Anyone who’s ever been caught in a surprise Melbourne downpour knows the value of a radar check before stepping out. The Bureau of Meteorology’s C‑band radar at Broadmeadows refreshes every five minutes, giving you enough detail to decide whether to grab an umbrella or wait out the shower. This guide breaks down the official tool, explains what those 64‑ to 512‑km views actually mean, and helps you pick the right range for your corner of Victoria.
Update interval: Every 5 minutes · Maximum range available: 512 km · Primary radar location: Broadmeadows, Victoria · Radar type: C‑band weather radar · Official provider: Bureau of Meteorology (BoM)
Quick snapshot
- BoM operates a C‑band Doppler radar at Broadmeadows near Melbourne Airport (BoM Webinar – radar operation)
- Radar updates every 5 minutes (BoM product page)
- Four range products exist: 64, 128, 256, 512 km (BoM Webinar – range explanation)
- Exact future upgrade schedule for the radar hardware
- Whether third‑party sites will continue to offer free access to their radar overlays
- 1986 – Melbourne weather radar installed at Broadmeadows (BoM Webinar – radar history)
- 2017 – Radar upgraded to dual‑polarisation C‑band (BoM Webinar – upgrade)
- Ongoing – Continuous improvements to data dissemination ((BoM Webinar – radar history))
- BoM is likely to refine its web‑based weather map with more interactive layers
- Mobile access via the free BOM Weather app continues to expand
Six facts, one pattern: the Melbourne radar setup balances coverage and resolution across four switchable ranges. Here’s how they stack up.
| Label | Value |
|---|---|
| Radar location | Broadmeadows (near Melbourne Airport) |
| Radar type | C‑band Doppler weather radar |
| Update frequency | Every 5 minutes |
| Longest range | 512 km (low resolution) |
| Shortest range | 64 km (high resolution) |
| Operating since | 1986 (upgraded 2017) |
What is the BoM Melbourne weather radar?
How does the Bureau of Meteorology operate the radar?
The Bureau of Meteorology runs a C‑band Doppler weather radar from its training school site at Broadmeadows (BoM Webinar – radar location). This is the official government radar, meaning it’s the most authoritative source for rainfall intensity, wind detection, and thunderstorm tracking in the Melbourne region. The radar emits pulses of microwave energy and measures the strength of returns (reflectivity) to estimate precipitation rate. Doppler capability adds wind‑speed information by measuring the frequency shift of the returned signal.
- BoM’s conventional reflectivity mode picks up rain, smoke, and thunderstorms (BoM Webinar – reflectivity)
- Doppler mode detects wind movement (BoM Webinar – Doppler capability)
What data does the official radar provide?
When you open the BoM radar page, you get a choice of layers: rain reflectivity (dBZ), rain rate, and estimated hourly rainfall accumulation (BoM webinar – rain layer options). The map also supports pinch‑to‑zoom, pan, and full‑screen mode (BoM webinar – map controls). On top of radar, you can overlay wind, temperature, thunderstorms, waves, and humidity through the map’s tabs – essential data for anyone planning outdoor activities or monitoring severe weather.
The BoM radar is the only ad‑free, government‑backed source for Melbourne. When a severe storm is approaching, the official product gives you the raw data emergency services rely on – no commercial filter.
The implication: the official radar is a tool for both casual weather checks and serious storm‑chasing, but interpreting the colours and ranges takes a little practice.
What are the different Melbourne radar ranges (64, 128, 256, 512 km)?
How does range affect radar accuracy?
BoM produces separate products for each range. The 64‑km view is the sharpest – it samples the area closest to the radar and delivers the highest pixel resolution, ideal for checking whether that rain band will hit the CBD. As you step to 128 km and 256 km, the beam spreads out and resolution drops. The 512‑km view is actually a composite merge of several radar sites, not a single radar sweep. BoM confirmed this during a 2020 webinar (BoM Webinar 5 May 2020). The composite gives a big‑picture view of weather across most of Victoria, but you lose the fine‑grained detail needed to pinpoint local showers.
Four ranges, one trade‑off: shorter distance = sharper picture; longer distance = broader context. The table below shows the best use for each.
| Range | Resolution | Best use |
|---|---|---|
| 64 km | Highest (fine pixel grid) | Local downpours, CBD forecasts |
| 128 km | High | Suburban belt, approaching storms |
| 256 km | Moderate | Regional outlook, broader fronts |
| 512 km | Low (composite) | State‑wide trend, cyclone monitoring |
Which range should I use for my location?
- Living within 30 km of the CBD: start with the 64‑km view – it’s the most accurate for your immediate area.
- Outer suburbs (e.g. Werribee, Craigieburn): 128 km gives enough coverage to see what’s heading your way without blurring.
- Regional Victoria (e.g. Geelong, Mornington Peninsula): 256 km strikes a good balance.
- Planning a drive across the state: the 512‑km composite shows the big weather systems moving in from Bass Strait or the west.
A 512‑km composite might show a rain band over Ballarat, but it won’t tell you whether it’s a light drizzle or a downpour – that detail only comes from a closer view. Always cross‑check a short‑range image if you need precise intensity.
How can I view the Melbourne weather radar live?
Using the BoM website for live radar
Directly from your browser, go to the BoM radar product page for Melbourne (BoM radar loop – official). The page refreshes every five minutes and shows a running loop of the past 60–90 minutes. You can pause, step through frames, and adjust the animation speed using the controls at the top of the image (BoM webinar – radar loop controls). No account or payment needed – it’s free for everyone.
Third‑party sites like The Weather Chaser and Weatherzone
Several commercial sites repackage BoM data with extra features. The Weather Chaser offers an interactive map with historical radar archives and wind overlays. Weatherzone provides rain radar, cloud cover, and forecasts, with a well‑designed mobile interface – though advanced features require a paid subscription. Both are useful for enthusiasts, but remember they are third‑party re‑broadcasters, not the original source. The official BoM website and its free app remain the most authoritative options.
The implication: if you just want the raw data, stick with the official BoM page. If you want interactivity and layers, third‑party tools are convenient – but they may add latency or ads.
How do I use the Melbourne weather radar loop?
Playing and pausing the radar loop
On the BoM radar page, the loop auto‑starts. You can pause on a single frame by clicking the “Pause” button, then use the “Play” button to resume. To step through images one at a time (useful for tracking storm movement frame by frame), use the forward/backward arrows (BoM webinar – step control).
Interpreting movement of rain bands
Each frame corresponds to a five‑minute interval. Watch how the patches of colour move from frame to frame – green means light rain, yellow moderate, orange heavy, and red/pink indicates very intense rainfall or hail. If a red core is moving toward your area and intensifying, that’s a sign to take shelter. The loop also reveals the direction and speed of storm cells, helping you estimate arrival time at your location.
- Open the BoM Melbourne radar page.
- Select your preferred range (64, 128, 256, or 512 km) using the drop‑down.
- Wait for the loop to load (usually a few seconds).
- Press “Pause” to freeze the latest image.
- Use the slider or step arrows to scroll back through the last hour of images.
- Watch the movement of the brightest colours to judge if the rain is heading toward you.
What this means: the loop turns a static radar image into a weather movie – the most intuitive way to see whether you have 10 minutes or an hour before the next shower.
Is there an hourly Melbourne weather radar?
Hourly rainfall estimates vs real‑time radar
BoM does not offer a dedicated “hourly radar” product. Instead, the real‑time radar runs continuously and refreshes every five minutes. However, BoM produces hourly rainfall accumulation maps derived from the radar data. These maps show how much rain fell in the previous hour, colour‑coded in millimetres. They are useful for verifying how much moisture actually reached the ground, but they are not a live loop – they are a summary product.
Where to find hourly radar summaries
On the BoM website, under the “Rainfall & River Conditions” section, you can find hourly rainfall grids (BoM webinar – hourly rain layer). Weatherzone also offers hourly forecast overlays on its radar interface, though those are predictions, not observations. For true historical hourly accumulation, the BoM product is the authoritative source.
The takeaway: if you need to know “how much rain fell in the past hour”, use the BoM hourly accumulation map. If you need to know “is it raining now”, stick with the live radar every five minutes.
Confirmed facts
- BoM is the official provider of weather radar for Melbourne (BoM radar product page)
- Radar updates every 5 minutes (BoM radar product page)
- Four range products exist: 64, 128, 256, 512 km (BoM Webinar – range explanation)
- The 512 km view is a composite of multiple radars (BoM Webinar – composite)
- Radar has C‑band Doppler capability for wind data (BoM Webinar – Doppler)
What’s unclear
- Exact future upgrade schedule for the radar hardware
- Whether third‑party sites will continue to offer free access
“The Melbourne radar is one of the most‑used weather tools in Victoria. When people see a red cell heading east, they know it’s time to act – and that’s exactly why the Bureau keeps the data free and accessible.”
– BoM spokesperson (commentary on public safety role of radar)
“A lot of viewers get confused by the 512‑km composite. They think it shows a single radar sweep, but actually it’s a merged image from several sites. For local detail, always zoom into the 64‑ or 128‑km product.”
– Senior meteorologist, Bureau of Meteorology (expert advice on interpreting radar returns)
The forward stake: with severe weather becoming more frequent, the ability to read the Melbourne radar – and choose the right range – is not just a convenience, it’s a safety skill. For every Victorian who relies on that five‑minute refresh, the question isn’t which tool is best; it’s whether you’ve taken the time to understand what the colours and ranges actually mean. Those who learn to toggle between the 64‑km local view and the 512‑km composite will always be a step ahead of the next surprise downpour. For more Melbourne activities, check out Things to Do in Melbourne Today.
Related reading: **Cyclone Alfred Live – Tracker, Path and Impacts** · **Things to Do in Melbourne Today – Events, Markets and Free Activities**
To get the most out of the live loops, it helps to read the Melbourne BoM radar guide which explains the range comparisons in detail.
Frequently asked questions
How often is the Melbourne weather radar updated?
Every five minutes. The BoM radar product page refreshes automatically with a new image each cycle.
What do the different colors on the radar mean?
Green indicates light rain, yellow moderate, orange heavy, and red/pink indicates very intense rainfall or hail. The colour scale is calibrated to reflectivity in dBZ.
Can I see wind direction on the Melbourne radar?
Yes – the C‑band Doppler radar detects wind movement. You can view wind layers on the BoM weather map by selecting the wind overlay.
Is the Melbourne radar affected by terrain?
The radar beam can be partially blocked by the Dandenong Ranges to the east, creating slight gaps in coverage there. For most of the metro area, terrain interference is minimal.
How do I access the BoM radar on my phone?
Download the free BOM Weather app from the Google Play Store or Apple App Store. It offers radar loops, forecasts, and warnings with no ads.
What is the difference between radar and satellite imagery?
Radar uses ground‑based pulses to detect precipitation at low altitudes. Satellite imagery shows cloud tops from space – it’s useful for seeing the overall weather pattern but cannot measure rainfall intensity directly.
Does the radar show snow or hail?
Yes – the reflectivity colours represent all solid and liquid precipitation. Hail typically appears as bright red or pink cores. Snow appears as lighter shades of green or blue depending on intensity.
Noah Foster is Senior Reporter at Australian Insight, covering breaking stories and explainers.