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

information circle12 Day Weather and Surf, issued 10 pm Monday 08 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
22.5° C
(Which is 1.2°C warmer than normal for this time of year)


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 Tuesday (Dec 09) at 5AM. The primary swell is predicted to be 1.6m and 7s period with a secondary swell of 1.4m and 7s. 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 1.2m 12s and forecast to arrive on Friday (Dec 12) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Dec 10) at 5AM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 9th Dec)5ft (1.6m) 7s
Best Surf11PM (Fri 12th Dec)6ft (1.9m) 7s
Most Powerful11AM (Fri 12th Dec)4ft (1.2m) 12s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 12mm), heaviest on Thu morning. Warm (max 26°C on Tue morning, min 18°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 31mm), heaviest during Sat night. Warm (max 26°C on Sun afternoon, min 18°C on Fri night). Winds increasing (calm on Sat morning, fresh winds from the SSW by Sat night).

Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Mon
15
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
1
0
0
0
0
0
0
0
0
0
1
2
1
0
0
1
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.5
NE
1
ENE
1
ENE
0.8
ENE
0.7
NE
1.1
S
1.3
S
1.4
S
1.3
SSE
0.5
E
1.2
E
1.2
E
1
E
1.2
E
0.9
E
1.1
ENE
1
S
0.7
E
0.9
ENE
0.8
ENE
1.5
SSE
Period(s) (?)766666566131212121111767776
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1988573473983971161068844640928633518212867498269141
Wind
(km/h)
10
NNE
5
ESE
20
ENE
25
SSW
20
S
15
SE
25
S
20
S
25
S
5
NE
10
ENE
10
ENE
5
W
10
NE
20
NE
15
S
10
NW
20
ENE
30
SSW
20
SSE
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossglassoncross-
off
cross-
off
cross-
on
crosscrosscrosscross-
on
ononglasscross-
on
cross-
on
crosscross-
off
cross-
on
cross-
off
crosscross-
on
High Tide
/ height (m)
12:26AM
1.07
12:14PM
1.62
1:25AM
1.07
1:08PM
1.48
2:25AM
1.09
2:04PM
1.33
3:25AM
1.14
3:02PM
1.20
4:21AM
1.20
4:04PM
1.09
5:10AM
1.27
5:05PM
1.02
5:53AM
1.34
6:02PM
0.98
Low Tide
/ height (m)
5:43AM
0.40
7:13PM
0.10
6:43AM
0.47
8:05PM
0.17
7:51AM
0.54
8:54PM
0.24
9:06AM
0.57
9:41PM
0.29
10:22AM
0.56
10:25PM
0.33
11:31AM
0.52
11:07PM
0.36
12:28PM
0.45
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Mon
15
Sunrise-5:37--5:37--5:37--5:37--5:37--5:37--5:37-
Sunset--7:55--7:55--7:57--7:58--7:59--7:59--8:00
clear
clear
clear
cloud
cloud
part cloud
thunderstorm
light rain
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
part cloud
mod rain
part cloud
clear
part cloud
light rain
light rain
Rain (mm)
------45311452--9---11
Temp. °C202626221921211920202119192324222226231817
Feels °C (?)172725231722241818212118192422242327241514
  • 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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