WXSIM Forecast for: Colwyn Bay
Issued by: Saratoga-Weather.org
Updated: Thursday, 20-Aug-2026 11:00 am
 
This
afternoon
Chance rain
Chance rain
Tonight

Rain likely
Rain likely
Friday

Chance rain
Chance rain
Friday
night
Fog late
Fog late
Saturday

Fog a.m.
Fog a.m.
Saturday
night
Fog late
Fog late
Sunday

Fog a.m.
Fog a.m.
Sunday
night
Fog late
Fog late
<5 mm. 5 mm. 2 mm. <2 mm. <2 mm.
High: 16° Low: 11° High: 15° Low: 10° High: 16° Low: 9° High: 17° Low: 10°
               
NNW
10-19
mph
Fresh breeze
NNW
7-18→2
mph
Moderate breeze
NW
2→6-16
mph
Moderate breeze
NNW
4
mph
Light breeze
NNW
9-18
mph
Moderate breeze
NNW→W
5-18
mph
Moderate breeze
W→NNW
5
mph
Light breeze
ENE→SSE
3
mph
Light air
UV: 3
 Medium 
UV: 3
 Medium 
UV: 4
 Medium 
UV: 4
 Medium 

 

This afternoon
 
Mostly cloudy. Patchy light fog. A chance of rain. High 16°. UV index up to 3. Wind north-northwest around 10 mph, gusting to 19 mph. Chance of precipitation 40 percent. Precipitation mostly between 2 and 5 mm.
Tonight
 
Partly to mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Light to moderate fog. Rain likely. Low 11°. Wind north-northwest around 7 mph, gusting to 18 mph, in the evening, becoming 2 mph after midnight. Chance of precipitation 60 percent. Precipitation mostly around 5 mm.
Friday
 
Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon. Patchy light fog. A chance of rain in the morning, then a slight chance of rain in the afternoon. High 15°. UV index up to 3. Wind northwest around 2 mph in the morning, becoming 6 mph, gusting to 16 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation mostly around 2 mm.
Friday night
 
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Patchy light fog after midnight. A chance of rain. Cool. Low 10°. Wind north-northwest around 4 mph. Chance of precipitation 30 percent. Precipitation mostly less than 2 mm.
Saturday
 
Partly cloudy. Patchy light fog in the morning. A slight chance of rain in the morning. High 16°. UV index up to 4. Wind north-northwest around 9 mph, gusting to 18 mph. Chance of precipitation 30 percent. Precipitation mostly less than 2 mm.
Saturday night
 
Fair to partly cloudy. Patchy light fog after midnight. Cool. Low 9°. Wind north-northwest around 5 mph, gusting to 18 mph, in the evening, becoming west after midnight.
Sunday
 
Partly cloudy. Patchy light fog in the morning. High 17°. UV index up to 4. Wind west around 5 mph in the morning, becoming north-northwest in the afternoon.
Sunday night
 
Fair in the evening, becoming fair to partly cloudy after midnight. Patchy light fog after midnight. Cool. Low 10°. Wind east-northeast around 3 mph in the evening, becoming south-southeast after midnight.
Monday
 
Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. High 20°. UV index up to 4. Wind south-southeast around 8 mph, gusting to 17 mph, in the morning, becoming east-southeast in the afternoon.
Monday night
 
Mostly cloudy to cloudy. Low 14°. Wind east-southeast around 10 mph, gusting to 18 mph.
Tuesday
 
Cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Breezy. High 18°. UV index up to 2. Wind east-southeast around 13 mph, gusting to 23 mph. Chance of precipitation 40 percent. Precipitation mostly around 2 mm.
Tuesday night
 
Mostly cloudy to cloudy. Patchy light fog. A chance of rain in the evening, then a slight chance of rain after midnight. Low 15°. Wind east-southeast around 8 mph, gusting to 17 mph. Chance of precipitation 40 percent. Precipitation mostly around 2 mm.
Wednesday
 
Dense overcast in the morning, becoming cloudy in the afternoon. Patchy light fog. Rain likely. High 18°. UV index up to 3. Wind east around 12 mph, gusting to 17 mph, in the morning, becoming 8 mph, gusting to 15 mph, in the afternoon. Chance of precipitation 70 percent. Precipitation mostly between 5 and 10 mm.
Wednesday night
 
Dense overcast. Light to moderate fog. Rain very likely. Low 15°. Wind east around 7 mph. Chance of precipitation 80 percent. Precipitation mostly between 10 and 20 mm.

WXSIM forecast formatting script by Saratoga-Weather.org.
Animated forecast icons courtesy of www.meteotreviglio.com.