try the link:

http://reverb.echo.nasa.gov/reverb/#utf8=%E2%9C%93&spatial_map=satellite&spatial_type=rectangle&keywords=mod11

Or just go to echo reverb and put in MOD11, which is MODIS LST product.

Thank you for your answer @Klemen Zaksek

You can also find MOD11 from Laads web -

http://ladsweb.nascom.nasa.gov/data/search.html

Have a look at these

http://oceancolor.gsfc.nasa.gov/

http://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=am

http://oceancolor.gsfc.nasa.gov/cgi/l3?per=DAY

We have reconstructed daily MODIS Land Surface Temperature Dataset for Europe and derived BIOCLIM variables which you can download at http://gis.cri.fmach.it/eurolst/

See: Metz, M.; Rocchini, D.; Neteler, M. 2014: Surface temperatures at the continental scale: Tracking changes with remote sensing at unprecedented detail. Remote Sensing. 2014, 6(5): 3822-3840 (http://dx.doi.org/10.3390/rs6053822)

http://gis.cri.fmach.it/eurolst/

Hi Markus thank you for valuable links. 

To give information about MODIS products, you can refer to the following publication:  

Article Investigation and validation of MODIS SST in the northern Persian Gulf

you can find the modis data on any of the USGS website such as the following link

https://earthexplorer.usgs.gov/