The defender, who has extended his loan spell from Southampton on a week-by-week basis, missed last weekend's 2-2 draw against Brighton through illness.
Seaborne will be expected to go straight back into the side with Charlton having not conceded a goal in the four games he has played since moving to The Valley.
Frontman Ricardo Fuller is close to returning from a hamstring injury but full-backs Cedric Evina (knee) and Rhoys Wiggins (metatarsal) are still out.
Striker Leon Clarke is back with the Addicks after completing his loan spell at Scunthorpe and goalkeeper John Sullivan has also returned to south-east London following his stint with Colchester, but midfielder Eggert Jonsson has gone back to Wolves.
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- Cedric Evina