Australian Government Bureau of Meteorology
New South Wales
TOP PRIORITY FOR IMMEDIATE BROADCAST
Detailed Severe Thunderstorm Warning
for Heavy Rainfall
for parts of Gosford/Wyong and Sydney areas.
Issued at 2:50 am Wednesday, 18 March 2026.
Slow moving thunderstorms producing heavy rain along the central NSW coast.
HEAVY RAINFALL for the following areas:
Gosford/Wyong and Sydney
The Bureau of Meteorology warns that, at 2:45 am, severe thunderstorms likely to produce heavy rainfall that may lead to flash flooding were detected near Gosford and Manly. These thunderstorms are moving towards the north. They are forecast to affect Terrey Hills, Gordon and Hurstville by 3:15 am and Mona Vale, Wyong and Sydney Olympic Park by 3:45 am.
The State Emergency Service advises that people should:
* Keep clear of creeks and storm drains.
* Don't walk, ride your bike or drive through flood water.
* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
* Stay indoors away from windows, and keep children and pets indoors as well.
For emergency help in flood and storms, ring the SES on 132 500.
Stay updated on the Hazards Near Me NSW app or the ACT ESA website (https://esa.act.gov.au).
A more general severe thunderstorm warning is also current for parts of the Hunter, Metropolitan, Illawarra and Central Tablelands districts.
Other warnings may be current.
The next warning is due to be issued by 3:50 am.
Check https://www.bom.gov.au/weather-and-climate/warnings-and-alerts. Warnings are also available through TV and Radio broadcasts or call 1300 659 210. The Bureau and State Emergency Service would appreciate warnings being broadcast regularly.
Forecast
Barangaroo (33.8612°S, 151.2027°E, 66m AMSL) set as my default location ›
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7 day forecast
Today: Cloudy. High chance of showers. The chance of a thunderstorm in the morning, possibly severe with heavy rain which may lead to flash flooding. Winds S 15 to 20 km/h tending SE in the middle of the day then becoming light in the evening.
Forecast for Barangaroo (33.8612°S, 151.2027°E, 66m AMSL) Wed Thu Fri Sat Sun Mon Tue Summary 
Minimum 20° 19° 19° 19° 19° 19° 19° Maximum 26° 25° 27° 27° 25° 26° 26° Chance of rain 80% 90% 70% 70% 90% 90% 90% Likely amount 5-10mm 10-20mm 1-5mm 5-10mm 10-20mm 5-10mm 1-5mm UV index Very High Very High Very High Moderate Moderate High Moderate Fire Danger Rating Moderate No Rating Moderate Moderate - - - Frost risk Nil Nil Nil Nil Nil Nil Nil 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm Wind speed 14
(km/h)16
(km/h)10
(km/h)12
(km/h)16
(km/h)20
(km/h)12
(km/h)20
(km/h)18
(km/h)23
(km/h)12
(km/h)18
(km/h)13
(km/h)20
(km/h)Wind direction SSW SSE SSW S SSW SSE SW SSE S S S SE S SSE Relative humidity 90% 79% 94% 82% 89% 70% 85% 69% 86% 73% 85% 71% 83% 72% Dew point 20°C 20°C 19°C 20°C 20°C 20°C 18°C 19°C 18°C 18°C 19°C 19°C 18°C 19°C -
Sunrise and sunset times
Sunrise / Sunset for Barangaroo (33.8612°S, 151.2027°E, 66m AMSL) First light Sunrise Sunset Last light Moon rise Moon set Moon phase New moon First quarter Full moon Last quarter 6:31am EDT 6:56am EDT 7:10pm EDT 7:35pm EDT 5:44am EDT 6:37pm EDT 
Waning crescent
New moon Mar 19 First quarter Mar 26 Full moon Apr 02 Last quarter Apr 10 -
Warnings
- Detailed Severe Thunderstorm Warning (Heavy Rainfall) for parts of Gosford/Wyong and Sydney areas
- Detailed Severe Thunderstorm Warning (Heavy Rainfall) for parts of Gosford/Wyong and Sydney areas
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Hunter, Metropolitan, Illawarra and Central Tablelands
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Hunter, Metropolitan, Illawarra and Central Tablelands
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Temperature for next 7 days
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Rain for next 7 days
