Semaphore Weather Forecast
- 11
- 25
Mostly clear
- 17
- 25
Morning shower or two
- 13
- 24
Mostly sunny
- 14
- 28
Mostly sunny
- 18
- 25
Mostly sunny
- 13
- 27
Sunny
- 19
- 29
Mostly sunny
Today 18 Apr Adelaide
Mostly clear. Winds northeasterly 15 to 20 km/h.
Adelaide Metropolitan Waters
- Wind
- Northeasterly 10 to 15 knots.
- Seas
- Below 0.5 metres.
- 1st Swell
- Westerly below 0.5 metres.
- Weather
- Mostly clear.
- Weather Situation
- A high pressure system centred west of Tasmania extends a ridge over western Victoria. A cold front over the far west of SA will weaken as it moves eastwards over central and eastern parts on Sunday morning. The high will move eastwards to be centred southeast of Tasmania later Sunday but will continue to extend a ridge over SA early next week. Another front will move across the south of SA late Tuesday and early Wednesday then another high will move across waters to the south during Wednesday.
Semaphore Temperature Statistics View More
April Temperature
Parafield Airport (13km)
Lowest 15 April, 2026
7.4 °CAverage April
17 °CHighest 6 April, 2026
28.3 °C
Climate (2021–Present)
Parafield Airport (13km)
Average Low 2021–2026
11.2 °CAverage 2021–2026
17 °CAverage High 2021–2026
23.5 °C