Gas Bay Surf Forecast

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

Australia (828 breaks)

Surf Forecasts:

Gas Bay surfForecast / WA – Margaret River / Australia

12 Day Weather and Surf, issued 7 pm Tuesday 26 Aug 2025 AWST

Forecast update in hr min s Forecast update imminent

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

Today's Gas Bay sea temperature is 17.9° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Gas Bay this week:

The surf forecast for Gas Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 29) at 2AM. The primary swell is predicted to be 1.9m and 10s period with a secondary swell of 0.1m and 21s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Gas Bay in the next 12 days are 4.0m 17s and forecast to arrive on Tuesday (Sep 02) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave Type	Time (AWST) & Date	Wave Height & Period
Next good surf (1 star+)	2AM (Fri 29th Aug)	6ft (1.9m) 10s
Best Surf	2AM (Sun 31st Aug)	5.5ft (1.7m) 19s
Most Powerful	2PM (Tue 2nd Sep)	13ft (4.0m) 17s

Table - best surf conditions forecast for Gas Bay 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 Wed afternoon. Very mild (max 14°C on Wed morning, min 11°C on Wed afternoon). Wind will be generally light.										Days 3-6 Weather Summary Mostly dry. Very mild (max 17°C on Mon morning, min 12°C on Sat morning). Wind will be generally light.
		Wednesday 27			Thursday 28			Friday 29			Saturday 30			Sunday 31			Monday 01			Tue 02
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	1	1	1	3	2	3	3	3	3	3	2	3	5	5	4	5	0	0	2	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SSW	SW	SW	SW	SW	SW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SW	WSW
Period(s) (?)	11	11	10	9	11	11	10	11	9	18	16	16	19	17	16	16	14	14	13	16	16
Wave Graph (?)
Energy (?)	2057	1136	915	1322	1460	1355	790	621	526	601	610	1718	3406	5400	4647	3507	2126	1743	1811	4266	7539
Wind (km/h)	SW	WNW	SW	S	S	SSE	SE	NNW	SE	ESE	N	WSW	E	NNW	NNW	NE	NW	W	WNW	NW	NW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	on	cross- on	cross- off	cross	cross- off	cross- off	glass	cross- off	off	cross	cross- on	off	cross- on	cross	cross- off	cross- on	on	on	cross- on	cross- on
High Tide / height (m)	11:20PM 0.49	10:01AM 0.41		11:24PM 0.54	9:04AM 0.38		11:41PM 0.59			12:09AM 0.61			12:51AM 0.62			2:30AM 0.62				5:35AM 0.65
Low Tide / height (m)		5:26AM 0.35	4:20PM 0.30		6:37AM 0.37	3:42PM 0.26			3:10PM 0.21			3:07PM 0.17			3:18PM 0.13			3:32PM 0.10			3:48PM 0.07

		Wednesday 27			Thursday 28			Friday 29			Saturday 30			Sunday 31			Monday 01			Tue 02
Sunrise	-	6:46	-	-	6:43	-	-	6:43	-	-	6:41	-	-	6:39	-	-	6:39	-	-	6:37	-
Sunset	-	-	5:57	-	-	5:58	-	-	5:59	-	-	6:00	-	-	6:00	-	-	6:00	-	-	6:01

Rain (mm)	2	2	3	1	-	-	-	-	2	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	13	14	12	13	13	14	14	14	14	13	14	14	14	15	16	16	17	17	17	17	17
Feels °C (?)	8	9	8	9	7	8	11	13	13	11	12	11	12	13	13	14	11	12	13	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)

Recent Eyeball Surf Reports for WA - Margaret River

Wind Update Continuing clean conditions at Gas Bay (calm at Witchcliffe 10 km from Gas Bay). 2.9m 11s groundswell from the S with a 1.8m 12s groundswell from the SW. 2 swells combining so expect closeout sets.
2 hours 16 minutes ago Gas Bay

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2 h 16 min ago

0 km/h

Clean

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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 Gas Bay 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 Gas Bay Surf forecast

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

Gas Bay is 96 km (60 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.