Weather forecast card: Daily forecast uses UTC not local time (JST). Shows previous day's forecast until 9:15 JST

[sayurin]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

When using the Weather forecast card in HA on JST-9 (UTC+9), the forecast for the previous day is shown until 9:15 JST (UTC 0:15), as shown in the screenshot. I want the forecast to reflect the local time zone correctly instead of using UTC.

at 9:15

at 9:16

Describe the behavior you expected

I expected the daily forecast to be shown according to my local time zone (JST, UTC+9), and for the next day's forecast to appear after midnight local time, not delayed until 9:15.

Steps to reproduce the issue

1. Set Home Assistant to Asia/Tokyo timezone (JST, UTC+9)
2. Use the Weather forecast card
3. Observe after midnight JST – the previous day's forecast is still displayed until 9:15 JST (UTC 0:15)
4. See screenshots attached for before and after 9:15

What version of Home Assistant Core has the issue?

2026.3.2

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

Google Chrome 146.0.7680.80

Which operating system are you using to run this browser?

Windows 11

State of relevant entities

Problem-relevant frontend configuration

JavaScript errors shown in your browser console/inspector

Additional information

No response

[karwosts]

I think you'll have to take this up with your integration, the forecast card itself doesn't really have any logic to do with times or timezones.

Frontend just call get forecasts, which returns an array of forecast items, and we display them. If the first forecast item is today, tomorrow, yesterday, or next tuesday, that's controlled by the integration.