All Steam Packet crossings are also at risk
A yellow weather warning is in place for heavy rain from 3pm tomorrow (6 December) until midday on Saturday (7 December).
There's expected to be up to 25 mm across the Island but a chance of up to 50mm over the hills.
Forecasters at Ronaldsway Met Office say the bad weather may create difficult driving conditions with standing water developing, as well as a risk of localised flooding in prone locations.
Meanwhile, all Manxman sailings between today (5 December) and Saturday evening are at risk of cancellation.
Below is a full list of all the crossings at risk:
Thursday (05 December)
- 7.45pm – Subject to disruption/cancellation – final decision by 5:30pm.
Friday (06 December)
- 2.15am - Subject to disruption/cancellation – final decision by 5:30pm Thursday evening.
- 8.45am – Subject to disruption/cancellation – final decision by 7am.
- 2.15pm – Subject to disruption/cancellation – final decision by 7am.
- 7.45pm – Subject to disruption/cancellation – final decision by 5.30pm.
Saturday (07 December)
- 2.15am – Subject to disruption / cancellation – final decision by 5.30pm Friday evening.
- 8am – Subject to disruption / cancellation – final decision by 6am.
- 6.45pm – Subject to disruption / cancellation – final decision by 6am.