Marine Forecast
Issued 05:00 PM CST 20 December 2025
Tonight and Sunday.
Wind light increasing to northeast 15 knots this evening and to
northwest 25 late overnight. Wind backing to west 15 to 20 Sunday
afternoon.
Scattered flurries. Fog patches forming Sunday
morning.
Freezing spray warning in effect.
Over open water freezing spray beginning this
evening.
Temperatures minus 16 falling to minus 21 Sunday
evening.
Winds
Issued 05:00 PM CST 20 December 2025
Tonight and Sunday.
Wind light increasing to northeast 15 knots this evening and to
northwest 25 late overnight. Wind backing to west 15 to 20 Sunday
afternoon.
Waves
Issued 05:00 AM CST 20 December 2025
Today Tonight and Sunday.
Over open water seas 2 metres subsiding to 1 or less this morning
then building to 2 Sunday morning.
Weather & Visibility
Issued 05:00 PM CST 20 December 2025
Tonight and Sunday.
Scattered flurries. Fog patches forming Sunday
morning.
Air temperature
Issued 05:00 PM CST 20 December 2025
Tonight and Sunday.
Temperatures minus 16 falling to minus 21 Sunday
evening.
Freezing Spray
Issued 05:00 PM CST 20 December 2025
Tonight and Sunday.
Freezing spray warning in effect.
Over open water freezing spray beginning this
evening.
Ice Forecasts
Issued 11:00 AM EST 20 December 2025 Today Tonight and Sunday Ice Edge
Ice edge is outside the forecast region.
Ice Coverage
7 tenths grey-white ice except 9 tenths grey-white ice in the
western section. Consolidated grey-white ice along parts of the
coasts.
Warnings (In effect)
James Bay - northern half
Issued 5:00 PM CST 20 December 2025Moderate or severe freezing spray is occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine Synopsis
Issued 4:45 PM EST 20 December 2025 Tonight and Sunday At 0000 UTC Sunday quasi-stationary low 983 mb located at 68N 77W.
At 0000 UTC Sunday low 947 mb located at 59N 57W.
By 0000 UTC Monday low 969 mb located at 71N 62W.