It has been raining so much in Sydney lately because several short-term weather systems are lining up over an already wet region, on top of longer- term climate influences that are making intense downpours more likely in eastern Australia.

Quick Scoop

1. What’s going on right now?

  • A slow-moving low-pressure system and associated trough off the east coast is helping to funnel very moist air onto the NSW coast, including Sydney.
  • That moist onshore flow is feeding repeated showers and thunderstorms rather than a quick in‑and‑out storm, so it feels like it’s raining “all the time.”
  • Parts of coastal NSW are forecast to see 100 mm or more over just a few days when these systems park themselves nearby.

Think of it as a conveyor belt of humid air coming in from the ocean and getting wrung out over the same area again and again.

2. Why does Sydney get these soaking events?

Sydney’s climate naturally leans towards frequent rain, and certain set‑ups really amplify that.

Key local ingredients:

  • East Coast Lows & coastal troughs: These are powerful low-pressure systems that form near the NSW coast and can dump huge amounts of rain over a short time, especially when they move slowly.
  • Onshore winds from the Tasman Sea : Moist easterlies hit the ranges west of Sydney, forcing air to rise and cool, which boosts rainfall on the coastal strip and city.
  • Summer storms : In warm months, high humidity plus heat can trigger heavy thunderstorms that “train” over the same suburbs, leading to intense bursts of rain and flash flooding.

So, even without anything unusual, Sydney is one of Australia’s wetter big cities and has a history of sudden, heavy falls.

3. The bigger climate picture (why it feels extra-rainy these years)

On top of normal weather, there’s the climate background:

  • A warmer atmosphere can hold more water vapour, like a bigger sponge, so when conditions are right, more rain can fall in the same amount of time.
  • Studies for Australia show extreme rainfall events (the heaviest downpours each year) are becoming more intense even if total yearly rainfall doesn’t always change much.
  • In recent years, eastern Australia has repeatedly seen long runs of heavy rain and flooding episodes linked to wet climate phases and upper-level troughs lingering over the southeast.

That doesn’t mean every rainy week is “caused” by climate change, but the odds and intensity of the really big soakings are going up.

4. Is this “normal” Sydney weather or something new?

From locals and past patterns, what you’re feeling is partly “Sydney being Sydney,” dialed up a bit.

  • Long-time residents often comment that Sydney does get more rain than people expect, especially compared with its sunny image and with places like Melbourne.
  • There have been multiple recent summers and years where people on forums complain that their beach plans are “ruined” by constant showers and storms.
  • What seems to be changing is less the fact that it rains, and more that extreme, short, intense events (flash-flood-style rain) are becoming more common.

So you’re not imagining it: heavy, disruptive rain is a known feature of Sydney, and recent years have had several standout wet spells.

5. Quick FAQ style rundown

  • “Why is it raining so much in Sydney?”
    Because a slow-moving coastal low/trough is feeding very moist ocean air over an already wet east coast, producing repeated heavy showers and storms.
  • “Is climate change involved?”
    Climate change is loading the atmosphere with more moisture, which increases the intensity of the heaviest downpours, including in eastern Australia, even if not every single event can be directly attributed.
  • “Is this how Sydney always is?”
    Sydney has always been relatively wet with a mix of coastal lows, onshore winds and storms; what appears to be shifting is the intensity and frequency of extreme rainfall bursts.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.