10 | 14 | 17 | 14 | 13 | 15 | 12 | 14 | 8 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 17 | SW 16 | SW 20 | SW 18 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 18 |
721 | 1172 | 1929 | 1860 | 8082 | 8131 | 5408 | 4016 | 2653 | 1736 | 1933 | 2865 | 2266 | 1715 | 1480 | 1105 | 891 | 543 | 471 | 295 | 79 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 13 | SW 26 | SSW 16 | — | SSW 19 | SSW 17 | SSW 16 | SSW 14 | — | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 17 | SSW 15 | SSW 15 | SSW 15 | — | WSW 6 | S 18 |
901 | 581 | 26 | 226 | — | 1133 | 650 | 424 | 226 | — | 265 | 519 | 259 | 130 | 164 | 93 | 22 | 42 | — | 23 | 6 | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | — | SW 26 | SSW 20 | — | — | — | — | — | — | S 18 | — | — | — | — | — | — | — | — | SW 19 | — |
62 | — | 26 | 320 | — | — | — | — | — | — | 167 | — | — | — | — | — | — | — | — | 15 | — | |
Wind waves Height (m) Direction Period (s) | — | — | SW 6 | SW 16 | SW 18 | SW 18 | — | — | — | — | — | — | — | — | NW 3 | N 3 | N 4 | NNW 4 | WNW 3 | — | SW 7 |
— | — | 162 | 4569 | 5419 | 5181 | — | — | — | — | — | — | — | — | 2 | 8 | 9 | 16 | 4 | — | 363 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 13 | 58 | 581 | 1494 | 62 | 10 | 10 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 34 | 34 | 50 | 8 | 59 | 62 |
Best forecast wave conditions in Mornington Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Cyrils and Big Left Surf forecast
The above surf forecast table for Cyrils and Big Left provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cyrils and Big Left can be found by selecting the local surf guide option on the grey menu. Our Cyrils and Big Left 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 (Cyrils and Big Left) 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 Cyrils and Big Left 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.
Cyrils and Big Left is 30 km (19 miles) from Mornington. If you plan a holiday in Mornington Peninsula, look for hotels and other accommodation in Mornington. Mornington has rooms for a wide range of budgets as well as car hire and transport links.










