
Surf Forecasts:
Cyrils and Big Left surf forecast from 3 Aug 2026:
- Best quality surf: Monday 10 Aug, 10AM (local time) - 15ft (4.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 7AM (local time) - 16ft (5.0m), 16s period, WSW swell with 13,052 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 7AM (local time) - 2.5ft (0.8m), 12s 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 Thursday (Aug 06) at 7AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.9m and 6s. Another secondary swell of 1.2m and 6s is also forecast. 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 5.0m 16s and forecast to arrive on Monday (Aug 10) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 5s period and expected on Sunday (Aug 09) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 6th Aug) | 2.5ft (0.8m) 12s |
| Best Surf | 10AM (Mon 10th Aug) | 15ft (4.5m) 16s |
| Most Powerful | 7AM (Mon 10th Aug) | 16ft (5.0m) 16s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
Alright, let’s get into it. The only spot firing in this window is a reef set-up, and there’s a whole lot of waiting around before things get really good. Here’s the rundown.
We’re looking at Cyrils and Big Left for the whole 16-day stretch. The water temp is sitting at 56°F, which is pretty much bang on average for this time of year, so no surprises there.
The first few days are a bit of a write-off, honestly. Monday 3rd August through to Wednesday 5th, we’ve got swell hanging around 5 ft to 6 ft, but the wind is a problem – cross-off or cross, with a fresh breeze. The wave energy is moderate to strong (1020 to 1734), but the conditions are just marginal or poor. Not worth paddling out for.
Thursday 6th is a tease. The swell drops right off to 2 ft to 3 ft, and the wind goes offshore and clean, but there’s just not enough push. The energy is low (429 to 467).
Now, Friday 7th August is the first real standout. Morning brings a clean 6 ft swell from the SW with a solid 16-second period, and a light offshore breeze from the NNW at 6 mph. The energy is strong (1519). The afternoon is even better – glassy conditions, 5 ft swell, and the same long period. This is excellent for experienced surfers. The swell direction is from the SW, which is a touch off the optimum S direction, but the quality is there. Crowds are possible, so get there early.
Saturday 8th is still decent, with 5 ft SW swell and a 16-second period. The wind is cross-off to offshore, but it’s a fresh breeze (19 mph), which takes the shine off a bit. The energy is still strong (1243 to 1345).
Sunday 9th is a write-off – strong winds, 34 mph in the morning, making it near gale-force. Not surfable.
Monday 10th August is a monster. Morning sees a massive 15 ft SW swell with a 16-second period, and the energy is off the charts (17218). The wind is moderate cross-off, but the model says the swell is too big for this break. Stick to the afternoon, when the swell drops to 12 ft and the wind goes offshore. This is exceptional for experts only. Anything over 8 ft is for the brave.
Tuesday 11th to Thursday 14th keeps the swell solid, between 7 ft and 10 ft, with that long SW groundswell. The wind is offshore to cross-off, but often strong, making it hard to paddle into. The energy is strong to very strong (1914 to 8863). The model rates the Thursday sessions as excellent, but the wind is cross-off, not perfect.
Friday 15th and Saturday 16th see a drop in quality. The wind turns cross-on or cross, and the swell gets messy. The energy is still strong, but the conditions are choppy and lumpy.
Sunday 16th is similar – cross-shore wind, 6 ft swell, but not clean.
Monday 17th morning has a clean 8 ft SW swell with a 17-second period and moderate wind, but it’s big. The afternoon turns onshore and choppy.
The very best on offer is Friday 7th August – that glassy afternoon session with 5 ft of clean, long-period SW swell is the pick of the window. The second best is Monday 10th August afternoon, but only for experts. The long period (15-17 seconds) means these swells are proper groundswell, and at a reef break like Cyrils and Big Left, that’s a beautiful thing – the waves will peel nicely.
After that, the forecast gets less certain, but Tuesday 18th August morning looks promising with a clean 6 ft swell from the SW, a 17-second period, and a gentle breeze. That’s one to watch as it gets closer.
Rusty.
Short Range ForecastHeavy rain (total 32mm), heaviest during Mon night. Very mild (max 12°C on Mon afternoon, min 9°C on Mon night). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sat night. Very mild (max 15°C on Sat afternoon, min 9°C on Thu morning). Winds increasing (calm on Fri afternoon, near gales from the N by Sat night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 15 | WSW 15 | WSW 13 | SW 11 | WSW 10 | SW 10 | SW 20 | SW 19 | SW 13 | SW 12 | SW 16 | SW 15 | SW 16 | SW 15 | SW 14 | SW 16 | SW 16 | SW 14 | WSW 14 | WSW 13 | WSW 19 |
Wave Graph | |||||||||||||||||||||
1020 | 1488 | 1471 | 572 | 1734 | 580 | 253 | 284 | 286 | 208 | 406 | 657 | 1467 | 1155 | 834 | 1256 | 1194 | 763 | 626 | 1286 | 10196 | |
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 | cross | cross | cross | cross-off | off | off | cross-off | off | glassy | off | cross-off | off | off | off | cross-off | cross |
High Tide | 3:01PM2.03m | 3:15AM1.84m | 3:29PM2.04m | 3:56AM1.91m | 3:57PM2.03m | 4:37AM1.95m | 4:28PM2.02m | 5:22AM1.97m | 5:02PM1.99m | 6:11AM1.96m | 5:41PM1.95m | 7:08AM1.91m | 6:27PM1.90m | ||||||||
Low Tide | 9:16PM0.49m | 9:15AM0.47m | 9:47PM0.38m | 9:52AM0.52m | 10:20PM0.27m | 10:30AM0.60m | 10:55PM0.19m | 11:11AM0.69m | 11:36PM0.14m | 11:56AM0.80m | 00:23AM0.12m | 12:47PM0.91m | 1:19AM0.15m | ||||||||
7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | |
— | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | |
mm | 1 | — | 6 | 5 | 4 | 10 | 5 | 1 | — | — | 1 | 1 | — | — | — | — | — | 5 | 2 | 5 | 2 |
Temp °C | 11 | 12 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 9 | 12 | 12 | 13 | 14 | 13 | 14 | 15 | 14 | 12 | 13 | 12 |
Feels °C | 3 | 5 | 3 | 3 | 5 | 7 | 7 | 4 | 6 | 3 | 7 | 8 | 10 | 12 | 10 | 7 | 8 | 6 | 3 | 7 | 2 |
Swell 1 Height (m) Direction Period (s) | SW 15 | WSW 15 | SW 17 | SW 11 | WSW 10 | SW 10 | SW 11 | SW 14 | SW 6 | SW 6 | SW 16 | SW 15 | SW 16 | SW 15 | SW 14 | SW 16 | SW 16 | SW 14 | WSW 14 | WSW 13 | SSW 20 |
1020 | 1488 | 241 | 572 | 1734 | 580 | 90 | 245 | 100 | 46 | 406 | 657 | 1467 | 1155 | 834 | 1256 | 1194 | 763 | 626 | 1286 | 38 | |
Swell 2 Height (m) Direction Period (s) | — | S 20 | SSW 18 | SW 13 | — | SW 21 | SW 20 | SW 19 | SW 13 | SW 12 | SW 5 | SW 18 | SSW 16 | SW 19 | SW 18 | SSW 16 | SSW 16 | — | SW 18 | SW 17 | — |
— | 7 | 30 | 431 | — | 154 | 239 | 284 | 286 | 175 | 23 | 334 | 52 | 441 | 516 | 89 | 49 | — | 83 | 342 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 20 | SW 14 | SSW 19 | SW 18 | SW 16 | WSW 20 | SW 7 | — | SSW 19 | SSW 18 | — | — | — | S 18 | — | — |
— | — | — | — | — | 40 | 91 | 34 | 197 | 208 | 38 | 33 | — | 36 | 30 | — | — | — | 6 | — | — | |
Wind waves Height (m) Direction Period (s) | WNW 4 | NW 4 | WSW 13 | WNW 4 | — | — | SW 8 | SW 6 | WSW 6 | NW 3 | NW 3 | NW 3 | NNW 3 | — | N 3 | N 3 | N 4 | NNW 4 | NW 5 | NW 6 | WSW 19 |
33 | 11 | 1471 | 31 | — | — | 253 | 157 | 128 | 2 | 2 | 2 | 2 | — | 4 | 7 | 10 | 30 | 70 | 77 | 10196 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 67 | 91 | 59 | 59 | 121 | 34 | 62 | 62 | 1 | 0 | 59 | 0 | 0 | 0 | 0 | 21 | 12 | 104 | 171 | 13 | 58 |
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.











