New South Wales

Synoptic Situation: A cold front that move through most of New south Wales yesterday is continuing to linger as a low pressure trough in the states northeast this afternoon. A low pressure system is currently developing within this trough, offshore near to Port Stephens. This will reinforce a vigorous southerly flow along much of the coast during the next 24 hours, with likely gales about central parts of the coast. The low should weaken during Wednesday and Thursday as a high pressure system becomes dominant over the Tasman Sea, pushing a ridge into New South Wales, and bringing a gradual return to northeasterly winds. Another cold front looks set to arrive on the weekend.
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.

Eden Coast: Montague Island to Gabo Island

Tuesday 17 September

Winds: East to southeasterly 10 to 15 knots.
Seas: 1 to 1.5 metres, decreasing to 1 metre later in the evening.
Swell 1: Southerly 1.5 metres.
Swell 2: East to northeasterly around 1 metre.
Weather: Partly cloudy.

Wednesday 18 September

Winds: East to southeasterly 10 to 15 knots tending east to northeasterly during the morning. Winds reaching up to 20 knots south of Green Cape in the evening.
Seas: Below 1 metre, increasing to 1 to 1.5 metres by early evening.
Swell 1: Easterly around 1 metre, increasing to 1 to 1.5 metres during the morning, then tending east to northeasterly 1.5 to 2 metres around midday.
Swell 2: Southerly 1 to 1.5 metres, decreasing to around 1 metre during the afternoon.
Weather: Partly cloudy.

Thursday 19 September

Winds: Easterly 15 to 20 knots turning northeasterly early in the morning.
Seas: 1 to 1.5 metres, increasing to 1.5 to 2 metres by early evening.
Swell 1: Easterly 1.5 to 2 metres, decreasing to 1.5 metres during the afternoon, then tending east to northeasterly 1.5 metres by early evening.
Swell 2: Southerly around 1 metre.
Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm from the late morning.

Friday 20 September

Winds: Northeasterly 15 to 25 knots turning northerly 25 to 30 knots during the day.
Seas: 1.5 to 2 metres, increasing to 2 to 3 metres during the morning.
Swell 1: Southerly around 1 metre, increasing to 1 to 1.5 metres during the evening.
Swell 2: Easterly 1 to 1.5 metres, tending northeasterly around 1 metre during the afternoon or evening.
Weather: Partly cloudy.