To see a Weather Forecast for the area go to Met Office 5 day forecast this link taking you to a Met. Office site.
There are options on this site to change the location, see a UK map and observations, warnings, pressure charts etc. There is also a 5 day summary and a 30 day summary available.
or try
Weather This link takes you to BBC News and also shows a five day forecast for the area.
To see 1981 - 2010 monthly climate averages, for the nearest Met Office official reporting station at RAF Marham, go to Marham averages. This link take you to the Met Office website. There is also the option to vary the 20 year period shown.
To see Tide Tables for King's Lynn, for today and the next six days, go to Tides
This link will take you to Admiralty EasyTide