
Surf Forecasts:
Gunnamatta Beach surf forecast from 18 Jul 2026:
- Best quality surf: Saturday 25 Jul, 10PM (local time) - 6ft (1.9m), 12s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 24 Jul, 4PM (local time) - 13ft (4.0m), 14s period, WSW swell with 5,549 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 4AM (local time) - 3.5ft (1.1m), 13s period with SW swell.
Best Forecast Surf Conditions for Gunnamatta Beach this week:
The surf forecast for Gunnamatta Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 19) at 4AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.1m and 22s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Gunnamatta Beach in the next 16 days are 4.0m 14s and forecast to arrive on Friday (Jul 24) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Jul 22) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 19th Jul) | 3.5ft (1.1m) 13s |
| Best Surf | 10PM (Sat 25th Jul) | 6ft (1.9m) 12s |
| Most Powerful | 4PM (Fri 24th Jul) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Gunnamatta Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks. We’re focusing on one spot, and there’s a bit of a mixed bag, but there are some real gems hiding in there.
We start off with a bit of a quiet spell. The first decent session we see is on Sunday the 19th of July. The morning is looking clean at Gunnamatta Beach, with a 4ft SW swell, a 12-second period, and a light cross-offshore breeze. The combined energy is moderate (431). The afternoon is similar, holding at 3ft SW with a 12-second period, but the wind goes even lighter and more cross-off. It’s clean, but not a standout.
Monday the 20th sees the swell drop a touch, but the period jumps to a very long 16 seconds in the morning. It’s a decent 3ft SW groundswell, and the wind is cross-off, but the tide is questionable. The wave energy is moderate (547). The afternoon is smaller and more marginal.
Tuesday the 21st is the first real standout. The morning has a solid 5ft SW swell (14-second period) with a clean cross-off breeze. The combined energy is strong (813). This is a proper, clean groundswell running. The afternoon holds similar size and is also clean. This is the best on offer for the first week.
After that, the wind gets a bit ugly. From Wednesday the 22nd through to the end of July, the wind is onshore or cross-onshore, and the swell gets big and messy. On Thursday the 23rd we see a 10ft SW swell, but the wind is straight onshore from the SW at 25 mph. The energy is very strong (3264), but it’s not for paddle surfing. This setup looks more interesting for kite surfing. The same goes for Friday the 24th with a 13ft WSW swell and 25 mph cross-onshore wind – the energy is massive (10430), but it’s a blown-out mess.
The end of the first week and into the second week sees the swell dropping back. Sunday the 26th of July afternoon is worth a mention. The swell is 5ft SW (12-second period), the wind is a light cross-off shore, and the combined energy is moderate (542). The forecast is for very good surf conditions, and it’s clean. That’s a solid session.
The second week is a bit of a rollercoaster. We get a big, clean, but messy period from Monday the 27th to Tuesday the 28th, with strong winds and big swell (10ft+). Not for the faint-hearted. Then Wednesday the 29th of July afternoon is a real standout. The swell is 7ft SW (13 seconds), the wind is a light cross-off shore, and the energy is strong (1553). The forecast says excellent surf conditions for experienced surfers – this is the one to circle. It’s a big wave, so definitely for advanced crew only.
The last few days of the forecast, into August, are a bit of a letdown. The wind is onshore or cross-onshore, and the swell is smaller and inconsistent. The only real hope is the very last entry: Monday the 3rd of August morning. The swell is 4ft SW, but the period is a very long 17 seconds, and the wind is glassy. The combined energy is moderate (888). The forecast is for very good surf conditions. That’s a promising, but distant, promise.
So, to wrap it up: the best bets are Tuesday the 21st of July for the clean, fun groundswell, and Wednesday the 29th of July afternoon for the big, clean, experts-only session. Everything else is a bit of a gamble with the wind.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Sun afternoon, min 11°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Wed morning. Very mild (max 12°C on Tue night, min 8°C on Thu night). Mainly strong winds. | ||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 13 | SW 12 | SW 12 | SW 18 | SW 16 | SW 15 | WSW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SW 14 | WSW 14 | SW 14 |
Wave Graph | |||||||||||||||||||
535 | 330 | 259 | 194 | 502 | 226 | 437 | 777 | 700 | 456 | 282 | 363 | 1715 | 3264 | 3620 | 4139 | 3469 | 5549 | 3709 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on |
High Tide | 2:45AM1.60m | 3:18PM1.79m | 3:39AM1.61m | 3:56PM1.76m | 4:30AM1.59m | 4:32PM1.70m | 5:18AM1.54m | 5:07PM1.62m | 6:04AM1.48m | 5:40PM1.53m | 6:52AM1.43m | 6:13PM1.44m | |||||||
Low Tide | 8:55AM0.18m | 9:35PM0.26m | 9:41AM0.28m | 10:18PM0.20m | 10:25AM0.40m | 10:59PM0.19m | 11:07AM0.52m | 11:39PM0.22m | 11:47AM0.64m | 00:17AM0.26m | 12:29PM0.74m | 00:58AM0.32m | |||||||
— | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | |
— | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 5 | 2 | 5 | 3 | — | — | — | — | 1 |
Temp °C | 13 | 12 | 15 | 14 | 12 | 15 | 13 | 12 | 14 | 12 | 11 | 12 | 11 | 10 | 11 | 10 | 11 | 12 | 12 |
Feels °C | 11 | 8 | 12 | 10 | 7 | 11 | 9 | 7 | 10 | 6 | 5 | 6 | 4 | 0 | 2 | 3 | 2 | 4 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 12 | SW 16 | WSW 12 | WSW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 13 | — | — | SW 14 | SW 15 | SW 14 | SW 14 | SW 14 |
535 | 330 | 259 | 144 | 502 | 158 | 437 | 777 | 700 | 456 | 282 | 363 | — | — | 3620 | 4139 | 3469 | 4881 | 3709 | |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | SW 20 | SW 18 | S 16 | SW 15 | WSW 18 | SSW 14 | — | E 10 | WSW 8 | — | — | — | — | S 16 | — | — | S 15 |
— | 63 | 60 | 194 | 20 | 226 | 32 | 36 | — | 2 | 39 | — | — | — | — | 134 | — | — | 212 | |
Swell 3 Height (m) Direction Period (s) | W 22 | WSW 20 | SW 20 | SSW 11 | SSW 16 | S 10 | S 14 | — | — | — | — | — | — | — | — | — | — | — | — |
9 | 38 | 97 | 22 | 25 | 7 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 3 | NNW 3 | NNW 3 | NNW 3 | NNW 3 | N 3 | NNW 3 | WNW 4 | WSW 6 | SW 12 | SW 13 | — | — | NW 5 | WSW 14 | — |
— | — | — | 2 | 3 | 3 | 4 | 5 | 5 | 9 | 47 | 171 | 1715 | 3264 | — | — | 30 | 5549 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 5 | 9 | 5 | 5 | 5 | 5 | 37 | 37 | 46 | 49 | 473 | 60 | 45 | 77 | 77 | 46 |
Best forecast wave conditions in Mornington Peninsula | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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Information about the Gunnamatta Beach Surf forecast
The above surf forecast table for Gunnamatta Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Gunnamatta Beach can be found by selecting the local surf guide option on the grey menu. Our Gunnamatta Beach 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 (Gunnamatta Beach) 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 Gunnamatta Beach 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.
Gunnamatta Beach is 31 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.










