Thommos Surf Forecast

/ NSW – Illawarra (42 breaks) / New South Wales (297 breaks) /

Australia (828 breaks)

Surf Forecasts:

Thommos surfForecast / NSW – Illawarra / Australia

12 Day Weather and Surf, issued 3 pm Thursday 18 Sep 2025 AEST

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 19.0° C
(Which is 1.3°C warmer than 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 Friday (Sep 19) at 1AM. The primary swell is predicted to be 1.1m and 6s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Thommos in the next 12 days are 1.2m 6s and forecast to arrive on Saturday (Sep 20) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 9s period and expected on Tuesday (Sep 23) at 7AM.

Wave Type	Time (AEST) & Date	Wave Height & Period
Next good surf (1 star+)	1AM (Fri 19th Sep)	3.5ft (1.1m) 6s
Best Surf	1AM (Fri 19th Sep)	3.5ft (1.1m) 6s
Most Powerful	4AM (Sat 20th Sep)	4ft (1.2m) 6s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Mostly dry. Warm (max 23°C on Fri afternoon, min 9°C on Sat night). Wind will be generally light.											Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Mon night. Warm (max 20°C on Sun afternoon, min 9°C on Mon night). Winds increasing (calm on Mon morning, strong winds from the SSW by Tue morning).
	Thu 18		Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	0	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ESE	ESE	ESE
Period(s) (?)	7	6	7	6	6	6	6	7	8	8	7	7	9	8	8	9	9	9	7	9	9
Wave Graph (?)
kJ (?)	18	75	85	68	50	46	18	17	30	20	13	13	20	26	12	16	15	15	53	103	48
Wind (km/h)	NE	WNW	NNW	NW	NNW	W	WSW	W	W	WSW	W	SW	WSW	SW	SSW	SSW	SW	S	SE	WNW	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	off	cross- off	off	cross- off	cross- off	cross- off	off	off	cross- off	cross- off	cross- off	cross- off	cross- off	cross	cross	cross- off	cross	cross- on	off	cross- on
High Tide / height (m)	5:48PM 1.48		6:36AM 1.14	6:34PM 1.49		7:13AM 1.22		7:14PM 1.47	7:47AM 1.29		7:52PM 1.44	8:18AM 1.35		8:27PM 1.38	8:49AM 1.39		9:03PM 1.30	9:21AM 1.40		9:38PM 1.21	9:53AM 1.40
Low Tide / height (m)		12:32AM 0.17	12:15PM 0.35		1:08AM 0.15	1:00PM 0.29		1:40AM 0.15		1:42PM 0.25	2:09AM 0.16		2:21PM 0.23	2:38AM 0.19		3:00PM 0.23	3:05AM 0.24		3:38PM 0.25	3:33AM 0.30

	Thu 18		Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
Sunrise	-	-	5:50	-	-	5:48	-	-	5:48	-	-	5:47	-	-	5:45	-	-	5:43	-	-	5:41
Sunset	5:49	-	-	5:49	-	-	5:50	-	-	5:51	-	-	5:51	-	-	5:52	-	-	5:52	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	8	1	-	-	-	-	-	-
Temp. °C	17	14	22	23	19	19	18	12	20	20	14	19	19	10	12	14	12	16	15	12	18
Feels °C (?)	13	13	18	22	15	12	12	7	17	16	9	16	15	4	3	5	5	12	12	10	15

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for NSW - Illawarra

Wind Update The wind is still cross-on at Thommos (light winds from the SSE at FlyStanwell 5 km from Thommos). 0.6m 7s swell from the ENE to make surfable waves.
1 hour 12 minutes ago Thommos

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1 h 12 min ago

11 km/h

SSE

Cross-On

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thommos surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

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.