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BoM William Bay Marine Weather Forecast

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Forecast for Thursday, 3 September
Weather: Cloudy. 80% chance of showers.
Winds: Northwesterly about 10 knots increasing to 15 to 25 knots in the morning. Winds reaching up to 30 knots in the evening.
Seas: Below 1 metre, increasing to 1.5 to 2.5 metres around midday.
Swell: Southwesterly 4 to 5 metres.
Forecast for Friday, 4 September
Weather: Cloudy. 95% chance of showers.
Winds: West to northwesterly 25 to 30 knots, reaching up to 35 knots during the morning. Winds turning southwesterly 20 to 30 knots in the early morning then tending westerly 15 to 20 knots in the evening.
Seas: 2 to 4 metres, decreasing to 1.5 to 2.5 metres during the afternoon.
Swell: Southwesterly 3 to 5 metres.
Forecast for Saturday, 5 September
Weather: Cloudy. 80% chance of showers.
Winds: Westerly 10 to 15 knots tending northwesterly 15 to 20 knots during the morning then shifting south to southwesterly during the evening.
Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon or evening.
Swell: Southwesterly 3 to 5 metres. Below 0.5 metres, tending southerly 1 to 2 metres during the morning.

Forecast for Thursday, 3 September
Weather: Partly cloudy. 80% chance of showers.
Winds: West to northwesterly about 10 knots increasing to 15 to 25 knots in the morning. Winds reaching up to 30 knots in the evening.
Seas: Below 1 metre, increasing to 1.5 to 2.5 metres around midday.
Swell: Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore.
Forecast for Friday, 4 September
Weather: Cloudy. 80% chance of showers.
Winds: West to southwesterly 15 to 25 knots, reaching up to 30 knots early in the morning. Winds decreasing to about 10 knots in the late afternoon.
Seas: 2 to 3 metres, decreasing to 1 to 2 metres during the morning, then decreasing below 1 metre during the afternoon.
Swell: Southwesterly 3 to 5 metres.
Forecast for Saturday, 5 September
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Winds: Northwesterly 15 to 20 knots shifting southerly 20 to 30 knots during the evening.
Seas: Around 1 metre.
Swell: Southwesterly 3 to 5 metres, decreasing to 2.5 to 3 metres during the afternoon.

Forecast for Thursday, 3 September
Weather: Partly cloudy.
Winds: Variable about 10 knots becoming north to northeasterly 10 to 15 knots in the late afternoon then tending north to northwesterly 15 to 20 knots in the evening. Winds reaching up to 30 knots west of Hopetoun in the late evening.
Seas: Below 1 metre.
Swell: Southwesterly 4 metres.
Forecast for Friday, 4 September
Weather: Cloudy. 90% chance of showers.
Winds: Northwesterly 20 to 30 knots turning west to southwesterly during the morning. Winds reaching up to 35 knots in the late morning and afternoon.
Seas: 1.5 to 2.5 metres, increasing to 2 to 4 metres during the morning.
Swell: Southwesterly 3 to 5 metres.
Forecast for Saturday, 5 September
Weather: Partly cloudy.
Winds: Northwest to southwesterly 15 to 25 knots becoming variable about 10 knots during the afternoon then becoming northeast to southeasterly 10 to 15 knots during the evening.
Seas: 2 to 3 metres, decreasing below 1 metre during the morning.
Swell: Southwesterly 3 to 5 metres. Southerly below 1 metre, increasing to 1 to 2 metres west of Hopetoun during the afternoon.

Forecast for Thursday, 3 September
Weather: Partly cloudy.
Winds: Variable below 10 knots becoming northeast to southeasterly 10 to 15 knots in the early afternoon. Winds reaching up to 20 knots west of Eyre in the late evening.
Seas: Below 1 metre.
Swell: Southwesterly 2.5 to 3 metres, increasing to 2.5 to 4 metres east of Eyre.
Forecast for Friday, 4 September
Weather: Mostly sunny.
Winds: Northwest to northeasterly 15 to 20 knots tending west to northwesterly 15 to 25 knots in the morning then turning southwesterly 20 to 30 knots in the early afternoon. Winds reaching up to 35 knots west of Eyre in the late afternoon.
Seas: 1 to 1.5 metres, increasing to 1 to 2 metres during the morning, then increasing to 2 to 3 metres during the afternoon.
Swell: Southwesterly 2.5 to 3 metres, increasing to 2.5 to 4 metres east of Eyre.
Forecast for Saturday, 5 September
Weather: Partly cloudy.
Winds: Southwesterly 20 to 30 knots becoming variable about 10 knots during the morning then becoming east to northeasterly 15 to 20 knots during the afternoon.
Seas: 2 to 3 metres, decreasing below 1 metre during the morning.
Swell: Southwesterly 2.5 to 4 metres.

Forecast for Thursday, 3 September
Weather: Partly cloudy.
Winds: South to southeasterly 10 to 15 knots tending south to southwesterly in the afternoon. Winds reaching up to 20 knots about Shark Bay in the evening.
Seas: Around 1 metre.
Swell: Southwesterly 2 to 2.5 metres.
Forecast for Friday, 4 September
Weather: Partly cloudy.
Winds: Southerly 10 to 15 knots.
Seas: Around 1 metre.
Swell: Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore south of Denham.
Forecast for Saturday, 5 September
Weather: Partly cloudy. 80% chance of showers.
Winds: Southerly 10 to 15 knots becoming variable about 10 knots during the morning then becoming west to southwesterly 20 to 30 knots during the day.
Seas: Below 1 metre, increasing to 1 to 2 metres during the afternoon or evening.
Swell: Southwesterly 2 to 3 metres inshore, increasing to 3 to 4 metres offshore.

Forecast for Thursday, 3 September
Weather: Partly cloudy.
Winds: Variable about 10 knots becoming northwesterly 10 to 15 knots in the middle of the day then turning west to southwesterly in the early afternoon. Winds reaching up to 20 knots offshore south of Geraldton in the late evening.
Seas: Below 1 metre.
Swell: Southwesterly 2.5 to 3 metres.
Forecast for Friday, 4 September
Weather: Partly cloudy. 50% chance of showers in the morning.
Winds: West to southwesterly 15 to 20 knots tending south to southwesterly below 10 knots during the morning and early afternoon.
Seas: 1 to 1.5 metres, decreasing below 1 metre around midday.
Swell: Southwesterly 2.5 to 3 metres, increasing to 3 to 5 metres during the morning.
Forecast for Saturday, 5 September
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Winds: Variable below 10 knots becoming west to northwesterly 15 to 20 knots during the morning then tending west to southwesterly 15 to 25 knots during the evening.
Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
Swell: Southwesterly 3 to 5 metres, decreasing to 3 metres during the evening.

Forecast for Thursday, 3 September
Weather: Cloudy. 80% chance of showers.
Winds: Westerly about 10 knots increasing to 15 to 20 knots in the morning. Winds reaching up to 25 knots offshore in the evening.
Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
Swell: Southwesterly 3 metres.
Forecast for Friday, 4 September
Weather: Partly cloudy. 70% chance of showers.
Winds: West to southwesterly 15 to 25 knots decreasing to about 10 knots in the early afternoon.
Seas: 1 to 2 metres, decreasing below 1 metre around midday.
Swell: Southwesterly 3 metres, increasing to 3 to 5 metres during the morning.
Forecast for Saturday, 5 September
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon.
Winds: Northwesterly 15 to 20 knots shifting southerly during the evening.
Seas: Below 0.5 metres, increasing to around 1 metre during the morning.
Swell: Southwesterly 3 to 5 metres, decreasing to 3 metres during the afternoon or evening.

Forecast for Thursday, 3 September
Weather: Cloudy. 95% chance of showers.
Winds: Northwesterly 15 to 25 knots, reaching up to 30 knots during the afternoon and evening. Winds turning westerly 20 to 30 knots in the late evening.
Seas: Around 1 metre, increasing to 2 to 3 metres around midday.
Swell: Southwesterly 4 metres.
Forecast for Friday, 4 September
Weather: Cloudy. 80% chance of showers.
Winds: West to southwesterly 20 to 30 knots, reaching up to 35 knots east of Cape Leeuwin early in the morning. Winds becoming southwesterly 15 to 25 knots in the morning then tending westerly 10 to 15 knots in the late afternoon.
Seas: 2 to 3 metres, decreasing to 1 to 1.5 metres around midday, then decreasing to 1 metre during the afternoon.
Swell: Southwesterly 4 to 5 metres.
Forecast for Saturday, 5 September
Weather: Cloudy. 95% chance of showers.
Winds: Northwesterly 15 to 20 knots shifting south to southwesterly 20 to 30 knots during the evening.
Seas: Around 1 metre, increasing to 1 to 1.5 metres east of Cape Leeuwin during the morning.
Swell: Southwesterly 3 to 5 metres, decreasing to 3 metres during the evening. Below 0.5 metres, tending southerly 1 to 2 metres during the morning.

Forecast for Thursday, 3 September
Weather: Mostly sunny.
Winds: Southerly 15 to 20 knots, reaching up to 25 knots inshore in the evening.
Seas: 1 to 1.5 metres.
Swell: Southwesterly 2 to 2.5 metres.
Forecast for Friday, 4 September
Weather: Partly cloudy.
Winds: Southerly 15 to 20 knots.
Seas: 1 to 1.5 metres.
Swell: Southwesterly 2 to 2.5 metres.
Forecast for Saturday, 5 September
Weather: Mostly sunny.
Winds: Southerly 15 to 20 knots turning southwesterly 15 to 25 knots during the day.
Seas: 1 to 1.5 metres.
Swell: Southwesterly 2 to 3 metres.

Forecast for Thursday, 3 September
Weather: Sunny.
Winds: Variable about 10 knots.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.
Forecast for Friday, 4 September
Weather: Sunny.
Winds: Variable about 10 knots.
Seas: Below 0.5 metres.
Swell: Westerly below 1 metre.
Forecast for Saturday, 5 September
Weather: Sunny.
Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots during the afternoon then tending west to northwesterly during the evening.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.

Forecast for Thursday, 3 September
Weather: Partly cloudy. 70% chance of showers.
Winds: West to northwesterly 10 to 15 knots becoming westerly 15 to 25 knots in the middle of the day then increasing to 20 to 30 knots in the late evening.
Seas: Below 1 metre, increasing to 1 to 2 metres around midday.
Swell: Southwesterly 3 metres.
Forecast for Friday, 4 September
Weather: Partly cloudy. 80% chance of showers.
Winds: Westerly 25 to 30 knots tending southwesterly 15 to 25 knots in the early morning then becoming westerly below 10 knots in the late evening.
Seas: 1.5 to 2.5 metres, decreasing to 1 metre around midday.
Swell: Southwesterly 3 to 5 metres.
Forecast for Saturday, 5 September
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Winds: Westerly below 10 knots tending northwesterly 15 to 20 knots during the morning then shifting south to southwesterly during the evening.
Seas: Below 0.5 metres, increasing to around 1 metre during the morning.
Swell: Southwesterly 3 to 5 metres, decreasing to 3 metres during the afternoon or evening.

Forecast for Thursday, 3 September
Weather: Sunny.
Winds: Variable about 10 knots becoming west to northwesterly 10 to 15 knots in the middle of the day.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.
Forecast for Friday, 4 September
Weather: Sunny.
Winds: Westerly 10 to 15 knots, reaching up to 20 knots inshore during the afternoon and evening.
Seas: Around 1 metre, increasing to 1 to 1.5 metres inshore during the afternoon.
Swell: Westerly below 1 metre.
Forecast for Saturday, 5 September
Weather: Sunny.
Winds: Westerly 15 to 20 knots.
Seas: Below 1 metre, increasing to 1 to 1.5 metres west of Port Hedland during the afternoon or evening.
Swell: Westerly below 1 metre.

Forecast for Thursday, 3 September
Weather: Sunny.
Winds: South to southwesterly 10 to 15 knots tending west to southwesterly in the middle of the day. Winds reaching up to 20 knots west of Onslow in the evening.
Seas: Around 1 metre, increasing to 1 to 1.5 metres about offshore western waters by early evening.
Swell: West to southwesterly around 1 metre inshore, increasing to 1.5 to 2 metres about offshore western waters.
Forecast for Friday, 4 September
Weather: Sunny.
Winds: South to southwesterly 15 to 20 knots tending west to southwesterly in the afternoon.
Seas: 1 to 1.5 metres.
Swell: West to southwesterly around 1 metre inshore, increasing to 1.5 to 2 metres about offshore western waters.
Forecast for Saturday, 5 September
Weather: Sunny.
Winds: Southerly 15 to 20 knots turning southwesterly 15 to 25 knots during the day.
Seas: 1 to 1.5 metres, increasing to 1 to 2 metres about offshore western waters.
Swell: West to southwesterly around 1 metre inshore, increasing to 1.5 to 2 metres about offshore western waters.

Forecast for Thursday, 3 September
Weather: Sunny.
Winds: Variable about 10 knots becoming northwest to southwesterly 10 to 15 knots in the early afternoon.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.
Forecast for Friday, 4 September
Weather: Sunny.
Winds: Variable about 10 knots becoming west to southwesterly 10 to 15 knots in the early afternoon.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.
Forecast for Saturday, 5 September
Weather: Sunny.
Winds: Southwesterly 10 to 15 knots becoming variable about 10 knots during the morning then becoming westerly 10 to 15 knots during the day.
Seas: Below 1 metre.
Swell: Westerly below 1 metre.
William Bay
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Warnings
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Temperature
William Bay
12 °C 11 °C 6am 19 °C 2pm
↑ Warming
Now: 12 °C
Tides
William Bay
12:52am 0.86m 3:21pm 0.33m
↓ Falling
Current: 0.58m
Weather Now for William Bay
Observations not available
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