Thommos surfForecast / NSW – Illawarra / Australia

information circle12 Day Weather and Surf, issued 4 am Saturday 20 Dec 2025 AEDT
Forecast update in hr  min  s Forecast update imminent
Thommos surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thommos sea temperature is
21.7° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Thommos this week:

The surf forecast for Thommos over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 21) at 5AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.5m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thommos in the next 12 days are 1.6m 9s and forecast to arrive on Monday (Dec 22) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 9s period and expected on Thursday (Dec 25) at 5PM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 21st Dec)3ft (0.9m) 7s
Best Surf11PM (Sun 21st Dec)4.5ft (1.4m) 8s
Most Powerful 2PM (Mon 22nd Dec)5ft (1.6m) 9s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 3mm), mostly falling on Sat morning. Warm (max 31°C on Sun afternoon, min 19°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Some drizzle, heaviest during Thu morning. Warm (max 28°C on Tue afternoon, min 16°C on Tue night). Mainly fresh winds.

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
2
2
0
0
1
0
0
0
1
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.9
NE
1.3
NE
0.9
ENE
1.1
NE
1.1
NE
1.6
NE
1.6
NE
1.3
NE
1.1
NE
1
ENE
0.8
ENE
0.4
NE
0.6
NE
2.1
NE
1.1
NE
0.6
NE
0.3
NE
0.1
NE
0.2
E
0.2
ENE
0.2
E
Period(s) (?)75678899888776671313999
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6768691361292914052941491077418392978835287786
Wind
(km/h)
5
NNW
20
NNE
5
W
10
NNE
5
ESE
10
NNW
5
W
20
SE
10
SSE
5
S
35
S
5
E
15
N
10
NE
30
S
25
SSE
20
SSE
10
SSE
10
ESE
15
ENE
5
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
off
crossoncross-
off
glasscross-
on
cross-
on
glasscross-
on
cross-
on
cross-
off
crosscross-
on
cross-
on
cross-
on
cross-
on
oncross-
on
glass
High Tide
/ height (m)
9:02AM
1.54
9:47PM
1.00
9:40AM
1.56
10:27PM
1.00
10:17AM
1.55
11:07PM
1.01
10:55AM
1.53
11:49PM
1.02
11:34AM
1.49
12:34AM
1.05
12:15PM
1.43
1:23AM
1.09
1:01PM
1.36
2:15AM
1.15
Low Tide
/ height (m)
3:55PM
0.18
3:06AM
0.39
4:33PM
0.17
3:45AM
0.40
5:11PM
0.17
4:24AM
0.41
5:49PM
0.17
5:06AM
0.44
6:27PM
0.17
5:54AM
0.47
7:07PM
0.18
6:49AM
0.50
7:49PM
0.19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Sunrise5:39--5:39--5:39--5:41--5:41--5:41--5:41--
Sunset-8:06--8:07--8:07--8:07--8:07--8:07--8:08-
light rain
part cloud
part cloud
clear
cloud
rain showers
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
light rain
cloud
part cloud
part cloud
clear
clear
Rain (mm)
1----2---------1-----
Temp. °C243026303125293020262818252823191817192018
Feels °C (?)262927313326303218262614222522181414171716
  • 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 Thommos Surf forecast

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

Thommos is 20 km (12 miles) from Wollongong. If you plan a holiday in Illawarra, look for hotels and other accommodation in Wollongong. Wollongong has rooms for a wide range of budgets as well as car hire and transport links.

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