Avalon-South surfForecast / NSW – Sydney North Coast / Australia

information circle12 Day Weather and Surf, issued 4 am Saturday 20 Dec 2025 AEDT
Forecast update in hr  min  s Forecast update imminent
Avalon-South surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Avalon-South sea temperature is
21.8° C
(Which is slightly cooler than normal)


Best Forecast Surf Conditions for Avalon-South this week:

The surf forecast for Avalon-South over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 20) at 8AM. The primary swell is predicted to be 0.9m and 7s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Avalon-South in the next 12 days are 2.3m 8s and forecast to arrive on Thursday (Dec 25) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 10s period and expected on Thursday (Dec 25) at 11AM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sat 20th Dec)3ft (0.9m) 7s
Best Surf 2AM (Mon 22nd Dec)5ft (1.5m) 8s
Most Powerful 8AM (Thu 25th Dec)7.5ft (2.3m) 8s

Table - best surf conditions forecast for Avalon-South over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 34°C on Sun afternoon, min 20°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Tue afternoon, min 17°C on Thu night). Mainly fresh winds.

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
0
0
2
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.9
NE
0.9
NE
1.3
NE
1.1
NE
1.1
NE
1.5
NE
1.5
NE
1.2
NE
0.9
NE
0.6
NE
0.9
ENE
1.8
SSE
0.2
NNE
1.6
NE
1.1
NE
0.4
NE
0.1
NE
0.2
SSE
0.3
ENE
0.2
E
0.4
NE
Period(s) (?)777778998887155661311696
Wave
Graph
(?)Metric surfscale
Energy kJ (?)67671401261262893512251074896328211248013711779
Wind
(km/h)
10
ESE
15
NE
0
E
10
NNE
20
NE
5
WSW
15
W
10
E
20
S
5
S
15
SSE
10
SE
15
NE
30
NE
30
SSW
20
SSE
20
SE
10
SE
10
ESE
15
E
5
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
glasscrosscross-
on
glassoffoncrosscrosscross-
on
cross-
on
cross-
on
cross-
on
cross-
off
cross-
on
cross-
on
cross-
on
ononon
High Tide
/ height (m)
9:02AM
1.58
9:44PM
1.01
9:39AM
1.59
10:24PM
1.02
10:16AM
1.58
11:04PM
1.02
10:54AM
1.56
11:46PM
1.03
11:32AM
1.52
12:31AM
1.06
12:12PM
1.46
1:21AM
1.10
12:58PM
1.38
2:14AM
1.16
Low Tide
/ height (m)
3:54PM
0.19
3:05AM
0.38
4:32PM
0.18
3:43AM
0.39
5:09PM
0.17
4:22AM
0.41
5:47PM
0.17
5:04AM
0.44
6:25PM
0.17
5:51AM
0.48
7:05PM
0.17
6:47AM
0.51
7:47PM
0.18
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Sunrise5:39--5:39--5:41--5:41--5:41--5:41--5:43--
Sunset-8:02--8:02--8:04--8:04--8:05--8:05--8:06-
cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
cloud
cloud
part cloud
clear
part cloud
Rain (mm)
---------------------
Temp. °C262725313426312822262820232421201818192018
Feels °C (?)262825313428313021262817222120171416171716
  • 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 Avalon-South Surf forecast

The above surf forecast table for Avalon-South provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Avalon-South can be found by selecting the local surf guide option on the grey menu. Our Avalon-South 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 (Avalon-South) 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 Avalon-South 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.

Avalon-South is 13 km (8 miles) from Dee Why. If you plan a holiday in Sydney North Coast, look for hotels and other accommodation in Dee Why. Dee Why has rooms for a wide range of budgets as well as car hire and transport links.

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