Harbour conditions
Wind, sea, tide and current on the harbour right now, and the coastal stations that see a change first.
The forecast is a model's and the tide turns are worked out from one, not read; the current is the latest reading at Balls Head. See the notes below each.
After a mooring, a marina or a ramp? The harbour guide has Transport for NSW's public moorings, marinas and boat ramps, and the moorings a spectator can watch the racing from.
Latest reading , as logged when this page was built.
Live readings appear here when the page can reach the club's harbour logger. Until then, the cards show the last reading logged when this page was built, and the harbour observations page has the live ones.
Readings unavailable. The club's harbour logger could not be reached. Try again in a few minutes, or read the Port Authority page directly.
Wind on the harbour
- the current, the way it sets, longer the stronger
- the sea at the Heads, the way it runs, longer the higher
- under 5 knots
- 5 to 10 knots
- 10 to 15 knots
- 15 to 20 knots
- 20 to 25 knots
- 25 knots and over
Ten minute mean in knots, the gust, and the direction the wind comes from, relative to true north; the arrow flies with it. The line is the last six hours, mean and gust, with the direction at each reading along the bottom. The gust is the highest three second average in the sample, and the Port Authority's own note on it is that gusts "may be 40% high".
The shore matters as much as the forecast. Manns Point and Berry Island are 350 m apart, on Greenwich Point and at Wollstonecraft, yet in a north-easter or an easterly the club's log usually has Berry Island at half of Manns Point or less: the same wind over two shores. Read the station on your water.
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Fort Denison
mid harbour, south end of the fort
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Western Wedding Cake
the entrance, off Watsons Bay
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Manns Point
Greenwich, Lane Cove River
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Berry Island
Wollstonecraft
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Glebe Island
west of the bridge
Next 12 hours wind forecast for the harbour
Weather data by Open-Meteo.com, CC BY 4.0. A model's wind over a grid square several kilometres across, not a reading from the harbour: the sea breeze and the shore can make the water quite different.
Tide and current
The tide is the measured height at Fort Denison, not the prediction: in the Port Authority's own notes the heights are to chart datum, 0.925 m below Australian Height Datum, and a measured level can differ a good deal from the predicted one. The second gauge is Manly Hydraulics Laboratory's at HMAS Penguin on Middle Head, the reference gauge for the NSW tide predictions, on the same datum, with how far the water sits above or below its prediction. The next turns are worked out from the Tide model by Open-Meteo.com, CC BY 4.0, timed and scaled against the gauge over the last two days; not the official tide table. The current is the average speed between 3 and 12 metres down and the direction it sets towards, which the Port Authority gives relative to magnetic north. Both lines are the last twelve hours; the arrows under the current show where it was setting.
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Fort Denison tide
measured height
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Sydney, HMAS Penguin
MHL tide gauge, Middle Head
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Balls Head current
west of the bridge
Sea state at the Heads
Significant wave height, Hs, is the average of the highest third of the waves. Hmax is the biggest wave in the sample and the period is the time between the main waves. The direction is the one the dominant waves come from, relative to true north, as the Port Authority defines it. The line is the last twelve hours, with that direction along the bottom.
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Sydney Heads
entrance channel
Coming up the coast
A southerly change reaches Port Kembla before Botany Bay, and Botany Bay before the Heads. Watch these when a change is forecast. The barometer sees further: a steady fall ahead of a change and a jump as it passes are what to watch for.
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Sydney Airport pressure
QNH from the aviation report
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Port Kembla
VTS tower, about 80 km south
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Port Kembla breakwater
eastern breakwater
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Kurnell
Ampol Wharf, Botany Bay
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Molineaux Point
Port Botany
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Sydney Airport
main runway
Coming down the coast
Newcastle is about 115 km north of the Heads. A north-easter or a northerly already blowing there is on its way down the coast, past Norah Head and Gosford to North Head; most changes come up the coast, so this is the section for the days the wind is in the north. Newcastle's stations are the Port Authority's; Norah Head, Gosford and North Head are the Bureau of Meteorology's, ten minute means, logged every ten minutes.
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Nobbys Head
Newcastle headland, about 115 km north
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Kooragang
inside Newcastle harbour
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Norah Head
Central Coast headland, about 60 km north
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Gosford
Brisbane Water, about 45 km north
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North Head
the Heads, 90 m up
Coming from out west
A westerly, or the land breeze on a still morning, is at Penrith and Richmond before Horsley Park, and at Horsley Park before Olympic Park and the harbour. On a hot day the inland temperature says how hard the sea breeze will come in from the Heads the other way. These are the Bureau of Meteorology's stations, ten minute means, logged every ten minutes.
Map data © OpenStreetMap contributors, under the Open Database Licence.
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Penrith
foot of the Blue Mountains, about 50 km west
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Richmond
Hawkesbury, about 50 km north-west
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Camden
about 55 km south-west
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Horsley Park
about 35 km west
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Olympic Park
Homebush, about 14 km west
Rain radar
Rain over the harbour and the coast in the last two hours, a frame every ten minutes, from RainViewer's composite of the Bureau of Meteorology's radars: Terrey Hills, Appin and Newcastle cover this map. Play the loop to see which way the rain is moving and how fast. The loop looks back, not ahead: for the hours to come read the chance of rain in the forecast under the harbour wind; for the Bureau's own view, with its rainfall totals, open the Bureau's Sydney (Terrey Hills) radar page.
RainViewer radar 150 km across, centred on the harbour
RainViewer's radar composite drawn on the club's map, not the Bureau's radar page. It loads only when you ask for it: the last two hours, a frame every ten minutes, with the time of each on the Sydney clock.
Open the radar on RainViewer's site The Bureau's Sydney radar
Weather data by RainViewer, from the Bureau of Meteorology's radars. RainViewer promises nothing about the radar being there, and nor does the club.
Forecasts
Two free forecasts from elsewhere, on this page so they can be set beside the club's: the same harbour, different models. Neither is a reading, and the club makes no warranty about either.
PredictWind map pinned to Clark Island, where the fleet races
Wind over the harbour from ECMWF, GFS, UKMO, ICON and PredictWind's own 1 km model; the control at the top right of the map switches model and variable. The map is heavy, so it loads only when you ask for it.
Windy ECMWF at 9 km, with gusts and wave layers
Open Windy at Fort Denison. It opens on the gust layer of ECMWF at 9 km, and the wave layers are a tap away. Windy is a separate site: nothing from it loads here.
About these readings
Source: Wave Wind Tide Current, Port Authority of NSW, which makes no warranty about these readings, and nor does the club. A reading can be late or missing; check its time before you lean on it. Not for navigation.
The club has logged every station on that page every five minutes since 20 October 2026, in a database in its own account; nothing earlier was copied. The harbour observations logger was built for the Sydney Flying Squadron by NetEvo in October 2026. The harbour observations page has all of them, twelve hours of lines, and a CSV export of any station's readings.
The stations out west, and Norah Head, Gosford and North Head on the coast, are the Bureau of Meteorology's, © Commonwealth of Australia, Bureau of Meteorology, read every ten minutes from the Bureau's observations feed; the Bureau makes no warranty about them and nor does the club.
The Sydney, HMAS Penguin gauge is Manly Hydraulics Laboratory's, © State of New South Wales (Department of Climate Change, Energy, the Environment and Water), read every hour from MHL's data API. The club wrote to MHL on 23 October 2026 and shows the gauge while the answer is awaited. Its level is on the gauge's datum, zero Fort Denison, and its residual is the level less MHL's astronomical prediction; MHL makes no warranty about them and nor does the club.
The rain radar is RainViewer's composite of the Bureau of Meteorology's radars, read from RainViewer's public API only when you load it and drawn on the club's map; it is not the Bureau's radar page, and RainViewer makes no warranty about it, nor does the club. The Bureau's own page is linked beside it.
The pressure card is QNH from Sydney Airport's half-hourly aviation report, made by the Bureau of Meteorology and read every thirty minutes through the Aviation Weather Center of the US National Weather Service, which makes no warranty about it, and nor does the club. The dashed tail of its line is Open-Meteo's forecast pressure for the same point as the wind forecast above.