
Surf Forecasts:
Cyrils and Big Left surf forecast from 5 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 10PM (local time) - 13ft (4.0m), 18s period, SW swell with cross-onshore winds.
- Most powerful swell: Wednesday 9 Sep, 4PM (local time) - 13ft (4.0m), 19s period, SW swell with 10,597 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 7AM (local time) - 6ft (1.8m), 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 Tuesday (Sep 08) at 7AM. The primary swell is predicted to be 1.8m and 12s period with a secondary swell of 1.1m and 19s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cyrils and Big Left in the next 16 days are 4.0m 19s and forecast to arrive on Wednesday (Sep 09) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Sep 12) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 8th Sep) | 6ft (1.8m) 12s |
| Best Surf | 10PM (Wed 9th Sep) | 13ft (4.0m) 18s |
| Most Powerful | 4PM (Wed 9th Sep) | 13ft (4.0m) 19s |
Table - best surf conditions forecast for Cyrils and Big Left over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer. The only break that’s doing anything in this whole 16-day window is Cyrils and Big Left, a reef setup that needs a decent south swell to get going. The water’s sitting at 57°, which is pretty normal for this time of year, nothing to write home about.
Things kick off on Saturday the 5th of September, and honestly, it’s a rough start. You’ve got a solid 8ft SW groundswell with a long 15-second period, so there’s plenty of energy in the water (2533 combined energy), but that 25 mph offshore wind is a proper strong breeze. It’s clean, sure, but it’s going to be a nightmare to paddle into. Not my idea of a good time. The afternoon is much the same, just a bit smaller.
Sunday the 6th is still messy. The swell sticks around 8ft, but the wind swings cross-shore, and it’s not clean. By Monday the 7th, the swell drops right off, and the wind is junk. Tuesday the 8th shows a bit of promise with a clean morning session, but the swell is only 4ft, and that 18-second period is so long it might just close out the beach, though this is a reef, so it should handle it. The energy is moderate (1828).
Then the real size shows up. From Wednesday the 9th, we’re looking at 12ft to 13ft SW groundswell, with combined energy readings hitting 7606 and 11409 - that’s some serious grunt. But the wind is onshore and lumpy, making it a write-off for paddle surfing. This setup honestly looks more interesting for kite surfing than paddle surfing. Thursday the 10th is a bit better, down to 12ft with a manageable cross-shore, and the energy is still huge (8781 in the morning, 10076 in the afternoon), but it’s still cross-chop.
The real standout, the one you’ve been waiting for, is Saturday the 12th of September. The swell drops to a clean 7ft in the morning, easing to 6ft in the afternoon, still a solid SW groundswell with a 15-second period. The wind goes light offshore, glassy, clean - it’s going to be perfect. The combined energy (2363 and 1750) is moderate to strong, but it’s the conditions that make it. This is the one for experienced surfers. The crowds are sometimes an issue, so keep that in mind.
Sunday the 13th is still good, with 5ft surf and a fresh offshore breeze, but it’s not as clean as Saturday. The energy drops to around 1100, so it’s a bit weaker. Monday the 14th is tiny, and then Tuesday the 15th throws another massive 13ft to 16ft swell at us, but the wind is onshore and junk by the afternoon. That’s kite-surf territory again.
The second week is a bit of a mixed bag. Wednesday the 16th and Thursday the 17th are messy or small. The next clear standout is Sunday the 20th of September. Morning sees 6ft of SW groundswell with a 16-second period and a moderate offshore wind - clean, solid, and the energy is back up to 1905. The afternoon gets even better, with 7ft and an 18-second period, 2850 combined energy, and a clean offshore breeze. That’s another session to circle on the calendar, but it’s over a week away, so keep an eye on the forecasts.
Overall, Saturday the 12th is the clear winner. Get on it.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Sat morning. Very mild (max 16°C on Sat morning, min 9°C on Mon night). Winds decreasing (strong winds from the WSW on Sat night, light winds from the W by Mon night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 12°C on Tue afternoon, min 8°C on Tue morning). Winds decreasing (strong winds from the SSW on Tue night, light winds from the WSW by Thu night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 | SW 15 | SW 10 | SW 14 | SW 14 | SW 13 | SW 12 | SW 7 | SW 14 | SW 18 | SW 14 | SW 16 | SW 16 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 15 |
Wave Graph | |||||||||||||||||||||
2329 | 2168 | 2549 | 2110 | 1528 | 576 | 336 | 352 | 898 | 901 | 1214 | 2687 | 6119 | 10597 | 9982 | 7812 | 5786 | 3725 | 2278 | 2082 | 2372 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-off | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross-on | off |
High Tide | 4:39PM2.01m | 5:51AM2.01m | 5:21PM1.96m | 6:45AM1.91m | 6:11PM1.87m | 7:50AM1.81m | 7:15PM1.77m | 9:05AM1.76m | 8:39PM1.69m | 10:21AM1.77m | 10:13PM1.70m | 11:25AM1.83m | 11:35PM1.80m | ||||||||
Low Tide | 10:53AM0.69m | 11:13PM0.07m | 11:37AM0.79m | 00:02AM0.13m | 12:28PM0.89m | 00:59AM0.24m | 1:33PM0.96m | 2:08AM0.36m | 2:56PM0.97m | 3:28AM0.44m | 4:22PM0.88m | 4:47AM0.48m | 5:34PM0.71m | ||||||||
6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:28 | — | — | 6:28 | — | — | |
— | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | |
mm | 1 | 1 | 2 | — | — | 1 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 14 | 13 | 13 | 13 | 13 | 13 | 11 | 10 | 10 | 12 | 11 | 11 | 12 | 12 | 11 | 12 | 12 | 10 | 10 | 10 |
Feels °C | 9 | 6 | 4 | 9 | 10 | 9 | 7 | 4 | 5 | 6 | 6 | 4 | 2 | 3 | 3 | 6 | 8 | 8 | 7 | 7 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | — | SW 14 | SW 14 | SW 13 | SW 12 | SW 13 | SW 14 | SW 13 | SW 13 | SW 16 | SW 21 | SSW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 15 |
2329 | 2168 | — | 2110 | 1528 | 576 | 336 | 193 | 898 | 865 | 659 | 2687 | 1117 | 812 | 9982 | 7812 | 5786 | 3725 | 2278 | 2082 | 2372 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SSW 15 | — | S 7 | — | WSW 16 | SW 22 | SW 21 | S 6 | SW 18 | SW 17 | — | SSW 16 | — | SSW 19 | SSW 17 | SSW 17 | SSW 16 | — | — | SSW 16 |
204 | 131 | — | 65 | — | 87 | 18 | 70 | 98 | 901 | 1172 | — | 217 | — | 1209 | 969 | 650 | 344 | — | — | 382 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 20 | — | — | SW 22 | S 21 | SW 20 | SSW 18 | SSW 18 | W 26 | SSW 21 | — | — | — | — | — | — | — | — |
— | — | — | 15 | — | — | 18 | 9 | 377 | 62 | 60 | 13 | 153 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | WNW 5 | SW 10 | SW 14 | SSW 6 | SW 6 | SW 6 | SW 7 | — | — | SW 14 | SW 7 | SW 16 | SW 19 | SW 18 | — | SW 17 | SW 16 | — | — | — |
33 | 78 | 2549 | 1536 | 62 | 86 | 116 | 352 | — | — | 1214 | 111 | 6119 | 10597 | 6623 | — | 3640 | 2354 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 501 | 467 | 319 | 58 | 1 | 1 | 59 | 136 | 10 | 1 | 62 | 462 | 581 | 632 | 58 | 58 | 62 | 8 | 8 | 10 | 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.










