Johnstone Strait
Forecast
Marine Forecast
Issued 04:00 AM PDT 12 July 2025
Today Tonight and Sunday.
Strong wind warning in effect.
Wind northwest 15 to 20 knots increasing to northwest 20 to 30 this afternoon then diminishing to northwest 15 to 20 late overnight. Wind increasing to northwest 20 to 25 Sunday morning and to northwest 30 Sunday evening.
Periods of drizzle overnight and Sunday morning. Fog patches dissipating late this morning. Fog patches forming after midnight and dissipating Sunday morning.
Extended Forecast
Stay connected
Weather Conditions
Zoom-in to make a selection



Ice Conditions
There is no ice forecast issued for this area.
Warnings
Warnings (In effect)
Strong wind warning in effect
Johnstone Strait
Issued 04:00 AM PDT 12 July 2025'Strong' winds of 20 to 33 knots are 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.
Synopsis
Technical Marine Synopsis
Issued 4:00 AM PDT 12 July 2025 Today Tonight and Sunday At 4:00 a.m. PDT today ridge located from the Alaska panhandleto Explorer.
By 4:00 p.m. PDT today ridge located from the North Coast to
Explorer.
At 4:00 a.m. PDT today frontal system located over western Bowie.
By 4:00 p.m. PDT today frontal system located over Haida Gwaii.
Marine Weather Statement
Issued 3:54 AM PDT 12 July 2025 A frontal system is approaching the northern waters today. Marginalsoutherly gales may briefly develop through Northern Hecate Strait
and Dixon Entrance East this afternoon.
A ridge of high pressure will strengthen again on Sunday afternoon.
Northwesterly gales will develop over West Vancouver Island. Westerly
gales will develop over Central and Eastern Juan de Fuca Strait.
Pacific - South Coast Area
- Bowie - southern half
- Central Coast from McInnes Island to Pine Island
- Explorer - northwestern half
- Explorer - southeastern half
- Haro Strait
- Hecate Strait - southern half
- Howe Sound
- Johnstone Strait
- Juan de Fuca Strait - central strait
- Juan de Fuca Strait - east entrance
- Juan de Fuca Strait - west entrance
- Queen Charlotte Sound - eastern half
- Queen Charlotte Sound - western half
- Queen Charlotte Strait
- Strait of Georgia - north of Nanaimo
- Strait of Georgia - south of Nanaimo
- West Coast Haida Gwaii - southern half
- West Coast Vancouver Island North
- West Coast Vancouver Island South
Another Region
- Date modified: