Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Gunnamatta Beach Surf Forecast and Surf Report

Issued: 3 pm 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
14.2° C
0.9° 

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


Gunnamatta Beach surf forecast from 12 Jul 2026:

  • Best quality surf: Monday 13 Jul, 10PM (local time) - 16ft (5.0m), 15s period, WSW swell with cross-onshore winds.
  • Most powerful swell: Monday 13 Jul, 10PM (local time) - 16ft (5.0m), 15s period, WSW swell with 11,058 kJ wave energy.
  • Next surfable swell (1★+): Monday 13 Jul, 10PM (local time) - 16ft (5.0m), 15s period with WSW 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 Monday (Jul 13) at 10PM. The primary swell is predicted to be 5.0m and 15s period with a secondary swell of 4.5m and 16s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Gunnamatta Beach in the next 16 days are 5.0m 15s and forecast to arrive on Monday (Jul 13) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Jul 19) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Mon 13th Jul)16ft (5.0m) 15s
Best Surf10PM (Mon 13th Jul)16ft (5.0m) 15s
Most Powerful10PM (Mon 13th Jul)16ft (5.0m) 15s

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


Gunnamatta Beach, it’s a bit of a mixed bag for the next couple of weeks. The first few days are a write-off with strong winds and messy, blown-out conditions, so we’re looking at a gap of about 4 days with no real surf to speak of. The real action starts to build from Thursday the 16th onwards, and there’s some solid groundswell on the way.

The first standout is Thursday the 16th afternoon. After a few days of punishment, the wind drops right out and goes glassy, and we’ve got a clean 7ft SW swell rolling in at 15 seconds. That’s proper groundswell energy, and the combined energy is sitting at 2212 (moderate-strong), so there’s some push behind it. The water temp is about 58°F, which is pretty normal for this time of year, nothing weird going on there. This one’s for the experienced crew – it’s not a beginner wave at that size.

Friday the 17th is the pick of the bunch. Morning sees a light NNW cross-off breeze with a 8ft SW swell at 16 seconds, and the combined energy is up at 2870 (strong). The afternoon goes dead glassy with a 7ft SW swell at 16 seconds. This is textbook, clean, lined-up surf. Gunnamatta Beach is a classic exposed beach break, so with that long period (16 seconds) it might be a bit straighter on the shore, but when it’s clean like this, it’s a session to remember. Crowds are often here, so expect company.

Saturday the 18th holds clean with a north breeze and dropping swell – 5ft in the morning, 5ft in the afternoon, both SW and still decent period. The energy drops into the hundreds (961 and 632) but it’s clean and fun for the weekend.

After that, there’s a few average days, but the next real standout rolls in on Friday the 24th morning. We’ve got a very long period SSW groundswell at 20 seconds, but only 3ft. The combined energy is 757 (moderate), so it’s not a lot of water moving, but that period is incredible. Clean, light cross-off wind. That’s a point break or reef wave kind of day, not a beach break power session, but for a snapper or a patient surfer, it’s a treat.

Then Saturday the 25th afternoon brings another solid offering: 7ft SW swell at 16 seconds, clean with a light north cross-off breeze, energy at 2174 (strong). That’s another excellent day for experienced surfers. The week after that looks a bit messy again with lumpy cross-shore winds, so the sweet spot is definitely the 16th through the 25th.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Sun afternoon. Very mild (max 14°C on Mon morning, min 9°C on Wed morning). Winds decreasing (strong winds from the NW on Sun night, light winds from the W by Wed morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 14°C on Thu afternoon, min 9°C on Fri night). Wind will be generally light.

Sun
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
!
0
0
0
2
0
2
2
4
4
4
4
4
3
3
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
WSW
13
3
SW
13
3.5
SW
15
3.5
SW
16
4.5
WSW
15
3.5
SW
16
4
WSW
15
3.5
SW
15
2.5
SW
14
2.3
SW
14
2.1
SW
14
2.1
SW
14
2.2
SW
15
2.2
SW
15
2.3
SW
16
2.1
SW
16
1.9
SW
14
1.6
SW
14
1.4
SW
13
1.1
SW
13
1
SW
13
Wave Graph
Metric surfscale
Energy kJ
3141
3122
5495
6490
9124
5788
6482
4422
2708
2065
1618
1804
2038
2010
2702
2157
1500
961
632
431
321
Wind (km/h)
40
WNW
40
NW
45
NW
45
WNW
35
NW
35
WNW
25
WNW
25
WSW
15
WNW
20
SW
15
WSW
10
WNW
5
SW
5
SSE
10
NNW
0
NE
10
NNE
10
N
5
N
15
N
20
N
Wind State
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross
on
on
cross-on
glassy
glassy
cross-off
glassy
off
cross-off
cross-off
cross-off
cross-off
High Tide
7:47PM1.45m
9:53AM1.56m
8:55PM1.43m
11:04AM1.61m
10:11PM1.43m
12:08PM1.67m
11:29PM1.47m
1:04PM1.73m
00:41AM1.52m
1:53PM1.78m
1:46AM1.57m
2:37PM1.80m
2:45AM1.60m
Low Tide
2:45AM0.10m
3:36PM0.85m
3:54AM0.08m
4:53PM0.82m
5:03AM0.05m
6:04PM0.74m
6:09AM0.04m
7:05PM0.61m
7:10AM0.05m
8:00PM0.47m
8:05AM0.10m
8:49PM0.35m
8:55AM0.18m
light rain
light rain
part cloud
light rain
light rain
rain showers
clear
part cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:35
7:35
7:35
7:33
7:33
7:33
7:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:15
5:15
5:16
5:16
5:17
5:19
5:20
5:20
 mm
3
1
1
3
1
Temp °C
13
13
14
14
13
13
14
13
11
13
13
13
14
14
11
11
11
10
14
13
12
Feels °C
5
3
5
5
6
6
8
6
9
9
9
10
13
13
9
10
10
7
11
10
7
  • 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 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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