Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Gunnamatta Beach Surf Forecast and Surf Report

Issued: 9 pm 27 Jul 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
13.9° C
0.8° 

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 27 Jul 2026:

  • Best quality surf: Friday 31 Jul, 7PM (local time) - 4.5ft (1.4m), 12s period, SW swell with glassy winds.
  • Most powerful swell: Wednesday 29 Jul, 7AM (local time) - 16ft (5.0m), 16s period, SW swell with 12,706 kJ wave energy.
  • Next surfable swell (1★+): Friday 31 Jul, 7PM (local time) - 4.5ft (1.4m), 12s 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 Friday (Jul 31) at 7PM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.5m and 20s. 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 5.0m 16s and forecast to arrive on Wednesday (Jul 29) 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 1.5m 5s period and expected on Tuesday (Jul 28) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Fri 31st Jul)4.5ft (1.4m) 12s
Best Surf 7PM (Fri 31st Jul)4.5ft (1.4m) 12s
Most Powerful 7AM (Wed 29th Jul)16ft (5.0m) 16s

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


The Lowdown

Alright, Rusty here. Let's chew the fat on what's coming up over the next couple of weeks.

We're looking at a pretty wild ride to start, with a massive storm swell hitting mid-week. The raw power is there, but it's gonna be a battle with the wind, so you'll have to pick your moments. The real standout, the one that's got my heart racing, is a day of absolute perfection right at the end of the first week into the second.

The first few days are a write-off for a clean paddle. Tuesday the 28th of July is a no-go with 31 mph winds on a 5 ft to 6 ft SW swell. It carries into Wednesday the 29th with a beast of a swell – we're talking 16 ft on Wednesday morning with a near gale onshore wind. The combined energy is a massive 11,922 (very strong wave energy). That's not for surfing; that's for a survival exercise. Thursday the 30th is still messy with a 8 ft WSW swell and choppy cross-on wind. Friday the 31st of July is the first time it starts to look more human. The swell drops to 5 ft, but it's still a bit choppy in the morning. The afternoon is better, with a light 5 ft SW swell and a 3 mph SSW wind that's basically glassy. The water temp is about average for the time of year.

Now, Saturday the 1st of August. The morning is small, only 3 ft, with a very long 18-second period from the SW. That long period is a sign of quality groundswell, but it's small. The afternoon is the real story here: the swell jumps to 7 ft from the SW, still with a long 17-second period, and the wind is a clean offshore from the N. This is a solid window, but the real gem is still to come.

The absolute standout session is Tuesday the 4th of August. The morning is nice and clean with a 5 ft SW swell, but the afternoon is where it's at. The waves drop to 2 ft, but the period stretches out to a ridiculous 22 seconds from the SW. The combined energy is a moderate 1,019 and the wind is a light breeze from the E, keeping it glassy. This is a classic clean, long-period groundswell that will wrap in beautifully. It's a session for the connoisseur, not the crowd-chaser, though it is exposed so it'll pick up that energy.

Wednesday the 5th of August and Thursday the 6th of August offer more clean, cross-off conditions with 6 ft and 4 ft SW swells respectively. Then, Friday the 7th of August is another all-timer. The morning sees a 5 ft SW swell with a 16-second period under a clean offshore. But the afternoon... Friday afternoon is glassy. The swell is 4 ft with a 23-second period, and the wind is dead calm. That's a recipe for perfection.

After that, the wind picks up again on the weekend of the 8th and 9th, making it a bit bumpy despite the clean look. The second week gets a bit messy. Sunday the 9th of August has rain and onshore wind, and the following week sees a return of big swell and strong wind. Monday the 10th of August has a 8 ft SW swell, but the afternoon is a 12 ft SW swell that is simply too big for this beach break. The 11th and 12th are back to messy, strong onshore winds and big, unruly swell.

So, to sum it up: the first few days are a stormy mess. The clear winner is the glassy, long-period goodness on the afternoon of Tuesday the 4th of August, and the glassy perfection of Friday the 7th of August. The weekend of the 1st and 2nd of August is also worth a look for the cleaner conditions. After that, it's a roll of the dice again.

Rusty.

Short Range Forecast

Heavy rain (total 20mm), heaviest during Tue afternoon. Very mild (max 15°C on Tue morning, min 6°C on Tue night). Winds decreasing (near gales from the WSW on Tue night, moderate winds from the WSW by Wed night).

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Thu night. Very mild (max 14°C on Sat afternoon, min 8°C on Sat morning). Winds increasing (calm on Fri afternoon, strong winds from the NNW by Sat night).

Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
1
2
3
2
2
3
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
13
1.6
SW
13
1.9
SW
15
2.5
SW
14
5
SW
16
4
SW
15
3
SW
14
2.5
WSW
13
2.3
SW
13
1.8
SW
12
1.6
SW
12
1.5
SW
12
1.3
SW
12
1.3
SW
12
2
SW
17
2.4
SW
17
1.9
SW
16
1.7
SW
16
1.8
SW
15
Wave Graph
Metric surfscale
Energy kJ
905
865
1547
2405
11922
7822
3949
2021
1729
929
683
593
528
432
2300
3325
1878
1456
1343
Wind (km/h)
45
N
50
NNW
45
NW
45
WNW
55
WSW
45
SW
30
SW
25
W
30
WSW
15
SW
15
W
5
SSW
10
NNE
15
N
25
N
30
NNW
35
NW
30
WSW
20
SSW
Wind State
cross-off
cross-off
cross
cross
on
on
on
cross-on
on
on
cross-on
on
cross-off
cross-off
cross-off
cross-off
cross
cross-on
on
High Tide
11:00AM1.35m
9:41PM1.19m
12:00PM1.41m
10:59PM1.20m
12:48PM1.48m
00:06AM1.23m
1:27PM1.54m
1:02AM1.29m
2:01PM1.59m
1:50AM1.36m
2:31PM1.63m
2:33AM1.42m
Low Tide
3:37AM0.43m
4:49PM0.94m
4:41AM0.42m
6:00PM0.88m
5:41AM0.40m
6:54PM0.80m
6:33AM0.37m
7:36PM0.70m
7:18AM0.34m
8:12PM0.59m
7:59AM0.34m
8:45PM0.49m
part cloud
cloud
light rain
rain showers
rain showers
light rain
light rain
rain showers
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
clear
light rain
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
7:24
7:24
7:22
7:22
7:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:27
5:28
5:29
5:30
5:30
5:31
 mm
3
7
2
1
4
1
2
4
2
1
Temp °C
12
15
13
10
12
11
11
11
12
12
11
11
11
11
14
11
10
11
11
Feels °C
3
6
4
-3
1
1
2
4
5
8
8
9
9
6
7
5
2
3
5
  • Map Icons:
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  • 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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