Tides

anders.ringheim

Hi
The tides that is shown for Svalbard area has to be very wrong. Both tidal heights and time doesnt correspond to the offical at Kartverket.no

Filip_K

Hi @anders-ringheim, can You elaborate?
If I try to get forecast for for example Ny-Ålesund, I get pretty much same result from both sources.

This one is kartverket.no:

This one is from windy:

edit: Discrepancies might come from the times of tides. Although kartverket.no denotes that Time is adjusted according to daylight saving time, if the time zone on your device is UTC+1., they are actually in UTC. This is what the same data look like when downloaded in TXT:

#Abstract:        Tides and observed water level from Ny-Ålesund
#Provider:        Statens kartverk sjø (Norwegian Hydrographic Service)
#Latitude:        78.92400000
#Longitude:       11.91500000
#Datum:           EUREF89
#Reference level: CD (Chart Datum)
#Z0: 95.2 cm
#Start time:      2024-08-28T00:00:00+01:00
#End time:        2024-09-03T00:00:00+01:00
#Unit:            cm
#Series1:         Predicted low and high tide (astronomical)
2024-08-28T01:49:00+01:00            71.7        
2024-08-28T08:06:00+01:00           124.5        
2024-08-28T14:29:00+01:00            70.4        
2024-08-28T21:13:00+01:00           126.4        
2024-08-29T03:41:00+01:00            75.6        
2024-08-29T09:50:00+01:00           119.6        
2024-08-29T16:05:00+01:00            72.0        
2024-08-29T22:45:00+01:00           132.2        
2024-08-30T05:16:00+01:00            70.0        
2024-08-30T11:18:00+01:00           123.3        
2024-08-30T17:20:00+01:00            66.8        
2024-08-30T23:49:00+01:00           141.3        
2024-08-31T06:15:00+01:00            61.2        
2024-08-31T12:15:00+01:00           130.2        
2024-08-31T18:12:00+01:00            59.1        
2024-09-01T00:35:00+01:00           150.1        
2024-09-01T06:57:00+01:00            53.0        
2024-09-01T12:57:00+01:00           137.2        
2024-09-01T18:51:00+01:00            51.5        
2024-09-02T01:11:00+01:00           157.1        
2024-09-02T07:31:00+01:00            46.2        
2024-09-02T13:32:00+01:00           142.9        
2024-09-02T19:25:00+01:00            45.3

idefix37

@Filip_K
Seems there 2h difference in Windy between local time and UTC in Svalbard.

Filip_K

@idefix37
Isn't Svalbard time same as CEST? I checked https://www.timeanddate.com/worldclock/norway/longyearbyen

idefix37

@Filip_K
Yes, so Windy local time for Svalbard is correct.
So what I have not understood is the UTC+1 you were talking about.
Your Windy screenshots are in UTC but in Settings it can be changed for local time.

Filip_K

@idefix37
I was talking about the note from kartverket.no screenshot, which I find both wrong and confusing (because times are UTC):