Sydney Enclosed Waters Forecast: Sydney Harbour, Pittwater and Botany Bay

View the current warnings for New South Wales

Forecast issued at 10:00 am EST on Sunday 21 September 2025.

Weather Situation

A high pressure system to the west extends a ridge over the state. A cold front is forecast to cross the south today then the east on Monday, bringing a fresh and gusty southerly change, before moving over the northern coast during Tuesday. Generally dry and settled conditions from Wednesday as a strong high pressure system moves over the Bight and extends a ridge across the coastal waters.

Forecast for Sunday until midnight

Winds
Variable about 10 knots.
Seas
Below 0.5 metres.
Weather
Sunny.

Monday 22 September

Winds
West to northwesterly below 10 knots tending southerly 15 to 25 knots in the middle of the day.
Seas
Below 0.5 metres.
Weather
Sunny morning. 70% chance of showers in the afternoon and evening.

Tuesday 23 September

Winds
South to southwesterly 15 to 25 knots tending south to southeasterly 15 to 20 knots during the afternoon then turning west to southwesterly below 10 knots during the evening.
Seas
Below 0.5 metres.
Weather
Partly cloudy.

Wednesday 24 September

Winds
West to northwesterly below 10 knots tending southeasterly 10 to 15 knots during the day then turning south to southwesterly below 10 knots during the evening.
Seas
Below 0.5 metres.
Weather
Sunny.

Please be awareWind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height.

The next routine forecast will be issued at 4:05 pm EST Sunday.

Product IDN11013