Mouth Flat Beach Weather Forecast

Today 3 Dec
- 11
- 27
Partly cloudy
Thu 4 Dec
- 18
- 27
Partly cloudy
Fri 5 Dec
- 12
- 22
Shower
Sat 6 Dec
- 12
- 19
Windy
Sun 7 Dec
- 10
- 19
Partly cloudy
Mon 8 Dec
- 10
- 23
Sunny
Tue 9 Dec
- 12
- 23
Partly cloudy

Today 3 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Thu 4 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Fri 5 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Sat 6 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Sun 7 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Mon 8 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm
Tue 9 Dec
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
8. 10 pm

Today 3 Dec Kangaroo Island

Mostly sunny. Winds north to northwesterly 25 to 40 km/h. Overnight temperatures falling to around 11 with daytime temperatures reaching around 30.

South Central Coastal Waters

Wind: North to northwesterly 15 to 20 knots.

Seas: Around 1 metre, increasing to 1 to 1.5 metres during the morning.

1st Swell: Southwesterly 2 metres, tending westerly 2 metres during the morning, then tending southwesterly 2 metres around midday.

Weather: Partly cloudy.

Mouth Flat Beach Temperature Statistics View More

December Temperature

Cape Willoughby (17km)

Lowest 30 August, 2025
5.6 °C
Average 2025
15.7 °C
Highest 10 March, 2025
34.4 °C
Lowest 3 November, 2025
8.2 °C
Average November
14.6 °C
Highest 24 November, 2025
25.4 °C
Lowest 2 December, 2025
10.7 °C
Average December
14 °C
Highest 1 December, 2025
16.5 °C

Climate (2020–Present)

Cape Willoughby (17km)

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Average Low 2020–2025
13.3 °C
Average 2020–2025
15.3 °C
Average High 2020–2025
18.4 °C

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