Big Rock Surf Forecast

/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /

Australia (828 breaks)

Surf Forecasts:

Big Rock surfForecast / WA – Margaret River / Australia

12 Day Weather and Surf, issued 1 pm Thursday 30 Oct 2025 AWST

Forecast update in hr min s Forecast update imminent

Big Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Big Rock sea temperature is 19.9° C
(Which is 2.1°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Big Rock this week:

The surf forecast for Big Rock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Nov 02) at 5AM. The primary swell is predicted to be 3.0m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big Rock in the next 12 days are 3.0m 17s and forecast to arrive on Tuesday (Nov 04) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Monday (Nov 03) at 11PM.

Wave Type	Time (AWST) & Date	Wave Height & Period
Next good surf (1 star+)	5AM (Sun 2nd Nov)	10ft (3.0m) 12s
Best Surf	5AM (Sun 2nd Nov)	10ft (3.0m) 12s
Most Powerful	8AM (Tue 4th Nov)	10ft (3.0m) 17s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Moderate rain (total 10mm), heaviest on Fri afternoon. Very mild (max 19°C on Fri morning, min 13°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri night, light winds from the SSE by Sun morning).											Days 3-6 Weather Summary Mostly dry. Warm (max 20°C on Tue afternoon, min 10°C on Sun night). Winds increasing (light winds from the N on Mon morning, strong winds from the SSE by Tue afternoon).
	Thu 30		Friday 31			Saturday 01			Sunday 02			Monday 03			Tuesday 04			Wednesday 05
	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	0	0	0	0	0	0	4	2	1	4	2	2	3	3	3	4	2	1	2	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SW
Period(s) (?)	12	13	15	14	12	12	12	12	12	12	12	11	20	18	17	16	15	14	14	13	13
Wave Graph (?)
kJ (?)	2380	2995	3753	5444	4652	4500	3858	3352	2310	1546	889	485	653	4175	5671	4724	3051	2099	1722	1730	1518
Wind (km/h)	WNW	NW	NW	W	WSW	SW	SSW	SSE	SSW	S	E	N	SSW	SE	SSE	SSE	SSE	S	SSW	SSW	S
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	on	cross- on	cross- on	cross- on	cross- off	cross	cross	off	cross	cross	cross- off	cross- off	cross- off	cross- off	cross	cross	cross	cross
High Tide / height (m)		10:37PM 4:22AM 0.66 0.65			9:10PM 0.61	6:53AM 0.61		8:37PM 0.61	8:20AM 0.57		8:29PM 0.64	9:38AM 0.53		8:33PM 0.70	11:09AM 0.49		8:46PM 0.76			9:03PM 0.83
Low Tide / height (m)		2:15AM 0.64	1:35PM 0.30		2:05AM 0.53	1:57PM 0.33		2:40AM 0.41		2:12PM 0.38	3:22AM 0.30		2:14PM 0.43	4:08AM 0.20	1:49PM 0.47		4:59AM 0.14				5:56AM 0.11

	Thu 30		Friday 31			Saturday 01			Sunday 02			Monday 03			Tuesday 04			Wednesday 05
Sunrise	-	-	5:20	-	-	5:20	-	-	5:18	-	-	5:18	-	-	5:16	-	-	5:16	-	-	5:15
Sunset	6:45	-	-	6:45	-	-	6:46	-	-	6:47	-	-	6:49	-	-	6:50	-	-	6:51	-	-

Rain (mm)	1	3	1	3	2	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	18	18	19	19	16	15	15	15	16	17	14	18	17	15	19	20	16	16	16	16	16
Feels °C (?)	13	14	13	13	9	8	9	8	11	11	9	15	14	10	12	13	9	11	10	12	12

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 Big Rock Surf forecast

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

Big Rock is 85 km (53 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.