Surf Forecasts:
Cyrils and Big Left surf forecast from 27 Aug 2026:
- Best quality surf: Monday 31 Aug, 10PM (local time) - 7ft (2.2m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 1PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,420 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 4PM (local time) - 3.5ft (1.1m), 13s 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 27) at 4PM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.4m and 22s. 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 3.0m 14s and forecast to arrive on Thursday (Sep 03) at 1PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Tuesday (Sep 01) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Thu 27th Aug) | 3.5ft (1.1m) 13s |
| Best Surf | 10PM (Mon 31st Aug) | 7ft (2.2m) 17s |
| Most Powerful | 1PM (Thu 3rd Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
G’day, this is Rusty. We’ve got one spot on the radar for the next couple of weeks, and it’s a proper reef setup that’s gonna serve up some solid waves for the experienced crew. The water’s sitting at 56.7°F with an anomaly of 2°F, so it’s a touch warmer than normal for this time of year – not a big deal, but nice to know.
The action kicks off Thursday morning, August 27th, at Cyrils and Big Left. It’s a reef break that’s fairly consistent, so you can count on it. Thursday morning brings some clouds and a light WNW cross-off breeze at 6 mph, with 3.6 ft of SW swell at 12 seconds – clean and fun, energy is moderate at 440. The afternoon cleans up even more with a glassy NW offshore at 6 mph, swell bumping to 3.6 ft at 13 seconds, and energy up to 567 – expect very good conditions.
Friday, August 28th, is where it gets exciting. The morning has a NW offshore at 12 mph, pushing 4.6 ft of SW swell at 18 seconds – that’s a long-period groundswell, proper energy at 1953, and it’s excellent for experienced surfers. The afternoon turns to a SSW cross-on at 12 mph with 6.9 ft surf, but it gets choppy and poor – so hit the morning session.
Saturday, August 29th, the morning is clean with a WNW cross-off at 12 mph, 5.9 ft of SW swell at 14 seconds, energy at 1367 – it’s marginal but still rideable. The afternoon gets a WSW cross-shore at 12 mph, 5.6 ft swell, and a cross-chop, so it’s less appealing.
Sunday, August 30th, morning has a WNW cross-off at 12 mph, 5.9 ft swell at 13 seconds, energy 1247 – clean but marginal. The afternoon is a gentle WSW cross-shore at 9 mph, 5.9 ft swell, slight cross-chop, still okay.
Monday, August 31st, is a standout. The morning is glassy and clear with a NNW offshore at 6 mph, 6.9 ft of SW swell at 14 seconds – that’s excellent for experienced surfers, energy 1916. The afternoon goes dead calm with a SW glass at 0 mph, 6.2 ft swell at 14 seconds, energy 1849 – absolutely perfect conditions.
Tuesday, September 1st, gets windy. The morning has a strong N offshore at 28 mph, 5.9 ft swell at 16 seconds – it’s clean but hard to paddle into due to the wind. The afternoon is a near gale NNW at 31 mph, 5.2 ft swell at 15 seconds – near impossible to get out.
Wednesday, September 2nd, morning has a WNW cross-off at 16 mph, 7.5 ft swell at 15 seconds, energy 3896 – solid but marginal. The afternoon is a gentle WSW cross-shore at 9 mph, 7.5 ft swell at 14 seconds, with a slight cross-chop.
Thursday, September 3rd, morning has a fresh NW offshore at 19 mph, 9.8 ft of SW swell at 14 seconds – that’s big, only for experts, with energy 3196. The afternoon is a fresh NW cross-off at 22 mph, same swell, but still clean.
Friday, September 4th, morning has a strong NW cross-off at 25 mph, 9.8 ft swell at 14 seconds, energy 3203 – clean but gnarly. The afternoon is a moderate WNW cross-off at 12 mph, 8.2 ft swell at 15 seconds, energy 2944 – still only for the experienced.
Saturday, September 5th, is blown out. The morning has a near gale NNW offshore at 34 mph, 6.6 ft swell at 14 seconds – poor and hard to paddle. The afternoon is a near gale WNW cross-off at 31 mph, 5.6 ft swell at 14 seconds – still poor.
Sunday, September 6th, morning has a fresh NNW offshore at 19 mph, 7.2 ft WSW swell at 13 seconds, energy 1572 – marginal. The afternoon gets interesting with light rain, a WSW cross-shore at 6
Short Range ForecastMostly dry. Very mild (max 13°C on Thu afternoon, min 9°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 10°C on Sun morning). Winds increasing (calm on Mon afternoon, strong winds from the NNW by Tue afternoon). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 13 | SW 20 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
344 | 392 | 455 | 1136 | 2454 | 1958 | 1307 | 1163 | 680 | 1103 | 1052 | 1460 | 1665 | 1443 | 2247 | 1494 | 1154 | 1533 | 2276 | 2155 | 1777 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | off | glassy | off | off | off | cross-off | cross-off | cross | cross-off |
High Tide | 11:22AM1.66m | 10:38PM1.48m | 12:12PM1.74m | 11:51PM1.56m | 12:50PM1.83m | 00:48AM1.69m | 1:24PM1.90m | 1:35AM1.82m | 1:55PM1.96m | 2:17AM1.95m | 2:25PM2.00m | 2:57AM2.05m | 2:56PM2.03m | 3:38AM2.11m | |||||||
Low Tide | 5:24PM1.07m | 5:16AM0.60m | 6:19PM0.93m | 6:12AM0.55m | 7:00PM0.77m | 7:00AM0.51m | 7:35PM0.60m | 7:42AM0.48m | 8:08PM0.44m | 8:21AM0.47m | 8:40PM0.29m | 8:59AM0.49m | 9:14PM0.17m | ||||||||
6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 13 | 12 | 11 | 12 | 11 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 15 | 15 | 17 | 19 | 17 | 12 | 13 | 12 |
Feels °C | 8 | 11 | 10 | 8 | 8 | 7 | 6 | 7 | 7 | 7 | 8 | 9 | 10 | 14 | 12 | 8 | 9 | 8 | 8 | 9 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 13 | SW 13 | WSW 13 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 14 | SW 13 |
344 | 392 | 451 | 760 | 2454 | 1958 | 1307 | 1163 | 680 | 1103 | 1052 | 1460 | 1665 | 1443 | 2247 | 1494 | 1154 | 1533 | 2276 | 2155 | 1777 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 22 | SW 20 | SW 18 | SSW 17 | SSW 16 | SW 5 | SSW 14 | SW 6 | SW 20 | SW 20 | SSW 16 | WSW 19 | SW 19 | SSW 16 | SSW 15 | SSW 13 | SSW 15 | SSW 16 | SSW 15 | — |
76 | 118 | 455 | 1136 | 59 | 25 | 20 | 19 | 65 | 136 | 134 | 86 | 251 | 369 | 217 | 131 | 70 | 77 | 140 | 121 | — | |
Swell 3 Height (m) Direction Period (s) | SW 22 | S 11 | S 20 | S 18 | — | — | — | W 24 | WSW 22 | S 20 | S 20 | — | — | SSW 20 | — | — | — | — | — | — | — |
20 | 57 | 30 | 57 | — | — | — | 11 | 45 | 8 | 8 | — | — | 37 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | W 3 | — | — | — | — | SW 5 | — | — | — | — | — | — | — | — | NNW 4 | NW 4 | NW 4 | SW 15 | — | NW 4 |
— | 1 | — | — | — | — | 40 | — | — | — | — | — | — | — | — | 27 | 32 | 13 | 1480 | — | 21 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 10 | 13 | 1 | 73 | 0 | 8 | 1 | 6 | 0 | 0 | 0 | 479 | 333 | 59 | 1 | 1 | 8 |
Best forecast wave conditions in Mornington Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











