IDN11024 Australian Government Bureau of Meteorology New South Wales Northern Rivers District Forecast Issued at 9:55 am EDT on Sunday 21 December 2025 for the period until midnight EDT Wednesday 24 December 2025. Warning Information For latest warnings go to www.bom.gov.au, subscribe to RSS feeds, call 1300 659 210* or listen for warnings on relevant TV and radio broadcasts. Weather Situation A broad low pressure trough over the west will deepen on Sunday, drawing heat and moisture into the State as a low and cold front develops to the south. The trough will push into the northeast early in the new working week. Following this, a high pressure ridge will build across the west and south early next week. Forecast for the rest of Sunday 21 December Mostly sunny. The chance of a thunderstorm in the south in the late afternoon and evening. Winds north to northeasterly 20 to 30 km/h. Daytime maximum temperatures 33 to 39. Ballina Sunny. Max 32 Byron Bay Becoming windy. Sunny. Max 30 Grafton Mostly sunny. Max 39 Lismore Sunny. Max 35 Tweed Heads Sunny. Max 31 Fire Danger: Far North Coast: Moderate Sun protection 8:20am to 5:00pm, UV Index predicted to reach 13 [Extreme] Forecast for Monday 22 December Mostly sunny day. Slight chance of a shower in the late afternoon and evening. The chance of a thunderstorm in the late afternoon and evening. Winds north to northwesterly 15 to 25 km/h becoming light in the late evening. Overnight temperatures falling to the low to mid 20s with daytime temperatures reaching 34 to 39. Ballina Mostly sunny. Min 23 Max 34 Byron Bay Windy. Mostly sunny. Min 24 Max 31 Grafton Possible late shower. Min 23 Max 39 Lismore Mostly sunny. Min 20 Max 36 Tweed Heads Partly cloudy. Min 23 Max 32 Forecast for Tuesday 23 December Partly cloudy. High chance of showers. The chance of a thunderstorm. Light winds. Overnight temperatures falling to the low to mid 20s with daytime temperatures reaching the low to mid 30s. Ballina Shower or two. Possible storm. Min 23 Max 31 Byron Bay Showers. Possible storm. Min 24 Max 30 Grafton Showers. Possible storm. Min 23 Max 34 Lismore Showers. Possible storm. Min 21 Max 31 Tweed Heads Showers. Possible storm. Min 24 Max 32 Forecast for Wednesday 24 December Cloudy. Medium chance of showers, most likely in the morning and afternoon. The chance of a thunderstorm. Light winds becoming east to southeasterly 15 to 20 km/h during the day then becoming light during the evening. Overnight temperatures falling to the low 20s with daytime temperatures reaching around 30. Ballina Shower or two. Min 21 Max 27 Byron Bay Shower or two. Min 22 Max 27 Grafton Partly cloudy. Min 21 Max 30 Lismore Shower or two. Min 19 Max 28 Tweed Heads Shower or two. Min 21 Max 29 The next routine forecast will be issued at 4:30 pm EDT Sunday. * Calls to 1300 numbers cost around 27.5c incl. GST, higher from mobiles or public phones. Copyright Commonwealth of Australia 2011, Bureau of Meteorology (ABN 92 637 533 532). Users of these web pages are deemed to have read and accepted the conditions described in the Copyright, Disclaimer, and Privacy statements (http://www.bom.gov.au/other/copyright.shtml).