Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 3 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.3° C
0.8° 

Marengo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Marengo surf forecast from 4 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 4PM (local time) - 5ft (1.6m), 14s period, SW swell with offshore winds.
  • Most powerful swell: Monday 10 Aug, 7AM (local time) - 6ft (1.8m), 19s period, SW swell with 2,244 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 4PM (local time) - 5ft (1.6m), 14s period with SW swell.

Best Forecast Surf Conditions for Marengo this week:

The surf forecast for Marengo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 4PM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.7m and 14s. Another secondary swell of 0.8m and 8s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Marengo in the next 16 days are 1.8m 19s 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 1.3m 6s period and expected on Sunday (Aug 09) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Wed 5th Aug)5ft (1.6m) 14s
Best Surf 4PM (Wed 5th Aug)5ft (1.6m) 14s
Most Powerful 7AM (Mon 10th Aug)6ft (1.8m) 19s

Table - best surf conditions forecast for Marengo over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s coming up for Marengo over the next couple of weeks.

Right off the bat, we’ve got a bit of a mixed bag. The surf is there, but it’s not going to be straight-forward all the time. The water temp is sitting at 58°, which is pretty much normal for this time of year, so no shocks there.

We’re starting off on Wednesday the 5th with some SW swell pushing in at 6 ft, but the period is a short 8 seconds and the wind is a cross-off. It’s a bit messy, and the energy is moderate (944). Not the best for a paddle out; it’s a marginal one. The afternoon cleans up with a solid 5 ft swell and a much longer 14-second period, with offshore wind. The energy jumps up (1372), and it’s looking excellent for experienced surfers. That’s a decent window.

Thursday the 6th drops right off. Swell drops to 2 ft in the morning, even with a long 16-second period, it’s just too small. The afternoon is a little better at 3 ft, but still nothing to get excited about.

Now, Friday the 7th is where it gets interesting. Morning session has 5 ft of SW groundswell with a 16-second period and light offshore wind. The energy is strong (1136). Then the afternoon goes glassy with 4 ft and a 15-second period. That’s clean, lined-up surf – a real standout for the first week.

Saturday the 8th and Sunday the 9th are a write-off. Saturday has cross/chop winds, and Sunday is a total mess with fresh cross-shore winds, rain, and lumpy conditions. The swell is small and weak. Not worth paddling out.

Monday the 10th sees a big jump in energy. 6 ft in the morning with a 18-second period, but the wind is a strong cross-off (25 mph). The afternoon is better with a fresh offshore wind and 6 ft of swell. The energy is very strong (2554), but the wind is still fresh. Good for experienced guys only.

Tuesday the 11th is similar – 4 ft swell with fresh offshore winds, but the energy is moderate (736). It’s clean but not ground-breaking.

Now, here’s the big one. Wednesday the 12th afternoon. The swell jumps to 16 ft from the WSW with a 17-second period. The energy is enormous (17871). The wind is a strong cross-off. This is huge, powerful, and only for the most experienced. It’s a standout for the big-wave crew.

Thursday the 13th morning is too big at 20 ft with a 16-second period. The data says it’s predicted to be too big for this break. The energy is massive (24033). The afternoon drops to 13 ft, which is still enormous. Friday the 14th remains in the 10 ft to 12 ft range with very strong energy. This whole stretch from Wednesday the 12th to Friday the 14th is for experts only. The swell is well over 8 ft.

The weekend of the 15th and 16th settles down. Saturday the 15th has 8 ft in the morning, dropping to 7 ft in the afternoon with a gentle offshore wind. The energy is still strong (2040). That afternoon session on Saturday is a real highlight – clean, offshore, and decent size for stronger paddlers. Sunday the 16th is similar, with 5 ft to 6 ft and clean conditions.

Heading into the next week, Monday the 17th has a good morning session with 6 ft and a moderate offshore. Energy is very strong (2900). The afternoon is smaller but clean. Tuesday the 18th has a long-period 6 ft to 7 ft with cross-off winds. Wednesday the 19th is another standout with a gentle offshore and 7 ft of clean, lined-up swell. Excellent for experienced surfers.

Thursday the 20th wraps it up with a light breeze and 5 ft of swell. A nice, mellow finish.

So, to sum it up: the best bets are Friday the 7th for the clean, glassy afternoon session, and Saturday the 15th afternoon for the clean offshore conditions with solid swell. The big stuff from the 12th to the 14th is a major event for the chargers, but it’s not for the faint-hearted.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Wed morning. Very mild (max 14°C on Fri morning, min 8°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 35mm), heaviest during Sun night. Very mild (max 17°C on Sat morning, min 9°C on Mon night). Winds increasing (light winds from the N on Sat morning, near gales from the WSW by Sun night).

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
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
4
2
1
2
3
3
3
2
2
1
0
0
0
2
1
3
3
1
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
SW
8
1.6
SW
14
0.8
SW
17
0.7
SW
16
0.8
SW
16
1
SW
17
1.4
SW
16
1.2
SW
15
1.4
SW
17
1.3
SW
16
1.4
SW
15
1.1
SW
14
0.9
SW
14
0.6
SW
16
1.2
SW
20
1.8
SW
18
1.7
SW
17
1.8
SW
16
1.3
SW
14
1.3
WSW
14
1.7
WSW
17
Wave Graph
Metric surfscale
Energy kJ
361
1049
354
248
299
587
1005
640
1098
813
849
536
276
214
1195
2104
1722
1654
736
663
1796
Wind (km/h)
20
SW
20
WSW
10
NW
20
NW
20
WSW
10
W
5
WNW
5
ESE
10
NNE
25
NNW
20
N
20
N
30
NNE
30
NNE
25
WSW
40
WSW
30
WSW
20
NW
35
WNW
35
W
35
WNW
Wind State
cross-off
off
cross-off
cross-off
off
off
off
glassy
cross
cross-off
cross
cross
cross
cross
cross-off
cross-off
off
cross-off
cross-off
off
cross-off
High Tide
5:00PM2.02m
4:27AM1.93m
5:46PM2.00m
4:53AM1.85m
6:41PM1.95m
5:22AM1.77m
7:49PM1.89m
5:59AM1.68m
9:15PM1.87m
6:52AM1.57m
10:40PM1.93m
8:40AM1.47m
11:47PM2.03m
Low Tide
10:29AM0.25m
10:47PM0.82m
11:00AM0.18m
11:25PM0.97m
11:37AM0.15m
00:09AM1.14m
12:20PM0.18m
1:06AM1.29m
1:16PM0.26m
2:53AM1.40m
2:32PM0.36m
5:03AM1.33m
4:09PM0.42m
rain showers
rain showers
part cloud
part cloud
rain showers
part cloud
clear
part cloud
part cloud
cloud
cloud
light rain
light rain
mod rain
rain showers
part cloud
part cloud
rain showers
light rain
rain showers
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
7:20
7:20
7:18
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:38
5:39
5:40
5:42
5:43
5:44
 mm
2
1
1
4
5
10
15
1
3
3
6
Temp °C
12
11
10
12
13
11
14
13
12
17
15
15
11
11
11
11
11
10
11
10
11
Feels °C
8
7
7
7
9
7
12
11
9
13
10
11
5
5
8
2
4
4
4
3
3
  • 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 Marengo Surf forecast

The above surf forecast table for Marengo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Marengo can be found by selecting the local surf guide option on the grey menu. Our Marengo 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 (Marengo) 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 Marengo 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.

Marengo is 93 km (58 miles) from the city of Geelong West. If you plan a holiday in Cape Otway, look for hotels and other accommodation in Geelong West. Geelong West has rooms for a wide range of budgets as well as car hire and transport links.

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