The Collaborative International Dictionary of English v.0.48:

Seaward \Sea"ward\, a.
   Directed or situated toward the sea. --Donne.
   [1913 Webster]

         Two still clouds . . . sparkled on their seaward edges
         like a frosted fleece.                   --G. W. Cable.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Seaward \Sea"ward\, adv.
   Toward the sea. --Drayton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

seaward
    adv 1: in the direction of the sea; "the sailor looked seaward"
           [syn: seaward, seawards, asea]
    adj 1: (of winds) coming from the land; "offshore winds" [syn:
           offshore, seaward] [ant: inshore, onshore,
           seaward, shoreward]
    2: (of winds) coming from the sea toward the land; "an inshore
       breeze"; "an onshore gale"; "sheltered from seaward winds"
       [syn: inshore, onshore, seaward, shoreward] [ant:
       offshore, seaward]
    3: directed or situated away from inland regions and toward the
       sea or coast; "from the hill he took a seaward course"; "on
       the seaward side of the road"
    n 1: the direction toward the sea

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "seaward":
   anticlockwise, clockwise, counterclockwise, earthward, heavenward,
   homeward, in blue water, landward, leeward, leftward, oceanward,
   oceanwards, off, off soundings, offshore, out of soundings,
   rightward, seawards, widdershins, windward