Tide Times

[ffejsmada]

Hi Guys,

Has anyone noticed the variation in tide time to what it states on the tide chart.
I'm not talking about tide time variations from Brisbane tides for your specific area.

Example, today high tide at Noosa according to the local tide times was 10.33am, yet the tide only changed to come in at about 9.30-10am.

The tides seem to be out by about 5 hours. Has anyone else noticed?

What's going on? Or is it just me????

Jeff

[snakecatcher]

Not sure where they measure the noosa tides but I think it is the beach so if you are fishing a long way up river there could be a considerable delay before the tide starts to move there.

[snasman]

I noticed that the other night when I was crabbing, High was susposed to be @ 8.30 but was still definetly coming in at 9.30, I put it down to me reading the wrong date .Cheers Snas

[seatime]

Hi Jeff

I think you're referring to the time of slack water, which can be a time well after the actual time the tide turned. After the turn of the tide, lets say low tide, there will still be a lot of run-off out of the river system, this run-off may only be the top 15-30cm of water or less, gradually decreasing until slack water, while under this run-off the tide is flooding.
e.g. in Port Philip Bay at the heads, slack water is about 4 hours after the turn of the tide. upstream in the Brisbane R, the run-off is most evident when watching the surface water pass a bridge pilon. the water will be running out against the pilon but rising up the pilon as the tide comes in.
Predicted tide times aren't usually out too far, unless there are severe contributing weather conditions.

regards
Steve

[ffejsmada]

Yeah Steve, that's the only explanation that I can come up with but it still doesn't make sense. I still reckon somethings out.

Even with the variation of times for specific places in the Noosa River, it's still not matching up.

I don't know.

[kingtin]

Yeah Steve, that's the only explanation that I can come up with but it still doesn't make sense. I still reckon somethings out.

Even with the variation of times for specific places in the Noosa River, it's still not matching up.

I don't know.

I think Steve's on the button although it's hard to explain. I've noticed at both the Pine and the Pin, and to some extent at Woody point, that even allowing for variations the tide often seems to be doing the opposite of what it should be doing according to the tidetable. This is more noticeable on the bigger tides.

I think this is attributable to estuarine waters still making their way to the mouth long after the turn but before the incoming has had time/strength to turn the outgoing waters. hard to explain but the tide has turned, it just hasn't gathered enough strength to combat the outgoing estuarine surface flow.

I know for sure that at certain areas at the Pin, the tide doesn't appear to be coming in despite what the tide table says........the boat is often stern to offshore on a rising. Despite this, on some occasions, (when there is no wind to turn the boat) although the boat is facing one way, the tackle is streaming out another indicating to me that lower water is running in whilst upper water is still running out.

I may be wrong though, but this is the impression i get, particularly at the Pin, and it can be bloody frustrating at times.

kev

[gruntahunta]

Also the heights of the tides make a huge difference, especially a fair way up stream...if there is a big difference between low and high tides then you have to allow extra time up the river for the turn but the tide has changed at the mouth of the rivers.

confusing I know