If you plan to visit Cardiff in March, the weather is typically alright, with an average high temperature of +10°C during the day and approximately 3 sunny days. Expect some rainy, though, as there are typically 16 rainy days in the month and around 74 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+10°C
Avg. max. temperature
-6°C
Min.
+20°C
Max.
74 mm
Total precipitation
80%
Avg. humidity
5 m/s
Avg. wind
3 ☀️
Sunny Days
11 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Cardiff has OK weather in March.
Average temperature in Cardiff in March
Here are the expected maximum, average and minimum temperatures in Cardiff for March based on the historical data.
Last Year
Historical Data
Going from a maximum of +15°C during the day to a minimum of -1°C during the night, the temperature in March averages around +11°C.
The average maximum temperature goes up 25% by the end of the month, compared with the beginning of the month, from +8°C to +12°C.
Is Cardiff warm or cold in March?
Cardiff is typically cool in March.
Maximum temperatures go up compared to the previous month from +8°C to +10°C. The minimum temperature also goes up from +3°C to +5°C.
Pack a sweater and a jacket as there will be cooler temperatures.
Take a look at how March is compared to other months in Cardiff:
Water temperature in Cardiff in March
Water in Cardiff in March is Cold. It varies from +7°C to +9°C, with an average of +8°C.This is almost similar to the air temperature, which averages +10°C.
The water temperature in March is one of the coldest of the entire year:
The warmest water temperatures in Cardiff are reached in August, when the average sea temperature rises to +17°C. The coldest water temperatures are in March, with an average of +8°C.
Can you swim in Cardiff in March?
We would not recommend swimming in Cardiff in March, the water is very cold (+8°C on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in Cardiff in March
Cardiff weather looks like this, on average, in March and the surrounding months.
February
March
April
Avg. temperature
+8°C
+10°C
+13°C
Min. temperature
-8°C
-6°C
-2°C
Max. temperature
+17°C
+20°C
+25°C
Rainfall
71 mm
74 mm
63 mm
Wind
5 m/s
5 m/s
4 m/s
Avg. water temperature
+9°C
+8°C
+10°C
Humidity
82%
80%
76%
Air pressure
1015 HPa
1014 HPa
1014 HPa
Sunny days
2
3
5
Cloudy days
10
11
10
Rainy days
14
16
15
Snowy days
2
1
0
March weather is still as ok as in February.It’s getting warmer as March arrives. The average maximum temperature goes up from +8°C to +10°C during the day.Prepare for more rain. Average rainfall goes from 71 mm to 74 mm.It feels drier, as humidity decreases from 82% to 80%.The average wind speed doesn’t change much during March, staying around 5 m/s.The good news is there are likely to be more sunny days in March, from 2 to 3.
April brings much the same weather, it remains ok.
Wind speed in Cardiff in March based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cardiff is gradually increasing during March, going from 4 m/s to 8 m/s over the course of the month.
Rain
Amount of rainfall in mm during March in Cardiff based on historical data.
Last Year
Historical Data
Typically, there is a 77% chance of rain on an average day in March, with total rainfall of approximately 191 mm. The maximum amount of rainfall per day is around 14 mm, which is considered light rain.March is a pretty wet month with over 24 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how March is compared with other months in the amount of precipitation, total mm:
Cardiff wettest month is October, where a typical day has a 65% chance of precipitation and 119 mm of rainfall per day. April, on the other hand, is the driest month with a mere 50% chance of precipitation and 63 mm of rainfall per day.
Snow
Amount of snow in mm during March in Cardiff based on historical data.
Last Year
Historical Data
Typically, there is a 3% chance of snow on an average day in March, with a total monthly snowfall of approximately 7 mm.
Here’s how March is compared with other months in the amount of snow, total mm:
How was the weather last March in Cardiff?
This is the weather in Cardiff in March 2023:
1 March
☁️
+8°C
2 March
☁️
+10°C
3 March
☁️
+7°C
4 March
☁️
+6°C
5 March
☁️
+6°C
6 March
☁️
+9°C
7 March
🌧️
+8°C
8 March
🌨️
+3°C
9 March
🌧️
+6°C
10 March
☁️
+8°C
11 March
🌧️
+8°C
12 March
🌫️
+12°C
13 March
🌧️
+14°C
14 March
☀️
+11°C
15 March
🌧️
+9°C
16 March
🌧️
+10°C
17 March
🌧️
+14°C
18 March
☁️
+14°C
19 March
☁️
+12°C
20 March
🌧️
+12°C
21 March
🌧️
+13°C
22 March
🌧️
+14°C
23 March
🌧️
+13°C
24 March
🌧️
+13°C
25 March
🌧️
+13°C
26 March
🌧️
+12°C
27 March
☁️
+11°C
28 March
🌧️
+10°C
29 March
🌧️
+13°C
30 March
🌧️
+15°C
31 March
🌧️
+12°C
In March 2023 Cardiff had 1 sunny days, 10 cloudy days, and 18 rainy days. The average maximum temperature was +11°C, with an absolute maximum of +15°C and a minimum of +3°C. The average humidity was 86%, with a maximum of 99% and a minimum of 53%. The average wind speed was 4 m/s, with a maximum of 12 m/s and a minimum of 0 m/s.
Are you planning a trip in March?
Climate Change over Years
This is how Cardiff climate have been changing during last 43 years period.
The climate in Cardiff in March has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 2010 with only 736 mm of rainfall, and the wettest year was 2022 with 1906 mm.
FAQ
Frequently asked questions about the weather in Cardiff in March:
Is March a good time to visit Cardiff?
It’s always a good time to visit Cardiff, but the weather is changeable in March, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Cardiff in March?
Not really, March is not the best time to sunbathe, unless you visit a local solarium.
Can you swim in Cardiff in March?
Swimming in Cardiff in March is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is Cardiff rainy in March?
Cardiff is often rainy in March. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Cardiff in March?
Usually, it’s not very sunny in Cardiff in March, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in United Kingdom
Check out the weather for other cities in United Kingdom.
For this page, we’ve looked at the typical weather in Cardiff, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
