
Surf Forecasts:
Cyrils and Big Left surf forecast from 14 Sep 2026:
- Best quality surf: Friday 18 Sep, 1AM (local time) - 6ft (1.8m), 14s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 7PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,812 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 1AM (local time) - 6ft (1.8m), 14s 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 18) at 1AM. The primary swell is predicted to be 1.8m and 14s period with a secondary swell of 0.7m and 5s. 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 14s and forecast to arrive on Tuesday (Sep 15) at 7PM. 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 Sunday (Sep 20) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 18th Sep) | 6ft (1.8m) 14s |
| Best Surf | 1AM (Fri 18th Sep) | 6ft (1.8m) 14s |
| Most Powerful | 7PM (Tue 15th Sep) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's on the cards for the next couple of weeks. We've only got one spot to work with, and that's Cyrils and Big Left, a solid reef setup that needs a south swell. The water temp is feeling pretty standard for this time of year, no major surprises there.
Alright, straight up, the first few days are a write-off. Tuesday the 15th and Wednesday the 16th are a mess – strong cross-shore winds, big lumpy swell, and the energy is high but it's all junk. You're looking at combined swell energy readings like 2637 and 4084, but it's just not surfable. Thursday the 17th is still pretty average with moderate cross-shore wind and a cross-chop on a 7ft to 7ft SW swell, period around 14 seconds. It's marginal at best.
The first real glimmer of hope comes Friday morning, the 18th. We get a moderate offshore wind from the NW cleaning up a 6ft SW swell. The combined energy is still strong at 1740. It's clean, but still a bit of a handful for the average punter. Saturday the 19th morning has a similar idea, fresh offshore but that swell is starting to drop, energy down to 991. It's clean but the juice is fading.
Then we hit a massive lull. Sunday the 20th is a write-off – a near gale offshore, 34 mph winds, making it impossible. The swell drops to 3ft. Monday the 21st is choppy onshore junk. Tuesday the 22nd and Wednesday the 23rd are looking better. On Tuesday the 22nd morning we've got a moderate offshore wind and an 8ft SW swell with a 15-second period, clean. Energy is 3838. That's the standout for the first week, but it's still only a marginal call for quality. Wednesday the 23rd has cleaner, smaller surf with moderate offshore, 5ft to 4ft, and lower energy, but it's tidy.
Now, for the second week, things get interesting but we're looking further out, so less certain. The absolute highlight looks to be Saturday the 26th of September. We've got a fresh offshore wind cleaning up a solid 10ft SW groundswell in the morning, blowing up to 12ft in the afternoon with a very long 19-second period. The combined energy is massive, 5547 in the morning and a huge 7992 in the afternoon. That is a serious, powerful swell. It's a reef break, so that long period will wrap in nicely, but at 10ft to 12ft this is expert-only territory. It's going to be a proper big-wave day. Crowds are possible here, but on a day that size, most people will be watching from the rocks. Friday the 25th afternoon could also be a nice one with a 5ft, 17-second swell and clean conditions.
Overall, there's a lot of junk to sift through. The best call is definitely Saturday the 26th for the big swell, but you need to know what you're doing. Friday the 18th morning is the pick of the early days for some cleaner, more manageable waves.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Very mild (max 15°C on Mon night, min 10°C on Tue night). Winds decreasing (strong winds from the SW on Tue afternoon, light winds from the WSW by Thu afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sat afternoon, min 8°C on Thu night). Winds increasing (light winds from the WSW on Thu night, near gales from the N by Sun morning). | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 13 | SW 14 | SW 13 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | WSW 11 | SW 12 |
Wave Graph | |||||||||||||||||||
128 | 2462 | 4084 | 4369 | 3695 | 3444 | 2982 | 1855 | 1485 | 1169 | 1044 | 790 | 1273 | 991 | 981 | 442 | 216 | 1921 | 2055 | |
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 | cross | off | off | cross-off | off | off | cross-off | off | off | cross-off | cross |
High Tide | 2:20AM2.11m | 2:19PM2.03m | 3:01AM2.13m | 2:54PM2.02m | 3:39AM2.11m | 3:27PM1.98m | 4:15AM2.05m | 3:58PM1.93m | 4:50AM1.96m | 4:29PM1.85m | 5:27AM1.85m | 5:00PM1.76m | |||||||
Low Tide | 8:23AM0.48m | 8:37PM0.16m | 9:01AM0.52m | 9:13PM0.14m | 9:37AM0.57m | 9:47PM0.17m | 10:11AM0.64m | 10:21PM0.24m | 10:43AM0.73m | 10:55PM0.33m | 11:17AM0.83m | 11:31PM0.43m | |||||||
— | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
— | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | |
mm | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 16 | 19 | 16 | 21 | 23 | 18 | 22 | 19 | 16 |
Feels °C | 11 | 1 | 1 | 1 | 3 | 5 | 5 | 5 | 6 | 6 | 10 | 14 | 10 | 15 | 17 | 14 | 11 | 14 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 13 | WSW 16 | — | SSW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | — | — |
128 | 175 | — | 128 | 3695 | 3444 | 2982 | 1855 | 1485 | 1169 | 1044 | 790 | 1273 | 991 | 981 | 442 | 216 | — | — | |
Swell 2 Height (m) Direction Period (s) | SW 18 | — | — | — | SSW 16 | — | — | SSW 15 | — | SW 5 | SW 18 | SW 16 | — | — | SW 20 | WSW 18 | SW 16 | — | — |
111 | — | — | — | 284 | — | — | 121 | — | 29 | 522 | 635 | — | — | 15 | 32 | 151 | — | — | |
Swell 3 Height (m) Direction Period (s) | S 18 | — | — | — | — | — | — | — | — | — | SSW 18 | — | — | — | — | — | — | — | — |
6 | — | — | — | — | — | — | — | — | — | 174 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 14 | SW 13 | SW 14 | SW 15 | SW 15 | SSW 6 | SW 5 | SW 5 | — | NW 3 | NW 3 | NW 3 | NNW 3 | WNW 4 | NNW 3 | NW 5 | WSW 11 | SW 12 |
34 | 2462 | 4084 | 4369 | 2483 | 2264 | 85 | 42 | 35 | — | 3 | 5 | 7 | 6 | 5 | 12 | 87 | 1921 | 2055 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 462 | 816 | 266 | 327 | 136 | 10 | 59 | 73 | 0 | 0 | 8 | 50 | 21 | 8 | 21 | 534 | 90 | 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.










