The two sites you reference will not give the necessary detail.
Was there a weather station at PdL on 3rd May 2007?
AFAIK, there is no weather station in Lagos. The only place I can think of that might have such a facility is the small airport to the east of Lagos, but I have searched for data from it without success.
The nearest weather stations are Sagres to the west and Faro to the east. Neither will give a nailed-on version of the weather in Luz. The ex-airman who is claimed as having a weather station in Luz was linking to the one in Faro.
Paulo Rebelo requested weather conditions for Luz, but seems not to have followed through, as these are not in the file.
Luz is basically bowl-shaped, with the half out to sea having been cut off. We lived in various places over the years. At the top it can be quite windy, but as one walks down the semi-bowl towards the sea, the wind drops off rapidly. By apartment 5A level, there is seldom any wind.
There are two other problems with this tale.
Any wind is normally stronger during the day, powered by the Algarve sun. By 10pm it has normally dropped to nothing.
Kate's recall is that the door slammed shut. She checked the lounge patio doors, but those were closed. To date, I have not identified where these wind gusts could have gone after entry.