The N59 at Kylemore is reportedly still impassable this evening due to flooding.
Both Galway County Council and AA Roadwatch are advising that the N59 is blocked and motorists should take different route.
The flooding has occurred an the Leenaun side of Letterfrack.
There have been other instances of Storm Diana causing difficulties on the roads today as high winds battered the county.
Earlier today traffic was impeded due to fallen power cables on the Loughrea/Woodford road at Aille Cross and on the N65.
However those have since been dealt with and the roads are clear again.
And Galway County Council urged motorists to avoid the Old Galway Road in Loughrea as a fallen tree was covering a large part of the road.
Despite those problems with the roads Galway escaped the worst of the damage from Storm Diana.
While the south and east of the country saw more than 40,000 homes and businesses without power today, there was only one major outage in Galway.
A power outage in Ballinasloe saw 877 homes and business lose their electricity this afternoon, but the ESB has since fixed the fault ahead of their estimated schedule.
The orange and yellow weather warning issued by Met Eireann ahead of Storm Diana have expired as of 6pm.
It was warned that Diana could bring gusts of 110-130km/hr on the west coast, but the strongest gusts recorded at Mace Head station today were 102km/hr at 2pm.