check this site tides4fishing.com/ Kearnsy, might give you some answers.

Tides are governed by the moon, the sun and the centrifugal force of the rotation of the Earth and the centrifugal force of the bulge movement of the ocean when acted upon by the moon and sun.
It's a lot more involved than just using the position of the moon in relation to Earth. The way the various celestial objects align can cause 'unusual' tide fluctuations. Also, the harmonic analysis used to predict tides can only be so accurate, especially when you have to factor fluctuating sea surface temperatures into the mix.

@bakesy , that website is great . Cheers mate! Was interesting to squash a few myths I had running my show ;).

Thanks for your reply Suba . All I will say is Im happy I don't have to calculate tides for a living .

Interesting stuff!

IFocus said..

subasurf said..

Tides are governed by the moon, the sun and the centrifugal force of the rotation of the Earth and the centrifugal force of the bulge movement of the ocean when acted upon by the moon and sun.
It's a lot more involved than just using the position of the moon in relation to Earth. The way the various celestial objects align can cause 'unusual' tide fluctuations. Also, the harmonic analysis used to predict tides can only be so accurate, especially when you have to factor fluctuating sea surface temperatures into the mix.

+ Bathymetry, rivers etc.......

temps related to high and low pressures i.e. summer big highs low tides and vice versa

predicted vs actual can be very different - check out this from Gero Port Auth

www.midwestports.com.au/profiles/midwestports/custom/seaview/