Tides and atmospheric pressure

PKsswellnet started the topic in
The Crystal Ball
 Saturday, 29 Jun 2019 at 04:49 pm

So I've been watching the difference between predicted and actual tide as happening in south west WA. We have had a series of Low pressure systems moving through, noticed a 40% increase in actual to predicted the other day. Understand the cause of difference due to atmospheric pressure. Does anyone know the pressure at which the tide forecast is based on. Mean of pressures across the year? Maybe I can use this info to help me predict the difference between actual and predicted and get some more waves. Reckon I've got a fix on ideal tide for several of my fav spots.

cheers
PK

thermalben Sunday, 30 Jun 2019 at 07:17 am new

Average mean surface pressure is 1013.25 hPa. We have covered this effect here:

https://www.swellnet.com/news/swellnet-analysis/2016/04/19/inverse-baro…

PKsswellnet Sunday, 30 Jun 2019 at 11:37 am new

thx

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