The 29-year-old, who has just returned to fitness following a year on the sidelines with a knee injury, will join the Shrimpers until January 8.
Mkandawire is not eligible to play in Saturday's FA Cup first-round tie at home to Stockport County.
However, he could make his first appearance for the club when they travel to Bristol Rovers in League Two three days later.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | York City | 16 | 10 | 5 | 1 | 28 | 9 | 19 | 35 |
| 2 | Forest Green RoversForest Green | 16 | 10 | 4 | 2 | 29 | 13 | 16 | 34 |
| 3 | Barnet | 16 | 11 | 0 | 5 | 34 | 20 | 14 | 33 |
| 4 | Gateshead | 16 | 10 | 3 | 3 | 28 | 19 | 9 | 33 |
| 5 | Oldham AthleticOldham | 16 | 8 | 6 | 2 | 25 | 17 | 8 | 30 |
| 6 | Rochdale | 16 | 8 | 3 | 5 | 25 | 15 | 10 | 27 |
| 7 | Yeovil TownYeovil | 16 | 7 | 4 | 5 | 20 | 15 | 5 | 25 |
| 8 | Solihull MoorsSolihull | 16 | 7 | 3 | 6 | 23 | 25 | -2 | 24 |
| 9 | AltrinchamAltrincham | 16 | 6 | 5 | 5 | 23 | 20 | 3 | 23 |
| 10 | Halifax TownHalifax | 16 | 6 | 5 | 5 | 18 | 16 | 2 | 23 |
| 11 | Eastleigh | 16 | 6 | 5 | 5 | 24 | 23 | 1 | 23 |
| 12 | Sutton UnitedSutton | 16 | 6 | 4 | 6 | 24 | 24 | 0 | 22 |
| 13 | Dagenham & RedbridgeDag & Red | 16 | 5 | 6 | 5 | 26 | 17 | 9 | 21 |
| 14 | Southend UnitedSouthend | 16 | 5 | 6 | 5 | 20 | 19 | 1 | 21 |
| 15 | Hartlepool UnitedHartlepool | 16 | 5 | 6 | 5 | 15 | 16 | -1 | 21 |
| 16 | Tamworth | 16 | 6 | 3 | 7 | 19 | 27 | -8 | 21 |
| 17 | Aldershot TownAldershot | 16 | 4 | 6 | 6 | 21 | 25 | -4 | 18 |
| 18 | Woking | 16 | 4 | 5 | 7 | 18 | 23 | -5 | 17 |
| 19 | Maidenhead UnitedMaidenhead | 16 | 4 | 4 | 8 | 20 | 26 | -6 | 16 |
| 20 | Fylde | 16 | 4 | 3 | 9 | 20 | 36 | -16 | 15 |
| 21 | Braintree TownBraintree | 16 | 3 | 4 | 9 | 11 | 19 | -8 | 13 |
| 22 | WealdstoneWealdstone | 16 | 2 | 6 | 8 | 14 | 25 | -11 | 12 |
| 23 | Boston UnitedBoston | 16 | 2 | 4 | 10 | 15 | 29 | -14 | 10 |
| 24 | Ebbsfleet | 16 | 1 | 4 | 11 | 14 | 36 | -22 | 7 |
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