Surf Forecasts:
Gunnamatta Beach surf forecast from 14 Aug 2026:
- Best quality surf: Friday 21 Aug, 7PM (local time) - 10ft (3.0m), 14s period, WSW swell with cross-shore winds.
- Most powerful swell: Saturday 22 Aug, 7AM (local time) - 11ft (3.5m), 13s period, WSW swell with 4,519 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 10AM (local time) - 8ft (2.5m), 15s 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 Saturday (Aug 15) at 10AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.6m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Gunnamatta Beach in the next 16 days are 3.5m 13s and forecast to arrive on Saturday (Aug 22) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Monday (Aug 17) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 15th Aug) | 8ft (2.5m) 15s |
| Best Surf | 7PM (Fri 21st Aug) | 10ft (3.0m) 14s |
| Most Powerful | 7AM (Sat 22nd Aug) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Gunnamatta Beach over the next 16 days.
The Lowdown
Alright, Rusty here, breakin’ down Gunnamatta Beach for the next 16 days. Water temp is about 56 °F, right where it should be for this time of year – a good 4/3 wetsuit is your friend.
We kick off with a heavy, clean start. Saturday the 15th, morning session, is a screamer – 2.5m SW groundswell with a 15-second period, pumping energy (combined energy of 3178). The wind is dead glassy, so it’s going to be smooth, powerful, and pitching. This is expert-only stuff, and crowds are often a factor here, so get in early.
Sunday the 16th is another good one. Swell drops to 1.8m, still SW, 14-second period, with a light, clean cross-off breeze from the east. Solid, surfable, and less intense.
Monday the 17th is smaller at 1.6m, but still clean with a cross-off wind. Tuesday the 18th is a real treat: 1.3m SW swell, but with a gentle offshore wind from the NE, making for smooth, tidy lines. Perfect for a fun session.
Then we hit a flat, windy spell. Wednesday the 19th through Friday the 21st, the swell drops under 1m and the wind is howling from the north, making it choppy and poor. A few days off.
Saturday the 22nd the swell jumps back to 3.0m, but with a strong onshore wind, it’s a blown-out mess. This is kite-surfing territory, not for the paddle crew.
Sunday the 23rd gets even bigger, 3.5m, but the wind is cross and strong, creating a lumpy, cross-chop. Too big and ugly.
The 24th, 25th, and 26th stay big and messy – onshore winds, choppy, not worth paddling out.
Now, the long-range promise. Thursday the 27th has a massive 6.0m SSW swell, but with a light onshore breeze, it’s a terrifying wall of water. Friday the 28th is a bit smaller at 4.5m, but with a glassy offshore wind – huge, clean, and only for the nuts.
The real standout is Saturday morning, the 29th. Swell at 2.5m, but it’s a very long 19-second period SW groundswell, with a gentle offshore breeze. The energy is pumping (4800) and it’ll be clean, powerful, and lined up. That’s your best bet, but it’s a long-range call. Sunday the 30th also looks good with 1.9m and clean winds.
The pick of the run: the early Saturday sessions on the 15th and the 29th. The 29th is the one to circle.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Mon afternoon, min 10°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the E by Mon afternoon). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Wed afternoon. Very mild (max 16°C on Tue afternoon, min 9°C on Thu night). Winds increasing (light winds from the NNE on Tue morning, strong winds from the N by Wed afternoon). | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 14 | SW 15 | SW 14 | SW 18 | SW 16 | WSW 13 | WSW 16 | SW 14 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2982 | 2516 | 1855 | 1336 | 1139 | 911 | 885 | 1474 | 1246 | 667 | 621 | 532 | 305 | 239 | 169 | 157 | 314 | 362 | 1199 | 597 | 3823 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross | cross | on |
High Tide | 1:31PM1.69m | 1:42AM1.60m | 2:12PM1.73m | 2:35AM1.65m | 2:50PM1.73m | 3:23AM1.67m | 3:25PM1.71m | 4:06AM1.65m | 3:58PM1.67m | 4:46AM1.61m | 4:30PM1.60m | 5:26AM1.54m | 5:01PM1.53m | ||||||||
Low Tide | 7:42PM0.38m | 7:54AM0.24m | 8:27PM0.25m | 8:40AM0.28m | 9:08PM0.17m | 9:22AM0.35m | 9:47PM0.13m | 10:01AM0.43m | 10:23PM0.14m | 10:37AM0.52m | 10:58PM0.19m | 11:12AM0.62m | 11:33PM0.25m | ||||||||
 | |  |  | |  | |  | | | |  | |  |  | | | | | | | |
 | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — |
 | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | — | — | — | — | 1 | 5 |
Temp °C | 12 | 13 | 14 | 12 | 13 | 13 | 13 | 15 | 14 | 15 | 16 | 16 | 14 | 14 | 14 | 13 | 14 | 13 | 13 | 15 | 12 |
Feels °C | 10 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 13 | 12 | 12 | 5 | 5 | 9 | 9 | 11 | 10 | 9 | 10 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 14 | SW 15 | SW 14 | WSW 14 | SW 16 | WSW 13 | WSW 16 | SW 9 | — |
| kJ | 2982 | 2516 | 1855 | 1336 | 1139 | 911 | 885 | 1474 | 1246 | 667 | 621 | 532 | 305 | 239 | 169 | 121 | 314 | 362 | 1199 | 249 | — |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 16 | S 14 | SSW 14 | — | — | ESE 4 | SSW 17 | SSW 15 | SW 18 | ESE 5 | SE 4 | ESE 7 | SE 7 | SW 20 | SW 18 | WSW 13 | SW 16 | SW 20 | SW 14 | — |
| kJ | 196 | 193 | 150 | 104 | — | — | 8 | 57 | 44 | 307 | 6 | 4 | 5 | 2 | 60 | 157 | 109 | 211 | 97 | 597 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 11 | — | ESE 5 | — | E 4 | SW 16 | S 16 | ESE 6 | E 6 | S 16 | — | S 16 | SW 18 | — |
| kJ | — | — | — | — | — | — | — | 25 | — | 11 | — | 15 | 9 | 5 | 4 | 1 | 20 | — | 20 | 449 | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | — | ESE 5 | SE 5 | — | SE 4 | ESE 5 | — | — | NNE 2 | NNE 4 | N 4 | N 3 | N 4 | N 4 | — | WSW 12 | WNW 4 | SW 12 |
| kJ | — | — | 5 | — | 10 | 25 | — | 16 | 34 | — | — | 1 | 28 | 16 | 8 | 24 | 28 | — | 380 | 34 | 3823 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 23 | 23 | 0 | 23 | 0 | 6 | 25 | 25 | 0 | 0 | 0 | 34 | 76 | 37 | 17 | 5 | 5 | 5 | 17 | 281 |
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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