Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Issued: 3 pm 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
14.4° C

1.1°C warmer than normal for this time of year

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 6 Jul 2026:

  • Best quality surf: Monday 13 Jul, 4PM (local time) - 15ft (4.5m), 15s period, WSW swell with cross-onshore winds.
  • Most powerful swell: Monday 13 Jul, 7AM (local time) - 16ft (5.0m), 15s period, SW swell with 9,947 kJ wave energy.
  • Next surfable swell (1★+): Monday 6 Jul, 10PM (local time) - 4.5ft (1.3m), 14s 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 Monday (Jul 06) at 10PM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 0.3m and 5s. 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 5.0m 15s and forecast to arrive on Monday (Jul 13) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Saturday (Jul 11) at 1PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Mon 6th Jul)4.5ft (1.3m) 14s
Best Surf 4PM (Mon 13th Jul)15ft (4.5m) 15s
Most Powerful 7AM (Mon 13th Jul)16ft (5.0m) 15s

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


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here, let’s have a yarn about the surf coming up at Gunnamatta Beach.

We’ve got a solid run of swell on the way, but it’s a bit of a mixed bag for conditions. The first main window kicks off on Monday the 6th with a 5ft SW swell, a 14-second period, and glassy conditions. The water’s sitting at 58°, which is a touch warmer than average for the time of year. Clean, lined-up waves with moderate energy (823) – a real nice way to ease into the week.

Now, if you’re looking for the stand-out, Tuesday the 7th morning is the one. Swell bumps up to 5ft from the SW, period jumps to a very long 17 seconds, and we’ve got offshore NE wind. The combined energy is strong (1624), promising powerful, well-shaped sets. This is proper groundswell – for experienced surfers only, but the quality will be exceptional. Keep in mind, with that long period, it’ll be better if the tide pushes it a bit. Tuesday afternoon the wind swings SE though, so the morning session is the go.

Wednesday the 8th morning is also a cracker: offshore ENE breeze, 5ft SW swell and an 18-second period – that’s about as clean as it gets, with energy readings up at 2524. You’ll want to be on it early before the SE cross-shore kicks in later. Thursday the 9th holds clean conditions too, with a light N cross-off in the morning and glassy NE wind in the afternoon, delivering 5ft and 4ft SW swells respectively.

Friday the 10th is still good, with a consistent 5-5ft SW swell and cross-off northerly winds – clean shape and rideable all day.

Then we hit a rough patch. From Saturday the 11th right through to Monday the 20th, the wind goes feral. Strong to gale-force N and NW, with cross-off and cross-on directions blowing the surface out. Swell sizes jump up to a massive 15ft around the 13th – way too big and messy for Gunnamatta Beach. The combined energy hits 17560 on the Monday afternoon, but it’s blown out and angry. Honestly, it looks more like a kite-surfing zone that week.

There’s a glimmer of hope on Thursday the 16th – clear skies, glassy wind, and a 6ft SW swell (period 12 seconds). That afternoon session will have clean, powerful waves for experienced crew. The morning of Friday the 17th still has some clean 5ft SW swell, but the fresh NNW wind makes it less appealing.

After that, from Saturday the 18th to Tuesday the 21st, it’s back to strong winds and messy or blown-out conditions. Small swells in the 4-6ft range, but the wind ruins any chance of quality.

All in all, Gunnamatta’s best bet is the Tuesday the 7th morning session, with that long-period SW groundswell and offshore wind. Wednesday the 8th morning is a close second. After that, you’re picking through the rubble until Thursday the 16th afternoon.

Stay safe, keep an eye on that wind, and if it’s howling, don’t bother paddling out.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 13°C on Tue night, min 9°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Sat afternoon. Very mild (max 13°C on Fri afternoon, min 9°C on Thu night). Winds increasing (calm on Thu afternoon, near gales from the NNW by Sun morning).

Mon
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
3
3
4
3
4
4
4
4
4
3
4
3
4
1
0
0
0
0
0
0
0
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)
1.4
SW
14
1.2
SW
13
1.5
SW
17
1.6
SW
16
1.6
SW
15
1.6
SW
18
2.2
SW
18
1.8
SW
16
1.5
SW
15
1.3
SW
15
1.6
SW
17
1.6
SW
15
1.5
SW
15
1.4
SW
15
1.2
SW
14
1.2
WSW
14
1.7
WSW
10
1.7
SW
10
1.7
SW
11
4.5
SW
14
4.5
SW
15
Wave Graph
Metric surfscale
Energy kJ
810
503
1282
1200
1169
1606
2888
1697
1028
757
1519
1219
993
773
589
501
528
616
741
7717
9818
Wind (km/h)
5
SSW
10
NE
5
NE
5
SE
15
E
10
ENE
10
SE
15
NE
10
N
5
NE
10
N
15
N
15
N
30
N
45
N
45
NW
35
WNW
45
NNW
50
NW
50
W
50
WSW
Wind State
glassy
off
off
cross
cross-off
off
cross
off
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-on
cross-on
High Tide
4:08AM1.39m
4:25PM1.62m
4:51AM1.42m
4:55PM1.59m
5:39AM1.46m
5:27PM1.56m
6:32AM1.49m
6:05PM1.52m
7:32AM1.51m
6:51PM1.49m
8:40AM1.53m
7:47PM1.45m
9:53AM1.56m
Low Tide
10:16PM0.47m
10:05AM0.42m
10:48PM0.40m
10:44AM0.49m
11:22PM0.32m
11:27AM0.57m
00:01AM0.25m
12:16PM0.66m
00:47AM0.18m
1:13PM0.75m
1:42AM0.13m
2:20PM0.83m
2:45AM0.10m
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
mod rain
clear
cloud
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:37
7:37
7:37
7:37
7:35
7:35
7:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:12
5:12
5:13
5:14
5:14
5:15
5:15
5:15
 mm
7
4
7
3
Temp °C
12
11
10
12
13
10
12
11
10
11
11
11
13
11
13
11
10
13
13
11
11
Feels °C
10
9
8
9
9
8
8
8
8
9
8
7
9
6
4
1
3
2
3
0
0
Swell 1
Height (m)
Direction
Period (s)
1.4
SW
14
1.2
SW
13
1.5
SW
17
1.6
SW
16
1.6
SW
15
1.6
SW
18
2.2
SW
18
1.8
SW
16
1.5
SW
15
1.3
SW
15
1.6
SW
17
1.6
SW
15
1.5
SW
15
1.4
SW
15
1.2
SW
14
1.2
WSW
14
1
SW
12
1.7
SW
10
1.7
SW
11
0.6
S
15
0.5
S
16
Energy kJ
810
503
1282
1200
1169
1606
2888
1697
1028
757
1519
1219
993
773
589
501
278
616
741
159
127
Swell 2
Height (m)
Direction
Period (s)
0.5
SE
5
0.3
SW
19
0.9
SW
13
0.3
SSW
16
0.1
SW
24
1.3
SW
14
0.6
S
18
0.5
S
16
0.3
SSW
16
0.3
SSW
15
0.4
SSW
18
0.3
S
16
0.3
S
16
0.1
NE
6
0.4
SW
18
Energy kJ
13
57
282
51
22
667
222
131
47
44
107
43
42
1
114
Swell 3
Height (m)
Direction
Period (s)
0.3
SE
4
0.3
SSW
18
0.2
ESE
12
0.6
S
19
0.2
ESE
11
0.2
ESE
11
0.3
ESE
5
Energy kJ
3
60
14
251
12
11
5
Wind waves
Height (m)
Direction
Period (s)
0.5
ESE
4
0.5
N
3
1.1
N
4
1.2
NNW
5
1.7
WSW
10
1.1
NW
4
1.4
NW
5
4.5
SW
14
4.5
SW
15
Energy kJ
10
5
45
59
528
39
99
7717
9818
Nearest Offshore or Glassy
Rating
(10 max)
3
3
4
4
4
4
5
4
4
3
4
4
4
3
3
3
2
1
1
1
9
Distance (km)
0
0
0
6
0
0
14
0
0
0
0
5
0
14
76
78
45
281
490
618
49
Best forecast wave conditions in Mornington Peninsula
Rating
(10 max)
3
3
4
4
4
4
5
4
4
3
4
4
4
3
Best forecast wave conditions in Australia
Rating
(10 max)
7
8
7
5
5
7
7
5
4
4
5
4
4
4
3
4
2
4
2
9
9
Header Global
Rating
(10 max)
7
8
7
5
5
9
8
9
8
7
5
6
5
8
5
5
5
5
5
9
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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