One of the most reliable and accurate of all forecasting models is now free although it has been available on some web sites like windy.com already. Maybe this will increase the accuracy of a lot of "weather websites" 
From today, all ECMWF graphical products are free and accessible to all! Medium-range, extended-range and long-range forecast charts of temperature, wind, precipitation, clouds and ocean waves are just some of the products available. https://ecmwf.int/en/about/media-centre/news/2020/ecmwf-moves-towards-policy-open-data @CopernicusECMWF @WMO
source: https://twitter.com/ECMWF/status/1313780646259589120
More: https://www.ecmwf.int/en/about/media-centre/news/2020/ecmwf-moves-towards-policy-open-data
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Seen on a weather blog - the GFS has become much more accurate after a big refresh a couple of years ago but this time of year, gets a lot of grief because it doesn't model tropical system intensity very well (overestimates) past 72 hours. It tends to be pretty good with genesis and decent with potential path but cries Cat 5 wolf fairly often.
Case in point (well Cat 3/4 wolf at least