Surf Forecasts:
Marengo surf forecast from 29 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4PM (local time) - 8ft (2.5m), 13s period, SW swell with offshore winds.
- Most powerful swell: Monday 3 Aug, 7PM (local time) - 13ft (4.0m), 12s period, SW swell with 4,491 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 10AM (local time) - 3.5ft (1.0m), 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 Thursday (Jul 30) at 10AM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 1.3m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 4.0m 12s and forecast to arrive on Monday (Aug 03) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Aug 06) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 30th Jul) | 3.5ft (1.0m) 14s |
| Best Surf | 4PM (Thu 30th Jul) | 8ft (2.5m) 13s |
| Most Powerful | 7PM (Mon 3rd Aug) | 13ft (4.0m) 12s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright mates, Rusty here. Let's break down the next couple of weeks.
We're starting right now, Thursday the 30th of July, with some clean surf on offer. The water is 58°, right where it should be for this time of year.
Thursday morning at Marengo, a reef and point break, we’ve got a clean 3ft swell from the SW. Offshore wind at 12 mph from the west is keeping it smooth. The combined swell energy is moderate at 964. A good, easy session for anyone.
Thursday afternoon the swell jumps to 8ft from the same direction, with a 13-second period. Offshore wind holds at 12 mph from the WSW. This is for experts—big, powerful, with energy at 3019. Not for the faint of heart.
Friday morning (31st July) drops to a clean 4ft from the SSW, 12-second period. Wind is almost nothing from the WNW at 3 mph—glassy. Energy is moderate (544). Nice, fun waves for all.
Friday afternoon stays clean at 4ft, SW swell, 12-second period, with a light cross-offshore breeze. Still good.
Saturday morning (1st August) we have 4ft SW swell, but a very long period of 17 seconds. Long period groundswell like this loves a point or reef, so Marengo will handle it well. Light cross-shore wind. Energy 865. Long waits, but excellent sets.
Saturday afternoon is a standout. Swell builds to 6ft, SW, still with that 17-second period, and the wind goes light cross-offshore. Energy jumps to 2764. This is powerful, clean, and perfect for experienced surfers.
Sunday morning (2nd August) offers 5ft SW groundswell at 16 seconds, moderate cross-offshore wind. Energy 1341. Still clean and punchy.
Sunday afternoon drops to 5ft, 15-second period, wind picks up to 16 mph. Surfable, but not as special.
From Monday 3rd August to Tuesday 4th August, the swell runs up and down—up to 12ft on Monday afternoon with fresh offshore wind, but shorter 13-second period and described as marginal. Big and unruly.
Wednesday morning 5th August is a little gem. Swell is only 2ft, but the period is a massive 19 seconds. Offshore wind at 9 mph from the WSW. Energy 735. Small but perfect.
Thursday 6th August morning has 4ft at 16 seconds, clean offshore. Afternoon is another standout: 8ft from the WSW, 15-second period, light cross-offshore wind, energy 3726. Serious power for the experienced.
Friday morning 7th August is the best of the entire run. 6ft SW groundswell, 15-second period, glassy offshore wind from the ESE at 3 mph. Energy 1413. This is your session. Perfect conditions, powerful, clean.
Friday afternoon gets a bumpy cross-onshore wind, so morning is the call.
The second week (8th August onwards) is patchy. Saturday 8th is messy. Sunday 9th is poor and windy. Monday 10th and Tuesday 11th have some size (5ft to 7ft) with offshore wind, but it’s windy and not that clean. Wednesday 12th and Thursday 13th are clean but average.
Friday 14th August brings one last pulse. Morning has 5ft from the SW with a huge 21-second period. Offshore wind at 19 mph, energy 2748. Very long period, very clean, very spread out sets. Afternoon jumps to 8ft at 19 seconds, energy 4063. Big, serious, and only for the dedicated.
The standout is Friday morning 7th August at Marengo—glassy, 6ft SW. Backup sessions are Saturday afternoon 1st August and Thursday afternoon 6th August. The second week is quieter, with that final Friday looking promising but not certain.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 15°C on Sat afternoon, min 9°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 14°C on Sun morning, min 9°C on Sun night). Winds decreasing (fresh winds from the WSW on Mon morning, light winds from the WSW by Tue night). | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 14 | SW 13 | SW 12 | SSW 12 | SW 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 11 | SW 11 | SW 10 | SW 20 | SW 19 | SW 18 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 357 | 2382 | 637 | 496 | 428 | 347 | 663 | 1859 | 2247 | 1314 | 988 | 924 | 802 | 4486 | 2889 | 1764 | 739 | 264 | 365 | 314 | 330 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off |
High Tide | 12:56PM1.53m | 2:00AM2.20m | 1:41PM1.64m | 2:27AM2.23m | 2:22PM1.76m | 2:52AM2.22m | 3:01PM1.86m | 3:16AM2.17m | 3:40PM1.94m | 3:40AM2.10m | 4:19PM2.00m | 4:03AM2.02m | 5:00PM2.02m | ||||||||
Low Tide | 7:06PM0.50m | 8:24AM0.87m | 7:46PM0.49m | 8:48AM0.74m | 8:23PM0.50m | 9:11AM0.61m | 8:59PM0.53m | 9:36AM0.48m | 9:35PM0.60m | 10:01AM0.36m | 10:10PM0.69m | 10:29AM0.25m | 10:47PM0.82m | ||||||||
 |  |  |  |  |  | | |  | | | |  | | | | | | | | | |
 | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — |
 | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | 2 | 2 | — | — | — | — | — | — | — | — | 1 | 2 | 4 | 3 | — | 1 | — | — | — | — |
Temp °C | 11 | 11 | 11 | 13 | 12 | 12 | 14 | 15 | 10 | 14 | 14 | 12 | 11 | 10 | 11 | 12 | 12 | 10 | 13 | 12 | 10 |
Feels °C | 6 | 6 | 8 | 10 | 10 | 10 | 11 | 12 | 6 | 9 | 9 | 6 | 3 | 3 | 5 | 6 | 7 | 6 | 7 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SW 12 | SW 12 | SSW 12 | SW 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 11 | SSW 11 | SSW 10 | SSW 9 | SW 14 | SW 13 | SW 17 |
| kJ | 308 | 423 | 637 | 496 | 428 | 347 | 663 | 1859 | 2247 | 1314 | 988 | 924 | 802 | 2031 | 1314 | 792 | 437 | 162 | 289 | 299 | 330 |
Swell 2 Height (m) Direction Period (s) | SW 14 | S 9 | SW 23 | SSW 21 | SW 20 | SW 18 | SW 12 | SW 13 | SSE 17 | SE 16 | — | SE 15 | WSW 16 | WSW 15 | WSW 13 | WSW 12 | SW 15 | SW 14 | SSW 8 | SW 18 | SW 12 |
| kJ | 357 | 169 | 21 | 45 | 134 | 162 | 202 | 905 | 27 | 10 | — | 8 | 330 | 154 | 222 | 104 | 191 | 169 | 81 | 314 | 124 |
Swell 3 Height (m) Direction Period (s) | WSW 13 | SW 13 | S 14 | S 13 | S 13 | — | — | — | — | — | — | — | — | SSW 20 | SW 17 | SW 16 | SW 12 | SW 20 | SW 19 | S 7 | SSW 8 |
| kJ | 299 | 45 | 4 | 3 | 3 | — | — | — | — | — | — | — | — | 37 | 190 | 163 | 34 | 264 | 365 | 40 | 22 |
Wind waves Height (m) Direction Period (s) | — | SW 13 | — | — | — | — | — | — | — | N 4 | NNE 4 | — | WSW 8 | SW 13 | SW 11 | SW 11 | SW 10 | — | — | — | N 3 |
| kJ | — | 2382 | — | — | — | — | — | — | — | 17 | 7 | — | 307 | 4486 | 2889 | 1764 | 739 | — | — | — | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 18 | 0 | 2 | 20 | 20 | 2 | 35 | 276 | 59 | 59 | 59 | 0 | 0 | 0 | 2 |
Best forecast wave conditions in Cape Otway | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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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