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

information circle12 Day Weather and Surf, issued 10 pm Thursday 25 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
23.0° C
(Which is slightly warmer than usual)


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 Monday (Dec 29) at 5AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.1m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Avalon-South in the next 12 days are 1.8m 13s and forecast to arrive on Wednesday (Dec 31) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 11s period and expected on Friday (Dec 26) at 2AM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 29th Dec)5.5ft (1.7m) 9s
Best Surf 5AM (Mon 29th Dec)5.5ft (1.7m) 9s
Most Powerful 5PM (Wed 31st Dec)6ft (1.8m) 13s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Some drizzle, heaviest during Thu night. Warm (max 20°C on Sun afternoon, min 15°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Tue afternoon, min 14°C on Mon night). Mainly strong winds.

Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
01
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.2
ENE
0.2
ENE
0.1
NE
0.1
NE
0.1
NE
0.1
NE
0.1
NE
0.1
NE
0.1
NE
1.7
SSE
1.6
SSE
1.1
SE
1.2
SE
1.2
SE
1.4
SE
1.2
SE
1.6
ESE
1.8
ESE
1.9
ESE
1.7
ESE
1.5
ESE
Period(s) (?)131313131313121212998881191413121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)171667666665064051532012064082379151044980753517
Wind
(km/h)
15
SSE
25
S
25
SSE
15
S
20
SSE
20
SE
20
SSW
25
S
20
SSE
10
S
10
SE
15
ESE
5
NNW
15
NE
25
NE
15
ENE
30
S
30
SSE
20
SSE
15
SSE
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
crosscrosscrosscrosscross-
on
cross-
off
crosscross-
on
crosscross-
on
onglasscross-
on
cross-
on
cross-
on
crosscrosscross-
on
cross-
on
cross-
on
High Tide
/ height (m)
1:21AM
1.10
12:58PM
1.38
2:14AM
1.16
1:51PM
1.29
3:11AM
1.25
2:55PM
1.19
4:08AM
1.35
4:08PM
1.12
5:05AM
1.46
5:23PM
1.08
6:01AM
1.57
6:35PM
1.07
6:56AM
1.68
7:39PM
1.09
Low Tide
/ height (m)
6:47AM
0.51
7:47PM
0.18
7:52AM
0.54
8:33PM
0.20
9:07AM
0.52
9:24PM
0.22
10:26AM
0.46
10:19PM
0.25
11:40AM
0.35
11:16PM
0.26
12:47PM
0.22
12:14AM
0.27
1:47PM
0.11
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
01
Sunrise-5:43--5:43--5:43--5:45--5:45--5:46--5:47-
Sunset--8:06--8:06--8:06--8:07--8:07--8:07--8:07
light rain
cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
part cloud
Rain (mm)
1--------------------
Temp. °C171617171819171920191920182124212420181818
Feels °C (?)121112131315131516161717161821182114141614
  • 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 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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