
Surf Forecasts:
Cyrils and Big Left surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 1PM (local time) - 5ft (1.6m), 17s period, SW swell with offshore winds.
- Most powerful swell: Monday 3 Aug, 4PM (local time) - 10ft (3.0m), 15s period, WSW swell with 3,207 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 10PM (local time) - 4.5ft (1.3m), 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 Friday (Jul 31) at 10PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.4m and 20s. 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 3.0m 15s and forecast to arrive on Monday (Aug 03) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Monday (Aug 03) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 31st Jul) | 4.5ft (1.3m) 12s |
| Best Surf | 1PM (Sat 1st Aug) | 5ft (1.6m) 17s |
| Most Powerful | 4PM (Mon 3rd Aug) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
Righto, let’s chew through what’s coming up for this break. Only one reef in the frame: Cyrils and Big Left. Water temp is 57°F, which is about average for the season, so nothing out of the ordinary.
We’ve got a slow start, but it gets moving on Friday morning, July 31st. That morning brings a clean 5ft SW groundswell with a 12-second period and a light cross-off NNW breeze at 9 mph. The combined energy sits at 592 – moderate. It’s not huge, but it’s clean and rideable. Friday afternoon turns cross and the forecast goes shaky.
Saturday, August 1st, is the one to get excited about. The morning looks clean with a 4ft SW swell and a 15-knot N cross-off breeze. But the gold is Saturday afternoon: clear skies, a strong 6ft SW groundswell with a very long 17-second period, and a clean offshore NNW wind at 12 mph. Wave energy is strong at 2005. This is an excellent window for experienced surfers – that swell is over 5ft, so it’s not for beginners, but for the seasoned crew, this reef will be showing its teeth with proper lines.
Sunday, August 2nd, still holds that quality 6ft to 5ft SW groundswell with a very long period around 16 seconds, but the offshore wind gets fresh, up to 19-22 mph. It’s clean, but paddling out and staying in position will be a fight.
From Monday the 3rd through the rest of the first week, the swell size and quality get messy. Monday afternoon sees a jump to 10ft SW swell, but with a risk of thunderstorms and a strong cross-off wind – big and rough, only for the hardcore. Tuesday the 4th turns poor with that same 10ft and a strong onshore cross wind.
Then a lull in quality until Friday, August 7th. That Friday, both morning and afternoon score excellent for experienced surfers: 5ft to 5ft SW groundswell, long 15-second period, and a light N cross-off breeze. Clean and well-shaped.
After that, from the 8th through the 10th, the wind picks up to strong, near-gale force offshore. The swell still pulses, but paddling into anything is a real grind. The 10th sees a W swell pushing 8ft, but with 31 mph winds – expert-only, if anyone’s mad enough.
The second week is mostly a bust. Some big swells hit (up to 10ft and 5113 energy on Tuesday the 11th), but the wind howls out of the NNW and NW, making it a battle. By Thursday the 15th, there’s a promising 7ft SW swell with an 18-second period and a strong offshore N wind, but again, the paddle-out will be a chore. This setup starts looking more like a kite-surfing show if the wind sticks.
Heads up: this reef has crowds listed as "sometimes", so on the cleaner days you might have a few pals out, but it won’t be mobbed.
So, my pick: Saturday afternoon, August 1st, is the standout. Circle it. Friday, August 7th, is your next best shot for cleaner, smaller conditions. Beyond that, the wind and size make it a tough call.
Stay sharp and keep that Saturday in mind.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Very mild (max 15°C on Sun afternoon, min 9°C on Fri morning). Winds increasing (calm on Fri night, fresh winds from the N by Sun morning). | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Mon afternoon. Very mild (max 13°C on Tue afternoon, min 9°C on Mon night). Winds decreasing (strong winds from the WNW on Mon night, light winds from the SW by Wed night). | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 12 | SW 12 | SW 12 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 15 | SW 13 | SW 11 | SW 10 | SW 9 | SW 10 | SW 14 | SW 13 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
565 | 494 | 383 | 386 | 1837 | 2413 | 1591 | 1297 | 1034 | 1006 | 3207 | 1945 | 1941 | 687 | 447 | 313 | 632 | 512 | 252 | 737 | 1187 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross-on | cross-on | cross-off |
High Tide | 1:26PM1.90m | 1:02AM1.61m | 2:01PM1.96m | 1:51AM1.68m | 2:32PM2.01m | 2:34AM1.76m | 3:01PM2.03m | 3:15AM1.84m | 3:29PM2.04m | 3:56AM1.91m | 3:57PM2.03m | 4:37AM1.95m | 4:28PM2.02m | ||||||||
Low Tide | 7:35PM0.86m | 7:19AM0.43m | 8:12PM0.73m | 8:00AM0.42m | 8:45PM0.61m | 8:38AM0.43m | 9:16PM0.49m | 9:15AM0.47m | 9:47PM0.38m | 9:52AM0.52m | 10:20PM0.27m | 10:30AM0.60m | 10:55PM0.19m | ||||||||
7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | |
— | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | 5 | 5 | 2 | 2 | — | — | — | 1 | — | — | — |
Temp °C | 10 | 12 | 12 | 11 | 14 | 12 | 12 | 15 | 13 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 13 | 13 | 13 |
Feels °C | 7 | 10 | 11 | 6 | 9 | 7 | 4 | 8 | 7 | 2 | 4 | 5 | 5 | 5 | 7 | 9 | 6 | 7 | 9 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | — | SW 18 | — | SW 12 | SW 9 | SW 10 | SW 14 | SW 13 | SW 12 | SW 16 | SW 15 |
565 | 494 | 383 | 386 | 1837 | 2413 | 1591 | 1297 | 1034 | 1006 | — | 194 | — | 403 | 351 | 313 | 632 | 512 | 252 | 737 | 1187 | |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 20 | SW 19 | SW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 18 | — | — | — | SSW 16 | SW 11 | SW 20 | SW 19 | SW 18 | SW 16 | SSW 16 | WSW 11 |
18 | 61 | 131 | 366 | 168 | 311 | 153 | 138 | 75 | 154 | — | — | — | 25 | 217 | 306 | 350 | 366 | 251 | 24 | 218 | |
Swell 3 Height (m) Direction Period (s) | S 21 | S 20 | S 19 | SSW 17 | — | — | — | — | WSW 20 | — | — | — | — | — | SW 21 | SW 13 | SW 19 | SSW 18 | S 8 | — | SSW 17 |
9 | 8 | 7 | 57 | — | — | — | — | 38 | — | — | — | — | — | 156 | 144 | 227 | 30 | 5 | — | 57 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNW 4 | N 3 | N 4 | N 3 | WNW 4 | WSW 15 | SW 13 | SW 11 | SW 10 | SW 9 | — | — | — | — | — | — |
— | — | — | — | — | 10 | 8 | 9 | 8 | 52 | 3207 | 1945 | 1941 | 687 | 447 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1 | 0 | 0 | 0 | 0 | 34 | 34 | 23 | 63 | 73 | 62 | 59 | 136 | 58 | 50 | 62 | 50 | 10 | 1 | 0 |
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.











