Surf Forecasts:
Gunnamatta Beach surf forecast from 4 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 10PM (local time) - 15ft (4.5m), 18s period, SW swell with onshore winds.
- Most powerful swell: Wednesday 9 Sep, 4PM (local time) - 13ft (4.0m), 19s period, SW swell with 12,621 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 7AM (local time) - 3.5ft (1.1m), 19s 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 Tuesday (Sep 08) at 7AM. The primary swell is predicted to be 1.1m and 19s period with a secondary swell of 1.6m and 13s. 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 19s and forecast to arrive on Wednesday (Sep 09) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Sep 05) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 8th Sep) | 3.5ft (1.1m) 19s |
| Best Surf | 10PM (Wed 9th Sep) | 15ft (4.5m) 18s |
| Most Powerful | 4PM (Wed 9th Sep) | 13ft (4.0m) 19s |
Table - best surf conditions forecast for Gunnamatta Beach over the next 16 days.
The Lowdown
Gunnamatta Beach is the only spot we're looking at, and it's a bit of a rollercoaster. Water temp is about 57°F – a touch above average for this time of year, so you won't need the thickest rubber.
First few days are a bust. Saturday the 5th: 8ft SW swell with a 15-second period but a nasty cross-wind at 25 mph has it all messy. Sunday the 6th is onshore and lumpy with 8ft. Monday the 7th drops to 3ft but still choppy. Zilch.
Tuesday the 8th afternoon shows a pulse – 7ft SW swell, 17-second period, light onshore breeze. It's marginal, but the energy (3046) is there. A groundswell, so it might straighten out a bit on the beach.
The big standout? Saturday the 12th of September morning. Clear skies, light NNW breeze at 3 mph giving a clean offshore cross-off. 8ft SW swell, 15-second period, energy of 2789. For experienced surfers, this is prime. Glassy, clean, proper.
Sunday the 13th is a solid follow-up – morning has 8ft SW swell with an offshore NNE breeze at 9 mph (clean). Afternoon stays clean with 7ft.
We hit a lull from Monday the 14th (dropping to 4ft and smaller). Then from Tuesday the 15th, the swell jumps to 10ft but with onshore winds and a short 9-second period – sloppy and rough.
From Thursday the 17th to Friday the 18th, it's massive groundswell – 10ft from the SW with periods up to 17 seconds and energy over 5000 (up to 5560). But it's flagged as too big for this break. For experts only, if at all.
Your best bet: Saturday the 12th and Sunday the 13th of September. Clean, solid, offshore winds. That's where it's at.
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 (near gales from the WSW on Sat night, light winds from the NW by Mon night). | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Very mild (max 12°C on Tue night, min 9°C on Tue morning). Mainly strong winds. | ||||||||||||||||||||
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 13 | SW 14 | SW 18 | SW 17 | SW 16 | SW 16 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2437 | 2268 | 2850 | 2534 | 1528 | 987 | 292 | 316 | 1218 | 995 | 2442 | 2668 | 3396 | 12621 | 11327 | 9109 | 6669 | 4117 | 2863 | 2680 | 2945 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on | on | on | glassy |
High Tide | 4:35PM1.62m | 5:48AM1.62m | 5:17PM1.57m | 6:43AM1.54m | 6:06PM1.50m | 7:49AM1.46m | 7:11PM1.41m | 9:06AM1.41m | 8:37PM1.35m | 10:22AM1.43m | 10:13PM1.36m | 11:27AM1.47m | 11:36PM1.45m | ||||||||
Low Tide | 10:50AM0.57m | 11:09PM0.05m | 11:34AM0.65m | 11:58PM0.11m | 12:25PM0.74m | 00:56AM0.20m | 1:31PM0.80m | 2:06AM0.30m | 2:56PM0.80m | 3:27AM0.37m | 4:24PM0.72m | 4:48AM0.39m | 5:35PM0.58m | ||||||||
 |  |  |  |  |  | | |  | | | |  | | | | | | | | | |
 | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — |
mm | 1 | 1 | 3 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 14 | 13 | 13 | 13 | 13 | 12 | 11 | 10 | 10 | 11 | 12 | 11 | 12 | 12 | 10 | 11 | 11 | 11 | 11 | 10 |
Feels °C | 9 | 5 | 3 | 9 | 10 | 8 | 7 | 5 | 6 | 7 | 6 | 1 | 2 | 5 | 5 | 5 | 6 | 8 | 7 | 7 | 9 |
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 17 | SW 16 | SW 16 | SSW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | SW 15 |
| kJ | 2437 | 2268 | — | 2534 | 1528 | 987 | 292 | 316 | 1218 | 790 | 2442 | 2668 | 3396 | 608 | 11327 | 9109 | 6669 | 4117 | 2863 | 2680 | 2945 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 17 | — | SW 20 | WSW 18 | — | SW 22 | SW 21 | SW 20 | SW 18 | SW 13 | SSW 16 | SW 22 | — | SSW 18 | S 18 | SSW 17 | SSW 16 | S 13 | — | SSW 16 |
| kJ | 127 | 95 | — | 15 | 31 | — | 18 | 69 | 377 | 995 | 591 | 201 | 389 | — | 692 | 646 | 482 | 259 | 130 | — | 256 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSW 15 | — | — | S 22 | S 20 | SSW 20 | SSW 18 | SSW 8 | W 26 | SSW 21 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 21 | — | — | 9 | 8 | 37 | 61 | 13 | 13 | 150 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 5 | WNW 5 | SW 10 | SSW 7 | SSW 7 | SW 6 | SW 6 | SSW 7 | — | — | — | WSW 6 | SW 9 | SW 19 | — | — | — | — | — | — | — |
| kJ | 56 | 78 | 2850 | 166 | 73 | 89 | 186 | 256 | — | — | — | 93 | 1341 | 12621 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 512 | 479 | 327 | 45 | 23 | 37 | 60 | 149 | 15 | 9 | 15 | 45 | 591 | 1360 | 37 | 49 | 281 | 14 | 17 | 23 | 0 |
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.
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