Surf Forecasts:
Cyrils and Big Left surf forecast from 2 Sep 2026:
- Best quality surf: Friday 4 Sep, 10AM (local time) - 11ft (3.5m), 16s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 4PM (local time) - 11ft (3.5m), 19s period, SW swell with 7,496 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 10AM (local time) - 11ft (3.5m), 16s 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 04) at 10AM. The primary swell is predicted to be 3.5m and 16s period with a secondary swell of 0.8m and 16s. The wind is predicted to be offshore 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 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Thursday (Sep 03) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Fri 4th Sep) | 11ft (3.5m) 16s |
| Best Surf | 10AM (Fri 4th Sep) | 11ft (3.5m) 16s |
| Most Powerful | 4PM (Wed 9th Sep) | 11ft (3.5m) 19s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
G'day, Rusty here. Let's get into what's happening swell-wise. The main spot is a reef that can fire, but it's not for the faint-hearted. Water temp is around 56°, which is average for the season.
We start on Wednesday, 2nd September. There's a 6ft swell from the SW with a 16-second period, but a 15 mph cross-offshore wind is making it messy. The energy is strong (1744), but the conditions are only marginal.
The real standout is Friday, 4th September. The swell is a solid 11-12ft from the SW, with a 16-second period, and the wind goes clean offshore from the NNW. This is serious, heavy surf. The energy is massive (5414), and it's described as exceptional for experts only. The wind stays clean into the afternoon.
Saturday, 5th September is a total blowout. The wind hits near gale force, making it unsurfable despite the size.
Sunday, 6th September sees the swell drop to 8ft, but the wind is still cross-off, so it's average.
The next week has a few moments. Monday, 7th September is a write-off with cross-onshore wind. Tuesday, 8th September has a weird 18-second period swell, but it's lumpy. Wednesday, 9th to Sunday, 13th September is mostly a bust. The one exception is Thursday, 10th September morning, with a clean onshore wind and a 12ft SW swell, but the wave state is a question mark.
From Monday, 14th September, the swell dies. We get a couple of tiny, clean days on the 15th with 3-4ft swells and light offshore winds, but it's very small. That's a big gap of poor surf until the 17th.
The last day, Thursday, 17th September, shows a pulse of 8ft swell, but the wind is a strong cross-offshore, making it a rough, marginal call.
The pick of the entire period is Friday, 4th September. It's a big, powerful day for experts only. The rest is a bit of a mixed bag.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Fri night. Very mild (max 16°C on Fri afternoon, min 9°C on Thu night). Winds increasing (moderate winds from the NW on Fri afternoon, strong winds from the NW by Fri night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat morning. Very mild (max 14°C on Sat afternoon, min 8°C on Mon night). Winds decreasing (near gales from the WNW on Sat morning, calm by Mon night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 16 | SW 15 | SW 14 | WSW 14 | SW 14 | SW 15 | SW 16 | SW 16 | SW 16 | WSW 15 | WSW 11 | SW 13 | SW 14 | SW 13 | SW 12 | SW 13 | SW 13 | SW 12 | SW 18 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1685 | 2418 | 2544 | 3785 | 4735 | 5520 | 5134 | 4703 | 3415 | 3756 | 3896 | 3557 | 2284 | 1474 | 798 | 418 | 710 | 718 | 1124 | 2437 | 1806 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | off | cross-off | cross | cross |
High Tide | 2:56PM2.03m | 3:38AM2.11m | 3:28PM2.04m | 4:19AM2.12m | 4:02PM2.04m | 5:03AM2.09m | 4:39PM2.01m | 5:51AM2.01m | 5:21PM1.96m | 6:45AM1.91m | 6:11PM1.87m | 7:50AM1.81m | 7:15PM1.77m | ||||||||
Low Tide | 9:14PM0.17m | 9:36AM0.53m | 9:50PM0.08m | 10:13AM0.60m | 10:30PM0.05m | 10:53AM0.69m | 11:13PM0.07m | 11:37AM0.79m | 00:02AM0.13m | 12:28PM0.89m | 00:59AM0.24m | 1:33PM0.96m | 2:08AM0.36m | ||||||||
 | |  |  |  |  | |  |  | | | | | | | | | | | | | |
 | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — |
 | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — |
mm | — | — | — | 2 | — | — | — | — | 10 | 1 | 1 | 1 | — | — | 1 | — | — | — | — | — | 1 |
Temp °C | 13 | 13 | 13 | 12 | 13 | 12 | 14 | 16 | 15 | 13 | 14 | 13 | 12 | 14 | 13 | 12 | 11 | 10 | 13 | 13 | 12 |
Feels °C | 8 | 6 | 5 | 4 | 5 | 6 | 8 | 11 | 8 | 1 | 4 | 7 | 7 | 10 | 8 | 6 | 7 | 8 | 8 | 5 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 14 | — | SW 14 | SW 15 | SW 16 | SW 16 | SW 16 | SSW 15 | — | — | SW 14 | SW 13 | SW 12 | SW 13 | SW 13 | SW 12 | SW 12 | SW 17 | SW 16 |
| kJ | 1685 | 2418 | 2544 | — | 4735 | 5520 | 5134 | 4703 | 3415 | 204 | — | — | 2284 | 1474 | 798 | 418 | 710 | 718 | 542 | 2437 | 1806 |
Swell 2 Height (m) Direction Period (s) | WSW 6 | SSW 16 | SSW 14 | — | — | — | SSW 16 | SSW 17 | SSW 16 | — | — | — | SSW 15 | WSW 18 | WSW 16 | SW 22 | SW 21 | SW 20 | SW 18 | SSW 17 | SSW 16 |
| kJ | 59 | 215 | 158 | — | — | — | 280 | 317 | 291 | — | — | — | 42 | 31 | 25 | 18 | 72 | 464 | 1124 | 116 | 97 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 14 | — | S 22 | SW 22 | SSW 20 | SSW 18 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 19 | — | 9 | 73 | 38 | 63 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NW 4 | WSW 14 | SW 14 | — | NW 4 | — | NNW 4 | WSW 15 | WSW 11 | SW 13 | — | — | — | W 4 | SSW 7 | — | — | — | — |
| kJ | — | — | 26 | 3785 | 3278 | — | 17 | — | 11 | 3756 | 3896 | 3557 | — | — | — | 20 | 48 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 59 | 50 | 62 | 62 | 58 | 0 | 0 | 333 | 490 | 530 | 62 | 1 | 0 | 8 | 294 | 10 | 0 | 8 | 58 | 73 |
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.
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