Wednesday, 13 May 2026
Weekly Irrigation Requirements
Northern Victoria
Hello Irrigators,
This is our final update for the 2025–26 irrigation season, wrapping up with forecast rain expected across the GMID over the weekend and into next week.
Thank you for your ongoing support throughout the season. We look forward to reconnecting in August with the opening of the 2026-27 season. Fingers crossed for plenty of rainfall and run-off over the winter months.
We welcome any feedback on this season’s updates—please feel free to share your thoughts.
Wishing you all a safe winter and a successful crop yield.
This provides reference evapotranspiration (ETo) information to assist with irrigation scheduling for improved yields and higher water productivity.
This information can also be viewed at ExtensionAUS Irrigating Agriculture where an interactive map provides live daily ETo data for any Victorian location.
In this update:
- Summary
- Water links
- Last week’s irrigation requirement
- Next week’s irrigation requirement
- Daily ETo and rainfall
- Soil temperature
- Seven-day forecast – Pyramid Hill
1. Summary
- Plant water requirement for the past 7 days was 9 mm
(for a reference crop of pasture at Kyabram). - Forecast ETo for the next 7 days is 12 mm (cumulative ETo at Kyabram).
- Current surface-irrigation interval is 26 days (for Kyabram at 40mm refill point).
‘Water requirement’ for our reference crop of pasture (ETo) at Kyabram*
Table 1: Water requirement for our reference crop of pasture (ETo) at Kyabram* * See the tables and graphs below for ETo (and rainfall) at more locations.
2. Water links
Current determination – An updated outlook for 2026/27 seasonal determinations will be released on Friday, 15 May, 2026.
Events – Irrigating Agriculture
Resources – Key Performance Checks for a Centre Pivot Irrigation System
Webinars – Irrigating Agriculture Webinars
3. Last week’s reference evapotranspiration (ETo)
Wednesday 6 May – Tuesday 12 May
Table 2: Total evapotranspiration values relating to Wednesday 6 May – Tuesday 12 May
4. Next week’s forecast reference evapotranspiration (ETo)
Wednesday 13 May – Tuesday 19 May
Table 3: Total evapotranspiration values relating to Wednesday 13 May – Tuesday 19 May
5. Daily evapotranspiration (ETo) and rainfall – last week and next week
Figure 1: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Deniliquin
Figure 2: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Kyabram
Figure 3: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Tatura
Figure 4: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Kerang
Figure 5: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Echuca
Figure 6: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Yarrawalla
Figure 7: Total evapotranspiration and rainfall values relating to Wednesday 6 May to Tuesday 19 May – Numurkah
6. Soil temperature
Soil temperature measured at 9 am today (Wednesday):
- Wee Wee Rup (irrigated annual pasture): 14.41°C at 10cm.
- Wandella (irrigated lucerne): 15.44°C at 15cm.
7. Seven-day forecast – Pyramid Hill
Figure 8: Weather forecast temperatures for Pyramid Hill from 13 May to 19 May - Source: Weatherzone.
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The intention of this service is not for the information to be used in isolation when making decisions about irrigation. ETo data provides another handy tool in your irrigation toolbox and needs to be used in conjunction with other preferred scheduling methods and updated weather information.
This publication is provided solely for information purposes and no representation or warranty is made as to its quality, accuracy, completeness, suitability or fitness for any particular purpose.
You should make your own inquiries as to its appropriateness and suitability for your circumstances.
The State of Victoria as represented by the Department of Energy, Environment and Climate Action (DEECA) accepts no duty of care and disclaims all liability in relation to use of this publication.
