Cyrils and Big Left Surf Break

Lat Long: 38.49° S 145.02° E

Cyrils and Big Left Surf Forecast and Surf Report

Issued: 9 am 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cyrils and Big Left sea temperature is
13.3° C
0.4° 

Cyrils and Big Left surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


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 TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Thu 6th Aug)2.5ft (0.8m) 12s
Best Surf10AM (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 Forecast

Heavy 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 Summary

Light 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
Rating
(10 max)
2
2
2
2
0
0
1
0
2
2
1
4
4
4
4
2
3
1
0
2
6
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
15
1.9
WSW
15
2.1
WSW
13
1.6
SW
11
3
WSW
10
1.7
SW
10
0.6
SW
20
0.6
SW
19
0.9
SW
13
0.8
SW
12
0.9
SW
16
1.2
SW
15
1.7
SW
16
1.6
SW
15
1.4
SW
14
1.6
SW
16
1.6
SW
16
1.4
SW
14
1.3
WSW
14
2
WSW
13
3.5
WSW
19
Wave Graph
Metric surfscale
Energy kJ
1020
1488
1471
572
1734
580
253
284
286
208
406
657
1467
1155
834
1256
1194
763
626
1286
10196
Wind (km/h)
35
NW
30
WNW
35
WNW
30
NW
35
SW
25
WSW
20
WSW
35
WSW
25
W
25
NW
25
NW
15
WNW
10
NNW
5
NNW
15
N
30
N
30
N
45
NNW
55
N
30
NW
30
WSW
Wind State
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
rain showers
clear
rain showers
light rain
thunderstorm
rain showers
rain showers
rain showers
part cloud
part cloud
rain showers
rain showers
clear
part cloud
part cloud
part cloud
cloud
light rain
rain showers
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
7:18
7:16
7:16
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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