The miqaat for the people of Yemen and southern Arabia when they come via the coastal route
Question

                I hope that you can advise me about the people of the south when they come via the coastal route; is it permissible for me to enter ihram from Jeddah? Because my route is along the coast.
Praise be to Allah.
    The miqaat for the people of Yemen who come via the coastal 
    route is Yalamlam, which is known today as al-Sa’diyyah. It is not 
    permissible for the one who passes by it or comes in line with it, intending 
    to do Hajj or ‘Umrah, to pass it without entering ihram. Jeddah is not a 
    miqaat for them; rather it is the miqaat for its inhabitants and for anyone 
    who intends to do Hajj or ‘Umrah and is residing there, or who comes to it 
    without the intention of doing Hajj or ‘Umrah, then decides to do Hajj. 

    And Allah is the source of strength; may Allah send blessings 
    and peace upon our Prophet Muhammad and his family and Companions. End 
    quote. 

    Standing Committee for Academic Research and Issuing Fatwas. 

    Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh ‘Abd 
    al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Ghadyaan, Shaykh ‘Abd-Allaah ibn 
    Qa’ood 

    Fataawa al-Lajnah al-Daa’imah, 
    11/134 

    See also the answer to question number
    107988.