Carnac Island

Island Protected island off Perth home to Australian sea lions

A small nature reserve off Fremantle, Carnac Island hosts sea lions, seabirds and rocky reefs; day trips and snorkeling boats bring visitors from Perth for wildlife encounters.

Main image

Carnac Island is a small, uninhabited island off the coast of Fremantle in Western Australia, protected as a nature reserve. It is known for its coastal vegetation and for native marine wildlife.

The island is a focus for wildlife viewing, with commonly seen sea lions and seabirds; there are no permanent facilities and visitors normally arrive on commercial boat tours or private craft. Overnight stays are not permitted under reserve management rules.

The island has been managed for conservation and public safety, and landing is regulated to protect wildlife and habitats. Beaches, rocky shorelines and shallow reefs around the island are used for short shore visits and snorkelling by licensed operators.

Carnac Island lies in the Indian Ocean off the Fremantle coast, within sight of the Perth metropolitan coastline and reached by a relatively short boat trip from Fremantle.

  • Wildlife viewing: Popular destination for day boat trips and wildlife viewing from the water, particularly for Australian sea lions and seabirds.
  • Access and facilities: There are no visitor facilities on the island; landings are managed because it is a protected nature reserve, so most visits occur via licensed tours from Fremantle.
Carnac Island
-32.1241, 115.6649
Free (parked boat or tour fees may apply)

Best Time to Visit Carnac Island #

Weather & Climate near Carnac Island #

Climate

Subtropical climate with warm summers (peaking in February) and cool winters (coldest in August). Temperatures range from 10°C to 27°C. Moderate rainfall (742 mm/year) with a pronounced dry season.

Temperature & Rainfall
Temperature Range
27°
Warmest Month
10°
Coldest Month
Monthly Conditions

January

January is mild with highs of 27°C and lows of 19°C. Light rainfall.

Comfort

23°
Feels Like Mild
23°C
Temperature
19° 27°

Weather

11 mm
Rainfall
5.9 m/s
Wind
Light Breeze

February

February is the warmest month with highs of 27°C and lows of 20°C. Light rainfall and breezy conditions.

Comfort

23°
Feels Like Mild
23°C
Temperature
20° 27°

Weather

18 mm
Rainfall
6.4 m/s
Wind
Breezy

March

March is mild with highs of 26°C and lows of 19°C. Light rainfall.

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 26°

Weather

14 mm
Rainfall
5.5 m/s
Wind
Light Breeze

April

April is mild with highs of 23°C and lows of 15°C. Moderate rainfall (38 mm).

Comfort

19°
Feels Like Mild
19°C
Temperature
15° 23°

Weather

38 mm
Rainfall
4.4 m/s
Wind
Light Breeze

May

May is cool with highs of 20°C and lows of 14°C. Significant rainfall (103 mm).

Comfort

17°
Feels Like Cool
17°C
Temperature
14° 20°

Weather

103 mm
Rainfall
4.6 m/s
Wind
Light Breeze

June

June is cool with highs of 18°C and lows of 11°C. Significant rainfall (152 mm).

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 19°

Weather

152 mm
Rainfall
5.2 m/s
Wind
Light Breeze

July

July is cool with highs of 17°C and lows of 11°C. The wettest month with heavy rain (158 mm) and breezy conditions.

Comfort

14°
Feels Like Cool
14°C
Temperature
11° 17°

Weather

158 mm
Rainfall
6.6 m/s
Wind
Breezy

August

August is the coolest month with highs of 17°C and lows of 10°C. Significant rainfall (107 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
10° 17°

Weather

107 mm
Rainfall
5.6 m/s
Wind
Light Breeze

September

September is cool with highs of 18°C and lows of 11°C. Moderate rainfall (70 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
11° 18°

Weather

70 mm
Rainfall
5.4 m/s
Wind
Light Breeze

October

October is cool with highs of 19°C and lows of 12°C. Moderate rainfall (39 mm).

Comfort

16°
Feels Like Cool
16°C
Temperature
13° 19°

Weather

39 mm
Rainfall
5.1 m/s
Wind
Light Breeze

November

November is mild with highs of 21°C and lows of 15°C. Light rainfall.

Comfort

18°
Feels Like Mild
18°C
Temperature
15° 21°

Weather

25 mm
Rainfall
5.2 m/s
Wind
Light Breeze

December

December is mild with highs of 24°C and lows of 17°C. The driest month with just 7 mm.

Comfort

21°
Feels Like Mild
21°C
Temperature
17° 24°

Weather

7 mm
Rainfall
5.8 m/s
Wind
Light Breeze

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