New South Wales

Synoptic Situation: A strong and slow-moving high pressure system near New Zealand extends a ridge towards New South Wales, bringing northeasterly winds to most of the coastal waters. A cold front is currently bringing a southerly change to the southern coast, and this will reach central parts of the coast today before stalling. A second front will follow on Monday, pushing the change to the Queensland border by Tuesday.
Wind 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.

Hunter Coast: Seal Rocks to Broken Bay

Sunday 22 September

Winds: North to northwesterly 15 to 20 knots, reaching up to 30 knots during the morning. Winds tending south to southeasterly 10 to 15 knots in the early afternoon then becoming east to northeasterly about 10 knots in the late afternoon.
Seas: 2 to 3 metres, decreasing to 1 metre around midday.
Swell 1: Northeasterly 1 to 2 metres.
Swell 2: Southerly 1 to 1.5 metres, decreasing below 0.5 metres during the morning.
Weather: Cloudy. 70% chance of showers and the chance of a thunderstorm.

Monday 23 September

Winds: Variable about 10 knots becoming southwesterly 15 to 25 knots before dawn. Winds reaching up to 30 knots south of Port Stephens in the evening.
Seas: Around 1 metre, increasing to 1.5 to 2.5 metres later in the evening.
Swell 1: Southerly 1 to 1.5 metres.
Swell 2: Northeasterly 1 to 1.5 metres.
Weather: The chance of a thunderstorm in the early morning. Sunny day.

Tuesday 24 September

Winds: Southwesterly 15 to 20 knots becoming variable about 10 knots during the morning.
Seas: 1 to 2 metres, decreasing below 1 metre during the morning.
Swell 1: Southerly 1 to 1.5 metres.
Swell 2: Northeasterly 1 to 1.5 metres, decreasing to around 1 metre during the morning.
Weather: Mostly sunny.