WXSIM Forecast for: Colwyn Bay
Issued by: Saratoga-Weather.org
Updated: Monday, 21-Sep-2026 11:00 am
 
This
afternoon
Mostly Cloudy
Mostly Cloudy
Tonight

Fog late
Fog late
Tuesday

Chance rain
Chance rain
Tuesday
night
Fog
Fog
Wednesday

Chance rain
Chance rain
Wednesday
night
Fog late
Fog late
Thursday

Fog a.m.
Fog a.m.
Thursday
night
Chance rain
Chance rain
Friday

Fog a.m.
Fog a.m.
Friday
night
Mostly Cloudy
Mostly Cloudy
2 mm. <2 mm. <5 mm. 2 mm. <2 mm.
High: 21° Low: 14° High: 19° Low: 14° High: 15° Low: 9° High: 17° Low: 11° High: 17° Low: 11°
                   
WSW
5
mph
Light breeze
SSW
4
mph
Light breeze
SSW→NNE
3
mph
Light air
SE→SW
3
mph
Light air
SW→NW
9-19
mph
Fresh breeze
NW→S
4-16
mph
Moderate breeze
S
8-17
mph
Moderate breeze
SSW
6-15→10-19
mph
Fresh breeze
W
7-15
mph
Moderate breeze
WSW
6-15
mph
Moderate breeze
UV: 3
 Medium 
UV: 2
 Low 
UV: 2
 Low 
UV: 2
 Low 
UV: 2
 Low 

 

This afternoon
 
Partly to mostly cloudy. Mild. High 21°. UV index up to 3. Wind west-southwest around 5 mph.
Tonight
 
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Patchy light fog after midnight. Low 14°. Wind south-southwest around 4 mph.
Tuesday
 
Mostly cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Mild. High 19°. UV index up to 2. Wind south-southwest around 3 mph in the morning, becoming north-northeast in the afternoon. Chance of precipitation 40 percent. Precipitation mostly around 2 mm.
Tuesday night
 
Cloudy. Patchy light fog. A chance of rain. Low 14°. Wind southeast around 3 mph in the evening, becoming southwest after midnight. Chance of precipitation 30 percent. Precipitation mostly less than 2 mm.
Wednesday
 
Cloudy in the morning, becoming partly cloudy in the afternoon. Patchy light fog. A chance of rain. High 15°, but temperatures falling in the afternoon. UV index up to 2. Wind southwest around 9 mph, gusting to 19 mph, in the morning, becoming northwest in the afternoon. Chance of precipitation 50 percent. Precipitation mostly between 2 and 5 mm.
Wednesday night
 
Partly cloudy. Patchy light fog in the evening, then moderate fog after midnight. Low 9°. Wind northwest around 4 mph, gusting to 16 mph, in the evening, becoming south after midnight.
Thursday
 
Partly cloudy in the morning, becoming mostly cloudy in the afternoon. Light to moderate fog in the morning. High 17°. UV index up to 2. Wind south around 8 mph, gusting to 17 mph.
Thursday night
 
Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Patchy light fog after midnight. A chance of rain after midnight. Low 11°. Wind south-southwest around 6 mph, gusting to 15 mph, in the evening, becoming 10 mph, gusting to 19 mph, after midnight. Chance of precipitation 40 percent. Precipitation mostly around 2 mm.
Friday
 
Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Light to moderate fog in the morning. High 17°. UV index up to 2. Wind west around 7 mph, gusting to 15 mph.
Friday night
 
Mostly cloudy. A slight chance of rain. Low 11°. Wind west-southwest around 6 mph, gusting to 15 mph. Chance of precipitation 20 percent. Precipitation mostly less than 2 mm.
Saturday
 
Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain. High 15°. UV index up to 2. Wind south-southwest around 7 mph, gusting to 17 mph, in the morning, becoming 11 mph, gusting to 20 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than 2 mm.
Saturday night
 
Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Patchy light fog. A slight chance of rain. Low 11°. Wind south-southwest around 7 mph, gusting to 15 mph, in the evening, becoming 11 mph, gusting to 21 mph, after midnight. Chance of precipitation 20 percent. Precipitation mostly less than 2 mm.
Sunday
 
Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon. High 14°. UV index up to 2. Wind west-southwest around 9 mph, gusting to 19 mph.
Sunday night
 
Partly cloudy in the evening, becoming cloudy after midnight. Low 11°. Wind south around 7 mph, gusting to 16 mph.

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